WO2023142849A1

WO2023142849A1 - Ceramic housing preparation method, ceramic housing, and electronic device

Info

Publication number: WO2023142849A1
Application number: PCT/CN2022/142853
Authority: WO
Inventors: 晏刚
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-01-28
Filing date: 2022-12-28
Publication date: 2023-08-03
Also published as: CN114434589A; CN114434589B

Abstract

A ceramic housing preparation method, a ceramic housing (10), and an electronic device. The ceramic housing (10) preparation method comprises: providing a housing green body (210a) having a first glaze layer (230) on a surface; patterning the first glaze layer (230) by using laser, so as to form a first patterned layer (130); and according to the housing green body (210a) and the first patterned layer (130), obtaining a housing (10) having a first pattern. The ceramic housing (10) prepared according to the provided ceramic housing preparation method has a good decorative effect.

Description

Preparation method of ceramic shell, ceramic shell and electronic equipment

This application claims the priority of the earlier application with the application number 202210108629.2 filed on January 28, 2022 with the title of "Preparation Method for Ceramic Housing, Ceramic Housing and Electronic Equipment", and the content of the above earlier application is incorporated by reference incorporated into this text.

technical field

The present application relates to the field of electronic technology, in particular to a preparation method of a ceramic shell, a ceramic shell and electronic equipment.

Background technique

With the development of technology, electronic devices such as mobile phones and tablet computers have become indispensable tools for people. When faced with a wide range of electronic devices, consumers not only need to consider whether the functions of the electronic devices meet their own needs, but also the appearance of the housing of the electronic devices is one of the important factors that determine whether consumers choose or not. The appearance effect of the casing in the related art is relatively single, which cannot satisfy users' rich pursuit of the appearance effect of the casing.

Contents of the invention

In a first aspect, the present application provides a method for preparing a ceramic shell, the method for preparing a ceramic shell includes:

providing a shell green body having a first glaze layer on its surface;

patterning the first glaze layer with a laser to form a first patterned layer;

A ceramic shell with a first pattern is obtained according to the shell green body and the first patterned layer.

In a second aspect, the present application provides a casing, the casing comprising:

a housing body comprising a ceramic material, the housing body having an exterior surface;

The appearance surface reveals a first pattern, wherein the first pattern is presented by metal cations penetrating into the shell body.

In a third aspect, the present application provides an electronic device, which includes the ceramic case described in the second aspect.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the implementation manner. Obviously, the drawings in the following description are some implementation manners of the application, which are common to those skilled in the art. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a flowchart of a method for preparing a ceramic shell provided in an embodiment of the present application;

Fig. 2 (a)～Fig. 2 (f) are the structural representations corresponding to each step in Fig. 1;

Fig. 3 is a schematic flow chart included in S110 in Fig. 1;

Fig. 4 is a schematic flow chart included in S111 in Fig. 3;

Fig. 5 is a schematic flow chart included in S120 in Fig. 1 in an embodiment;

Fig. 6 is a schematic flow chart included in S130 in Fig. 1;

Fig. 7 is a schematic flow chart included in S130a in Fig. 6;

FIG. 8 is a schematic flow chart included in S130b in FIG. 6;

FIG. 9 is a flowchart of a method for preparing a ceramic shell provided in an embodiment of the present application;

Figure 10(a) to Figure 10(g) are structural schematic diagrams corresponding to each step in Figure 9;

Fig. 11 is a schematic flow chart included in S10 in Fig. 9;

FIG. 12 is a flow chart of a method for preparing a ceramic shell provided in another embodiment of the present application;

Fig. 13 is a schematic structural diagram corresponding to Fig. 12;

FIG. 14 is a schematic diagram of a housing provided in an embodiment of the present application;

Fig. 15 is a schematic sectional view along line I-I in Fig. 14;

Fig. 16 is a schematic diagram of a housing provided in another embodiment of the present application;

Fig. 17 is a schematic sectional view along line II-II in Fig. 16;

Fig. 18 is a schematic diagram of a housing provided in another embodiment of the present application;

FIG. 19 is a schematic perspective view of an electronic device provided in an embodiment of the present application;

FIG. 20 is an exploded schematic view of the electronic device shown in FIG. 19 .

Detailed ways

The first aspect of the present application provides a method for preparing a ceramic shell, the method for preparing a ceramic shell includes:

providing a shell green body having a first glaze layer on its surface;

patterning the first glaze layer to form a first patterned layer;

Wherein, the providing the shell green body with the first glaze layer on the surface includes:

shaping the ceramic pellets to obtain a shell green body;

disposing a first glaze slurry on at least a partial area of the surface of the shell green body; and

The first glaze slurry is dried to obtain a first glaze layer.

Wherein, the ceramic granules are molded to obtain the shell green body, including:

Ceramic powder is mixed with a binder and granulated to obtain ceramic granules, wherein the average particle size of the ceramic powder ranges from 0.2 μm to 0.8 μm, and the mesh number of the ceramic granules ranges from 40 mesh to 100 mesh, the BET specific surface area of the pellets is 6m ² /g to 10m ² /g, and in the ceramic pellets, the weight percentage of the binder is in the range of 3% to 5%; and

The ceramic particles are shaped to obtain a shell green body.

Wherein, the molding includes compression molding or injection molding; when the molding is compression molding, the molding of the ceramic particles to obtain the shell green body includes:

The molding pressure ranges from 10 MPa to 15 MPa, and the molding is carried out, and the pressure is kept for 10s to 20s, so as to mold the ceramic particles to obtain a shell green body.

Wherein, the first glaze slurry includes a glaze solution and a viscous agent, wherein the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3:1; the glaze solution It includes metal cation salt and solvent, wherein the weight percentage of the metal cation salt and the solvent is 5% to 95%.

Wherein, the thickness of the first glaze slurry is less than or equal to 20 μm, and the drying of the first glaze slurry to obtain the first glaze layer includes: baking at 80°C to 150°C for 20 minutes to 50 minutes , to form the first glaze layer on at least a partial area of the surface of the shell green body.

Wherein, said patterning said first glaze layer to form a first patterned layer includes:

Output the preset pattern to the laser engraving equipment;

The power of the laser output by the laser engraving device is controlled according to the preset pattern, and different gray levels in the preset pattern correspond to different powers of the laser light, wherein the part with the larger gray level corresponds to the laser power less power; and

The laser is used to irradiate the first glaze layer to remove part of the glaze in the first glaze layer to form the first patterned layer.

Wherein, the obtaining a ceramic shell with a first pattern according to the shell green body and the first patterned layer includes:

Debinding and sintering the shell green body and the first patterned layer to obtain a ceramic shell blank; and

The ceramic shell blank is processed to obtain a ceramic shell with a predetermined size and a first pattern.

Wherein, the processing of the ceramic shell blank to obtain the shell with a preset size and a first pattern includes:

performing CNC machining on the ceramic housing blank to obtain the housing with preset dimensions; and

Grinding and polishing the surface of the housing with the predetermined size exposing the first pattern.

Wherein, the grinding and polishing of the surface of the housing with the preset size that reveals the first pattern includes:

Grinding and polishing the surface of the casing with the predetermined size exposing the first pattern to obtain the casing, wherein the glossiness of the surface of the casing exposing the first pattern is 130Gu to 160Gu.

Wherein, the preparation method of the ceramic shell also includes:

forming a second glaze layer on the surface of the shell green body, the second glaze layer is spaced apart from the first glaze layer;

patterning the second glaze layer to form a second patterned layer, the second patterned layer is spaced apart from the first patterned layer;

Obtaining a ceramic shell with a first pattern according to the ceramic green body and the first patterned layer includes:

performing debinding and sintering the shell green body, the first patterned layer and the second patterned layer to obtain a ceramic shell blank;

Processing the ceramic shell blank to obtain a ceramic shell with a predetermined size and a first pattern and a second pattern, wherein the first pattern has a first color, and the second pattern has a second color .

Wherein, the second glaze layer is formed by drying a second glaze slurry, wherein the second glaze slurry includes a glaze solution and a viscous agent, wherein the glaze solution and the viscous agent The range of mass ratio is 1:1 to 3:1; the glaze solution includes metal cation salt and solvent, wherein, the weight percentage of the metal cation salt and the solvent is 5% to 95%.

Wherein, debinding and sintering the shell green body and the first patterned layer to obtain a ceramic shell blank, and processing the ceramic shell blank to obtain a preset size And between the shells with the first pattern, the preparation method of the ceramic shell further includes:

forming a second glaze layer on at least part of the surface of the ceramic housing blank;

patterning the second glaze layer to form a second patterned layer;

Sintering the ceramic shell blank provided with the second patterned layer to obtain a ceramic shell with a first pattern and a second pattern, wherein the first pattern has a first color, and the second pattern has a first color Two colors.

Wherein, the second glaze layer is formed by drying a second glaze slurry, wherein the second glaze slurry includes a glaze solution and a viscous agent, wherein the glaze solution and the viscous agent The mass ratio ranges from 1:1 to 3:1; the glaze solution includes a metal cation salt and a solvent, wherein the weight percentage of the metal cation salt to the solvent is 50% to 75%.

Wherein, the sintering the ceramic shell blank provided with the second patterned layer to obtain the shell with the first pattern and the second pattern includes:

Sintering the ceramic shell blank provided with the second patterned layer at 950° C. to 1200° C. for a time range of 2 hours to 3 hours to obtain a shell with the first pattern and the second pattern.

The second aspect of the present application provides a ceramic housing, the ceramic housing includes:

Wherein, the first pattern has:

The first pattern part, the grayscale of the first pattern part is the first grayscale, and the thickness of the metal cations in the first pattern part infiltrated into the shell body is the first thickness; and

The second pattern part, the grayscale of the second pattern part is the second grayscale, the thickness of the metal cations in the second pattern part infiltrated into the housing body is the second thickness, and the second grayscale is greater than the the first grayscale, and the second thickness is greater than the first thickness.

Wherein, the first pattern part is the part with the smallest grayscale in the first pattern, and the range of the first thickness D1 satisfies: 1μm≤D1≤2μm; the second pattern part is the part of the first pattern For the part with the largest gray scale, the range of the second thickness D2 satisfies: 100 μm≤D2≤200 μm.

Wherein, the thickness d1 of the shell body satisfies: 0.35mm≤d1≤0.55mm; the greater the thickness of the shell body, the greater the falling ball strength of the shell; when the thickness d1 of the shell body =0.35mm, the average falling ball strength of the shell is 50cm to 55cm; when the thickness d1 of the shell body=0.55mm, the average falling ball strength of the shell is 85cm to 88cm.

Wherein, the first pattern has a first color, and the housing further has a second pattern, and the second pattern has a second color.

A third aspect of the present application provides an electronic device, the electronic device comprising the ceramic case according to the first aspect, or any one of the first aspect, or the second aspect, or any one of the second aspect.

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Reference herein to "an embodiment" or "implementation" means that a particular feature, structure or characteristic described in connection with the embodiment or implementation may be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are independent or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be noted that the terms "first" and "second" in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The present application provides a method for preparing a ceramic shell, which is used to prepare a ceramic shell 10 (see FIG. 14 ), and the ceramic shell 10 can be applied to an electronic device 1 (see FIG. 19 and FIG. 20 ). ), the electronic device 1 may be, but not limited to, a mobile phone, a tablet computer, a notebook computer, a desktop computer, a smart bracelet, a smart watch, an e-reader, a game machine and the like with a ceramic housing 10 . When the ceramic case 10 is applied to the electronic device 1 , it may be, but not limited to, the back cover, the middle frame, the decoration and the like of the electronic device 1 . The ceramic shell 10 may be a 2D shell, or a 2.5D shell or a 3D shell. Understandably, the above introduction is an introduction to an application environment of the ceramic housing 10 , and should not be construed as a limitation to the ceramic housing 10 and the preparation method of the ceramic housing provided in the embodiments of the present application. In the implementation modes/examples of the present application, the case is described in detail by taking the case as an example of the back cover of the electronic device, which should not be construed as a limitation to the case and the preparation method of the ceramic case provided in the present application.

Please refer to FIG. 1 and FIG. 2. FIG. 1 is a flowchart of a method for preparing a ceramic shell provided by an embodiment of the present application; FIG. 2(a) to FIG. 2(f) are schematic structural diagrams corresponding to each step in FIG. The preparation method of the ceramic shell includes S110, S120 and S130. The details of S110, S120 and S130 are as follows.

S110, providing the shell green body 210a having the first glaze layer 230 on the surface.

Please refer to FIG. 2(c), which is a schematic structural diagram corresponding to S110. The first glaze layer 230 is disposed on at least a part or all of the surface of the shell green body 210a. In this embodiment, it is illustrated by taking the first glaze layer 230 disposed on the entire surface of the shell green body 210a as an example. Understandably, it should not constitute a reference to the ceramic shell preparation method provided in this application limited.

In an implementation manner, the steps included in S110 are described in detail below. Please also refer to FIG. 3 . FIG. 3 is a schematic flowchart of S110 in FIG. 1 . The S110 includes S111, S112 and S113. S111, S112 and S113 are described in detail as follows.

S111, molding the ceramic granules to obtain the shell green body 210a.

In one embodiment, the method for forming the ceramic particles will be described in detail below. Please refer to FIG. 4 , which is a schematic flowchart of S111 in FIG. 3 . S111 includes S1111 and S1112, and the details of S1111 and S1112 are as follows.

S1111, mixing ceramic powder with a binder and granulating to obtain ceramic granules, wherein the average particle size of the ceramic powder ranges from 0.2 μm to 0.8 μm, and the mesh number of the ceramic granules ranges from 40 mesh to 100 mesh, the BET specific surface area of the pellets is 6m ² /g to 10m ² /g, and the weight percentage of the binder in the ceramic pellets ranges from 3% to 5%.

Optionally, the ceramic powder includes zirconia, alumina, silicon dioxide, titanium dioxide, silicon nitride, magnesium oxide, chromium oxide, beryllium oxide, vanadium pentoxide, boron trioxide, spinel, oxide At least one of zinc, calcium oxide, mullite, and barium titanate.

Optionally, the average particle diameter range d of the ceramic powder satisfies: 0.2 μm≤d≤0.8 μm. Specifically, the average particle size of the ceramic powder may be, but not limited to, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm. The particle size of the ceramic powder is too small, which increases the difficulty of preparation, thereby increasing the cost. When the particle size of the ceramic powder is as small as nanometers, the ceramic powder is easy to agglomerate to form large particles, which will reduce the quality of the shell green body 210a produced. mechanical strength, thereby reducing the mechanical strength of the final prepared ceramic shell 10; when the particle size of the ceramic powder is too large, for example greater than 0.8 μm, the mechanical strength of the prepared shell green body 210a will also be reduced, thereby reducing The mechanical strength of the final prepared ceramic shell 10 . Therefore, when the average particle size range d of the ceramic powder satisfies: 0.2μm≤d≤0.8μm, the prepared shell green body 210a can have better mechanical strength, and then the final prepared ceramic shell 10 has better mechanical strength and lower preparation cost. "Average particle size" refers to the average value of all particle sizes in the ceramic powder.

Optionally, the mesh of the ceramic granules ranges from 40 mesh to 100 mesh. Specifically, the mesh of the ceramic granules may be, but not limited to, 40 mesh, 50 mesh, 60 mesh, 70 mesh, 80 mesh, 90 mesh, 100 mesh, etc. In other words, the particle size of the ceramic particles ranges from 150 μm to 380 μm; specifically, the particle size of the ceramic particles can be, but not limited to, 150 μm, 180 μm, 200 μm, 220 μm, 250 μm, 280 μm, 300 μm, 330 μm, 350 μm, 380 μm, etc. . The particle size of the ceramic granules is too small, which increases the difficulty of preparation and thus increases the cost. When the particle size of the ceramic granules is as small as the nanometer level, the ceramic granules are easy to agglomerate to form large particles, which will reduce the density of the prepared ceramic shell 10. Mechanical strength: when the particle size of the ceramic particles is too large, for example greater than 0.8 μm, gaps and air bubbles are likely to remain during the molding of the shell green body 210a, and the mechanical strength of the ceramic shell 10 produced will also be reduced. Therefore, when the particle size of the ceramic particles ranges from 0.2 μm to 0.8 μm, the prepared ceramic shell 10 can not only have better mechanical strength, but also have lower manufacturing cost.

Optionally, the BET specific surface area of the ceramic granules is 6m ² /g to 10m ² /g. Specifically, the BET specific surface area of the ceramic pellets may be, but not limited to, 6m ² /g, 6.5m ² /g, 7m ² /g, 7.5m ² /g, 8m 2 /g, 8.5m ² ^/ g , 9m ² /g, 9.5m ² /g, 10m ² /g, etc. The larger the specific surface area, the smaller the ceramic particles, and the ceramic particles are easy to agglomerate to form large particles, which will reduce the mechanical strength of the prepared ceramic shell 10; When the 210a is formed, gaps and air bubbles are likely to remain, which will also reduce the mechanical strength of the prepared ceramic shell 10 . In the embodiment of the present application, the BET specific surface area of the ceramic particle size is 6 m ² /g to 10 m ² /g, which can make the final prepared ceramic shell 10 have better mechanical strength.

Optionally, the adhesive is at least one of epoxy adhesive (such as epoxy resin) and polyether adhesive. It should be noted that the decomposition or volatilization temperature of the binder is lower than the temperature during debinding, so that the binder can be completely eliminated through decomposition or volatilization during debinding, and the residue of the binder can be avoided. The residue of cement causes holes to remain on the ceramic shell blank 210b during the sintering process, so as to avoid reducing the mechanical strength of the formed ceramic shell blank 210b and avoid affecting the appearance of the ceramic shell blank 210b. Optionally, the weight percentage of the binder ranges from 3% to 5%. Specifically, the weight percentage of the binder may be, but not limited to, 3%, 3.5%, 4%, 4.5%, 5% and so on.

In the embodiments of the present application, when it comes to the numerical range A to B, unless otherwise specified, it means that the endpoint value A is included, and the endpoint value B is included. For example, the weight percentage of the binder is 3% to 5%, which means that the weight percentage a of the binder satisfies: 3%≦a≦5%.

When granulating, the ceramic powder and the binder are weighed according to the preset weight ratio, the ceramic powder and the binder are evenly mixed, and the granulation equipment is used for granulation to obtain ceramic granules.

In some embodiments, the raw material components of the ceramic granules also include a dispersant, which is used to mix the binder and the ceramic powder more uniformly, and the mixed binder and ceramic powder The mixed system of the body is more stable. The dispersant can be, but not limited to, liquid paraffin and the like. In the raw material components of the ceramic pellets, the weight percentage of the dispersant ranges from 1% to 5%, specifically, it can be but not limited to 1%, 2%, 3%, 4%, 5%, etc. .

When the raw material components of the ceramic granules also include a dispersant, a color material, etc., before granulation, the preparation method further includes mixing the dispersant, color material, etc., with the ceramic powder and the binder.

S1112, molding the ceramic particles to obtain the shell green body 210a.

Specifically, the molding includes compression molding, or injection molding. When the molding is compression molding, the molding of the ceramic particles to obtain the shell green body 210a includes: compression molding at a pressure range of 10MPa to 15MPa, holding the pressure for 10s to 20s, and A shell green body 210a is obtained.

In one embodiment, the temperature for molding is normal temperature. It should be noted that the normal temperature and room temperature referred to in the embodiments of the present application refer to 25°C, or approximately equal to 25°C.

Optionally, the range of compression molding pressure may be 10MPa, or 11MPa, or 12MPa, or 13MPa, or 14MPa, or 15MPa, etc. If the molding pressure is too small, it will affect the compactness of the obtained shell green body 210a, and even cannot become a shell green body 210a with a complete shape; The mechanical properties of the obtained shell green body 210a are improved, however, the molding pressure is too high, which increases the requirements of the equipment.

Optionally, the pressure holding time may be 10s (seconds), or 12s, or 14s, or 16s, or 18s, or 20s, etc. The longer the holding time, the better the compactness and molding condition of the shell green body 210a formed, but too long holding time will affect the production efficiency.

When the molding is injection molding, the ceramic particles are placed in an injection molding machine, and the shell green body 210a is produced by injection molding.

S112, disposing the first glaze slurry 220 on at least a partial area of the surface of the shell green body 210a.

Please refer to Fig. 2(a) and Fig. 2(b) together. Fig. 2(a) shows the shell green body 210a, and Fig. 2(b) shows that the first Glaze slurry 220. (a) to (e) in FIG. 2 schematically illustrate structures corresponding to each process of preparing the ceramic shell 10 including S112.

Setting the first glaze slurry 220 on at least a part of the surface of the shell green body 210a includes: setting the first glaze slurry 220 on a part of the surface of the shell green body 210a, or, The first glaze slurry 220 is provided in the entire area of the surface of the shell green body 210a. For example, the first glaze slurry 220 is provided in a partial area of a surface of the shell green body 210a, or the first glaze slurry is provided in the entire area of a surface of the shell green body 210a 220. In this embodiment, it is illustrated by taking the first glaze slurry 220 disposed on the entire area of one surface of the shell green body 210a as an example. Understandably, it should not be construed as a limitation to the preparation method of the ceramic shell provided in the embodiments of the present application.

In one embodiment, the first glaze slurry 220 includes a glaze solution and a viscous agent, wherein the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3:1; The glaze solution includes a metal cation salt and a solvent, wherein the weight percentage of the metal cation salt and the solvent is 5% to 95%.

The viscous agent may be, but not limited to, epoxy resin or phenolic resin. The viscous agent is used to make the first glaze slurry 220 have a certain viscosity, so as to facilitate disposing the first glaze slurry 220 on the surface of the shell green body 210a.

Next, the first glaze slurry 220 will be described in detail. In the first glaze slurry 220, the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3:1, which may be but not limited to 1:1, or 1.5:1, Or 2:1, or 2.5:1, or 3:1. When the mass percentage of the glaze solution to the viscous agent is less than 1:1, the ratio of the viscous agent is too high, resulting in high viscosity of the first glaze slurry 220 , which is not conducive to spraying. When the mass percentage of the glaze solution and the viscous agent is greater than 3:1, the ratio of the viscous agent is too low, resulting in insufficient viscosity of the first glaze slurry 220, when the first When the glaze slurry 220 is disposed on the surface of the shell green body 210a, it is easy to flow, which makes the first pattern 130 in the final prepared ceramic shell 10 poor. Therefore, in the embodiment of the present application, the mass ratio of the glaze solution to the viscous agent is in the range of 1:1 to 3:1, which can avoid the low viscosity of the first glaze slurry 220 caused by The prepared first pattern 130 is poor due to the flow on the surface of the shell green body 210a, and the convenience of disposing the first glaze slurry 220 can be improved.

In the first glaze slurry 220, the metal cation salt in the glaze solution includes but not limited to one or more of iron ion salt, cobalt ion salt, and nickel ion salt. For example, the metal cation salt includes one or more of Fe ₂ (C ₂ O ₄ ) ₃ , CoC ₂ O ₄ , NiC ₂ O ₄ , NiCO ₃ , and Co(NH ₃ ) ₄ Cl. It should be noted that the so-called multiple means that the types are greater than or equal to two types. The cobalt ion salt may include, but not limited to, divalent cobalt ion salt or trivalent cobalt ion salt.

The solvent may be, but not limited to, ethyl acetate, or ethylene glycol, or butanol, or toluene, as long as the solvent can dissolve the metal cation salt.

The weight percentage of the metal cation salt to the solvent is 5% to 95%. For example, the weight percentage of the metal cation salt and the solvent can be but not limited to: 5%, or 10%, or 15%, or 20%, or 25%, or 30%, or 35%, or 40% %, or 45%, or 50%, or 55%, or 60%, or 65%, or 70%, or 75%, or 75%, or 80%, or 90%, or 95%. When the weight percent of the metal cation salt and the solvent is less than 5%, the proportion of the metal cation salt is small, which will lead to a lighter color (that is, a smaller gray scale) of the first pattern 130 finally prepared. ), even the color is not obvious. When the weight percentage of the metal cation salt to the solvent is greater than 95%, the metal cation salt is too much, and the solvent may not be able to completely dissolve the metal cation salt. Therefore, in the embodiment of the present application, the weight percentage of the metal cation salt and the solvent is 5% to 95%, which can take into account the color gray scale of the first pattern 130 that is finally prepared, and the solvent dissolves the metal cation salt. ability.

It should be noted that, since the first glaze solution is provided on the surface of the shell green body 210a in the embodiment of the present application, the shell green body 210a has not been sintered, compared with after sintering, The gaps between the ceramic particles in the shell green body 210a that has not been sintered are relatively large, therefore, the metal cations 120 in the first glaze solution can easily enter the gaps between the ceramic particles, and even into the interior of the ceramic particles. In other words, the shell green body 210a is relatively less dense, therefore, the first glaze solution can enter into the shell green body 210a relatively easily. It can be seen that, compared with after sintering, even if the weight percentage of the metal cation salt and the solvent is small, such as 5% to 50%, the first glaze solution can enter the shell relatively easily. The inside of the body green body 210a, so that the final prepared ceramic shell 10 has the first pattern 130 with better quality (for example, the gray scale is more obvious).

In addition, in the preparation method of the ceramic shell provided in the embodiment of the present application, when the first glaze slurry 220 is provided on at least a partial area of the surface of the shell green body 210a, due to the tolerance during the setting, the There may also be tolerances in the thickness of the first glaze slurry 220 on the surface of the green body 210a. Since the shell green body 210a has not been sintered, the first glaze slurry 220 can enter into the shell green body 210a relatively easily. Therefore, the different thicknesses of the first glaze slurry 220 on the surface of the shell green body 210a will lead to slightly different gray scales or even patterns of the first pattern 130 of the finally prepared ceramic shell 10, so that the prepared ceramic shell 10 presented unique features. For example, when the first pattern 130 is a marble texture, the grayscale or even the pattern of the marble texture in different ceramic shells 10 is slightly different, so that the ceramic shell 10 presents the texture of natural marble.

The method of disposing the first glaze slurry 220 on at least a partial area of the surface of the shell green body 210a may be, but not limited to: spray coating, flow coating, printing, brush coating and the like.

The thickness of the first glaze slurry 220 set on the shell green body 210a and the weight percentage of the metal salt and the solvent in the glaze solution, and the glaze in the first glaze slurry 220 The mass ratio of solution and viscous agent is related. The weight percentage of the metal cation salt and the solvent in the glaze solution is 5% to 95%, and the mass ratio of the glaze solution to the viscous agent in the first glaze slurry 220 is in the range of 1:1 When the ratio is 3:1, the thickness of the first glaze slurry 220 is less than or equal to 20 μm. For example, the thickness of the first glaze slurry 220 may be, but not limited to, 2 μm, or 5 μm, or 7 μm, or 10 μm, or 12 μm, or 15 μm, or 17 μm, or 20 μm.

The thickness of the first glaze slurry 220 and the weight percentage of the metal salt and the solvent in the glaze solution, and the mass ratio of the glaze solution and the viscous agent in the first glaze slurry 220 are certain. In some cases, the thickness of the first glaze slurry 220 is related to the maximum value of the gray scale of the first pattern 130 in the final prepared ceramic shell 10 .

The thickness of the first glaze slurry 220 and the weight percentage of the metal salt and the solvent in the glaze solution, and the mass ratio of the glaze solution and the viscous agent in the first glaze slurry 220 are certain. Situation: when the thickness of the first glaze slurry 220 is less than the threshold thickness, and the thicker the first glaze slurry 220 is, the maximum grayscale of the first pattern 130 of the final ceramic shell 10 will be The larger the value is; correspondingly, when the thickness of the first glaze slurry 220 is less than the threshold thickness, and the thickness of the first glaze slurry 220 is thinner, the final prepared first pattern 130 of the ceramic housing 10 The smaller the maximum gray value of .

It can be understood that the thickness of the first glaze slurry 220 and the weight percentage of the metal salt and the solvent in the glaze solution, and the ratio of the glaze solution and the viscous agent in the first glaze slurry 220 In the case of a certain mass ratio: when the thickness of the first glaze slurry 220 is greater than or equal to the threshold thickness, the maximum grayscale change of the first pattern 130 of the final prepared ceramic shell 10 increases as the first glaze The thickness of the slurry 220 changes to a lesser extent, or even does not change at all. For example, in this embodiment, the threshold thickness may be, but not limited to, 20 μm, or 25 μm, or 30 μm.

When the thickness of the first glaze slurry 220 is greater than or equal to the threshold thickness, the time required for subsequent patterning of the first glaze layer 230 obtained from the first glaze slurry 220 by laser is shorter. Therefore, it takes a long time to prepare the ceramic shell 10, and the manufacturing efficiency decreases.

In the implementation manner of the present application, the weight percentage of the metal cation salt and the solvent in the glaze solution is 5% to 95%, and the mass ratio of the glaze solution to the viscous agent in the first glaze slurry 220 When the range of 1:1 to 3:1, the thickness of the first glaze slurry 220 is less than or equal to 20 μm, on the one hand, it can meet the requirements of the grayscale of the first preset pattern of the final prepared ceramic shell 10 , on the other hand, it can take into account the time required for subsequent patterning of the first glaze layer 230 obtained from the first glaze slurry 220 with a laser, so that the effect of preparing the ceramic shell 10 is better.

S113 , drying the first glaze slurry 220 to obtain a first glaze layer 230 .

It can be understood that, in this embodiment, the first glaze layer 230 is formed by drying the first glaze slurry 220 . In other embodiments, the first glaze slurry 220 may also be air-dried, volatilized, or vacuumed to form the first glaze layer 230 .

Please refer to FIG. 2(c). FIG. 2(c) is a schematic diagram of the structure of FIG. 1 after S130. The shell green body 210a set in the first glaze slurry 220 is dried, the solvent in the glaze solution in the first glaze slurry 220 is volatilized, and the remaining metal cation salt and the viscous agent are The first glaze layer 230 is formed.

The time and temperature required for drying the shell green body 210 a provided with the first glaze slurry 220 are related to the thickness of the first glaze slurry 220 . Specifically, in one embodiment, in one embodiment, the thickness of the first glaze slurry 220 is less than or equal to 20 μm, and the first glaze slurry 220 is dried to obtain the first glaze layer 230, The method includes: baking at 80° C. to 150° C. for 20 minutes to 50 minutes to form the first glaze layer 230 on at least a partial area of the surface of the shell green body 210 a.

The baking temperature is 80°C to 150°C, then the baking temperature includes but not limited to 80°C, or 90°C, or 100°C, or 110°C, or 120°C, or 130°C, or 140°C, or 150°C ℃.

The baking time is 20 minutes to 50 minutes, and the baking time includes but is not limited to 20 minutes, or 25 minutes, or 30 minutes, or 35 minutes, or 40 minutes, or 45 minutes, or 50 minutes.

Drying the shell green body 210a provided with the first glaze slurry 220 is to volatilize the solvent in the first glaze slurry 220 so that the metal cation salt is fixed on the shell green body. The surface of the blank 210a is convenient for subsequent patterning. For the same first glaze slurry 220 , the higher the baking temperature, the shorter the baking time; correspondingly, the lower the baking temperature, the longer the baking time.

S120 , pattern the first glaze layer 230 to form a first patterned layer 240 .

Patterning the first glaze layer 230 to form the first patterned layer 240 may be, but not limited to, laser engraving, or texture embossing, or masking and etching.

Please refer to FIG. 2( d ). FIG. 2( d ) is a schematic diagram of the structure after S130 in FIG. 1 . Next, in an implementation manner, the specific process of S130 will be introduced in detail.

Please also refer to FIG. 5 . FIG. 5 is a schematic flowchart of S120 in FIG. 1 in an implementation manner. In this embodiment, S120 includes S121, S122, and S123, and S121, S122, and S123 are described in detail as follows.

S121, outputting the preset pattern to the laser engraving device.

The style of the preset pattern determines the style of the first pattern 130 of the final prepared ceramic shell 10 . In this embodiment, the style of the preset pattern is the same as that of the first pattern 130 of the finally prepared ceramic shell 10 , and the gray scale is the same. In other embodiments, the style of the preset pattern is similar to the style of the first pattern 130 of the final prepared ceramic housing 10, for example, the style of the preset pattern is similar to the style of the final prepared ceramic housing 10. The style of the first pattern 130 is a proportional relationship (such as zooming in to a preset multiple, or reducing to a preset multiple). In other embodiments, the grayscale of the preset pattern is similar to the grayscale of the first pattern 130 of the final prepared ceramic shell 10 .

For example, the preset pattern includes a texture pattern or a gradient pattern. Therefore, the prepared first pattern 130 of the ceramic shell 10 includes a textured pattern, or a gradient pattern. In other words, the decorative effect of the first pattern 130 includes a texture effect, or a gradient effect.

When the preset pattern includes a texture pattern, the preset pattern may include a plurality of textures arranged according to a preset rule, for example, a plurality of lines arranged according to a preset rule (for example, straight line segments, or arcs) ends, or hyperbola segments), or multiple figures arranged according to preset rules (for example, triangles, or quadrilaterals, or circles, or circular rings). When the preset pattern includes a gradient pattern, it may include an ink gradient pattern, or a marble texture gradient pattern, and the like.

In order to balance the preparation efficiency of the ceramic shell 10 and the fineness of the prepared first pattern 130, the laser engraving equipment may be, but not limited to, infrared laser engraving equipment, or ultraviolet laser engraving equipment. Correspondingly, the laser output by the laser engraving device is an infrared laser or an ultraviolet laser.

The precision of the laser engraving equipment determines the style precision of the final prepared first pattern 130 . When the laser engraving equipment is an infrared laser engraving equipment, the laser output by the laser engraving equipment is an infrared laser, for example, the spot diameter of the infrared laser is 0.08mm, or the spot diameter of the infrared laser is about is 0.08mm. When the laser engraving equipment is an ultraviolet laser engraving equipment, the laser output by the laser engraving equipment is an ultraviolet laser, for example, the spot diameter of the ultraviolet laser is 0.03mm, or the spot diameter of the ultraviolet laser is 0.03mm. It can be seen that the spot diameter of the ultraviolet laser is smaller than the spot diameter of the infrared laser. That is, the precision of the ultraviolet patterning device is higher than that of the infrared patterning device. It can be understood that although the precision of the ultraviolet patterning equipment is higher than that of the infrared patterning equipment, for the preparation of the ceramic housing 10, both the ultraviolet patterning equipment and the infrared patterning equipment can The precision requirements for the preparation of the ceramic shell 10 are met.

In addition, in the preparation method of the ceramic shell provided in the embodiment of the present application, the laser spot can also be adjusted according to the fineness of each part of the first pattern 130 to be presented. For example, the part P and the other part P' of the first pattern 130 that need to be prepared have different fineness. The fineness of the part P is the first fineness, and the fineness of the other part P' is the second fineness; if the first fineness is greater than the second fineness, then for the part P The size of the patterned light spot is smaller than the size of the patterned light spot of the other portion P'.

S122. Control the power of the laser output by the laser engraving device according to the preset pattern. Different grayscales in the preset pattern correspond to different powers of the laser, wherein the parts with larger grayscales correspond to The power of the laser is lower.

The lower the gray level in the preset pattern, the greater the power of the corresponding laser; correspondingly, the lower the corresponding laser power is in the larger gray level of the preset pattern.

Specifically, the smaller the gray level in the preset pattern, the greater the power of the corresponding laser, then, when the laser patterns the corresponding part in the first glaze layer 230, the removed The more parts there are, the less parts are left over. The less the remaining part, the less the cations in the remaining part, which leads to the smaller grayscale of the corresponding part in the first pattern 130 in the prepared ceramic shell 10 . Correspondingly, the larger the grayscale of the part in the preset pattern, the lower the power of the corresponding laser, then, when the laser patterns the corresponding part in the first glaze layer 230, the removed part The less, the more left over. The more the remaining parts are, the more cations there are in the remaining parts, which leads to the greater grayscale of the corresponding parts in the first pattern 130 in the prepared ceramic shell 10 .

It can be seen that, by using the laser to irradiate each part of the first glaze layer 230, the power of the corresponding laser is selected according to the gray scale of the preset pattern, so as to form the gray color of the preset pattern. degree corresponding to the first patterned layer 240, wherein, the thicker part of the first patterned layer 240 corresponds to the larger gray part of the preset pattern, and the thinner part of the first patterned layer 240 The part corresponds to a part with a small gray scale in the preset pattern.

In one embodiment, when each part of the first glaze layer 230 is irradiated by the laser, the part of the first glaze layer 230 corresponding to the part with the highest grayscale in the preset pattern Laser irradiation may or may not be performed on the site, and whether irradiation is required depends on the thickness of the first glaze layer 230 and the amount of metal cations 120 in the first glaze layer 230 . Correspondingly, the position in the first glaze layer 230 corresponding to the position with the smallest grayscale in the preset pattern may or may not be irradiated with laser. The thickness of the layer 230 is related to the amount of metal cations 120 in the first glaze layer 230 . As long as it is satisfied, the grayscale of the first pattern 130 in the finally prepared ceramic shell 10 is consistent with the grayscale of the preset pattern.

In this embodiment, when the first glaze layer 230 is irradiated with laser light, the laser power output by the laser engraving device corresponding to the part with the highest gray scale in the preset pattern is 0%; The laser power output by the laser engraving equipment at the part with the smallest gray scale is 100%.

S123 , using the laser to irradiate the first glaze layer 230 to remove part of the glaze in the first glaze layer 230 to form the first patterned layer 240 .

In one embodiment, when using the laser to irradiate the first glaze layer 230, it can be irradiated along a preset path, for example, the first glaze layer 230 includes one end opposite to the other end , then, the preset path may be from the one end of the first glaze layer 230 to the other end of the first glaze layer 230 .

In another embodiment, the laser is used to irradiate the first glaze layer 230, which can be irradiated according to the grayscale of the preset pattern, for example, the grayscale in the preset pattern can be irradiated first. The largest part is irradiated to the first glaze layer 230, and then the corresponding part in the first glaze layer 230 is irradiated gradually according to the decrease of the gray scale in the preset pattern. It can be understood that, in other implementation manners, the first glaze layer 230 may be irradiated according to the position with the smallest grayscale in the preset pattern first, and then gradually irradiated according to the increase in grayscale in the preset pattern. The corresponding parts in the first glaze layer 230 are irradiated.

S130, obtain the ceramic shell 10 with the first pattern 130 according to the shell green body 210a and the first patterned layer 240.

Specifically, please refer to FIG. 6 , which is a schematic flowchart of S130 in FIG. 1 . In an implementation manner, S130 includes S130a and S130b, and details of S130a and S130b are as follows.

S130a, debinding and sintering the shell green body 210a and the first patterned layer 240 to obtain a ceramic shell blank 210b.

The shell green body 210a provided with the first patterned layer 240 is sintered. During the sintering process, the viscous agent in the first patterned layer 240 volatilizes, and the metal in the first patterned layer 240 The cations 120 permeate (infiltrate) into the interior of the case green body 210a through the surface of the case green body 210a. Under the condition that the temperature and time of sintering the shell green body 210a are constant, when the corresponding part of the first patterned layer 240 in the shell green body 210a is thicker, it penetrates into the shell green body The more metal cations 120 inside 210a, therefore, the gray scale of the corresponding part in the final prepared ceramic shell 10 is larger; correspondingly, when the part in the corresponding first patterned layer 240 in the shell green body 210a The thinner it is, the less metal cations 120 permeate into the interior of the shell green body 210 a , and therefore, the gray scale of the corresponding part in the final prepared ceramic shell 10 is smaller. Therefore, when the first patterned layer 240 changes according to the thickness gradient, the metal cations 120 penetrate into the shell green body 210a after sintering the shell green body 210a and the first patterned layer 240, When debinding and sintering the shell green body 210a and the first patterned layer 240, the metal cations 120 develop color in the ceramic shell blank 210b, thereby forming a certain color (such as the first pattern 130 It has the decorative effect of the first color).

Please also refer to FIG. 7 . FIG. 7 is a schematic flow diagram of S130 a in FIG. 6 . In one embodiment, S130a includes S131a, S132a and S133a, and S131a, S132a and S133a are described in detail as follows.

S131a, gradually raising the temperature of the shell green body 210a to 800°C to 950°C for debinding, the debinding time ranges from 2h to 3h, so that the binder in the shell green body 210a is discharged .

In one embodiment, the pressure during debinding is normal pressure. It should be noted that the normal pressure referred to in the embodiments of the present application generally refers to standard atmospheric pressure.

When the raw material components of the shell green body 210a also include a dispersant, the dispersant also decomposes or volatilizes during debinding, thereby being eliminated.

It should be noted that the normal pressure referred to in the embodiments of the present application generally refers to standard atmospheric pressure.

S132a, gradually raise the temperature to 1350° C. to 1500° C. for sintering, and the sintering time ranges from 8 hours to 10 hours. as well as

S133a, lowering the temperature to obtain the ceramic shell blank 210b.

It should be noted that the debinding time and sintering time do not include the time required for heating up and cooling down. In one embodiment, lowering the temperature is to lower the temperature to room temperature, so-called room temperature, in one embodiment, is 25°C or about 25°C.

Optionally, the debinding temperature is 800°C to 950°C, specifically, but not limited to, 800°C, or 820°C, or 840°C, or 860°C, or 880°C, or 900°C, or 920°C, or 940°C, or 950°C, etc. If the temperature of debinding is too low, the adhesive removal time will be too long, which will affect the production efficiency, and even cannot be completely removed, and it is easy to leave pores on the shell blank 210a during sintering, which will affect the obtained shell blank 210a If the temperature of debinding is too high, the adhesive will decompose or volatilize too violently, and air bubbles will easily remain in the shell blank 210a, which will affect the mechanical strength of the shell blank 210a. In addition, if the debinding temperature is too high High, ceramics may crystallize prematurely, and also reduce the mechanical strength of the shell blank 210a.

Optionally, the degumming time is 2h (hour) to 3h, specifically, but not limited to 120min (minute), or 130min, or 140min, or 150min, or 160min, or 170min, or 180min, etc. . If the deglue time is too short, the degumming will be incomplete, and air bubbles may remain in the shell blank 210a. If the degumming time is too short, the production efficiency will be affected.

Optionally, the sintering temperature ranges from 1350°C to 1500°C; specifically, it may be but not limited to 1350°C, or 1380°C, or 1400°C, or 1420°C, or 1450°C, or 1480°C, or 1500°C ℃ and so on. If the sintering temperature is too low, the shell blank 210a will not be porcelained; if the sintering temperature is too high, it will easily cause overfiring, which will affect the mechanical strength of the shell blank 210a.

Optionally, the sintering time ranges from 8h to 10h; specifically, but is not limited to 8h, or 8.5h, or 9h, or 9.5h, or 10h, etc. If the sintering time of the shell green body 210a is too long, the ceramic grains may grow too large, which is not conducive to improving the mechanical strength of the shell green body 210a. If the sintering time of the shell green body 210a is too short, the density between the ceramic powder Insufficient properties may lead to insufficient ceramic formation, which will also affect the mechanical strength of the shell blank 210a produced.

S130b, processing the ceramic shell blank 210b to obtain a ceramic shell 10 with a predetermined size and a first pattern 130 .

Please refer to FIG. 8 , which is a schematic flowchart of S130b in FIG. 6 . S130b includes S131b and S132b, and S131b and S132b are described in detail as follows.

S131b, performing CNC machining on the ceramic shell blank 210b to obtain the ceramic shell 10 with a preset size.

The so-called CNC refers to computerized numerical control machining (Computerized Numerical Control Machining, CNC) processing.

S132b, grinding and polishing the surface of the ceramic housing 10 with the predetermined size where the first pattern 130 is exposed.

In one embodiment, S132b is specifically as follows: Grinding and polishing the surface of the ceramic housing 10 with the predetermined size where the first pattern 130 is exposed to obtain a ceramic housing 10, wherein the ceramic housing 10 The surface glossiness exposing the first pattern 130 is 130Gu to 160Gu.

The preset dimensions include, but are not limited to, width, length, thickness, curvature and the like. The preset size is determined according to the size of the electronic device 1 to which the ceramic housing 10 is applied. For example, when the ceramic housing 10 is suitable for a mobile phone and used as a back cover of the mobile phone, the length*width of the ceramic housing 10 may be, but not limited to, 140mm*70mm, or 150mm*80mm. In one embodiment, the ceramic shell blank 210b obtained by sintering the shell green body 210a provided with the first patterned layer 240 has the first pattern 130 obtained by processing the ceramic shell blank 210b. The thickness of the ceramic housing 10 is 0.2 mm to 1.0 mm. For example, the thickness of the ceramic housing 10 is 0.2mm, or 0.25mm, or 0.3mm, or 0.35mm, or 0.4mm, or 0.45mm, or 0.5mm, or 0.55mm, or 0.6mm, or 0.65 mm, or 0.7mm, or 0.75mm, or 0.8mm, or 0.85mm, or 0.9mm, or 0.95mm, or 1.0mm. Correspondingly, the thickness of the part of the ceramic shell 10 infiltrated by the metal cations 120 is 1 μm to 300 μm. For example, the thickness of the part of the ceramic shell 10 infiltrated by the metal cation 120 is 1 μm, or 1.5 μm, or 2 μm, or 5 μm, or 10 μm, or 15 μm, or 20 μm, or 30 μm, or 40 μm, Or 50μm, or 60μm, or 70μm, or 80μm, or 90μm, or 100μm, or 110μm, or 120μm, or 130μm, or 140μm, or 150μm, or 160μm, or 170μm, or 180μm, or 190μm, or 200μm, or 210μm , or 220 μm, or 230 μm, or 240 μm, or 250 μm, or 260 μm, or 270 μm, or 280 μm, or 290 μm, or 300 μm.

In one embodiment, the ceramic shell blank 210b obtained by sintering the shell green body 210a provided with the first patterned layer 240 has the first pattern 130 obtained by processing the ceramic shell blank 210b. The thickness of the ceramic housing 10 is 35mm to 0.55mm. For example, the thickness of the ceramic housing 10 is 0.35mm, or 0.38mm, or 0.4mm, or 0.42mm, or 0.45mm, or 0.48mm, or 0.5mm, or 0.55mm. Correspondingly, the thickness of the part of the ceramic shell 10 infiltrated by the metal cations 120 is 1 μm to 200 μm. For example, the thickness of the part of the ceramic shell 10 infiltrated by the metal cation 120 is 1 μm, or 1.5 μm, or 2 μm, or 5 μm, or 10 μm, or 15 μm, or 20 μm, or 30 μm, or 40 μm, Or 50 μm, or 60 μm, or 70 μm, or 80 μm, or 90 μm, or 100 μm, or 110 μm, or 120 μm, or 130 μm, or 140 μm, or 150 μm, or 160 μm, or 170 μm, or 180 μm, or 190 μm, or 200 μm. The thickness of the part of the ceramic housing 10 infiltrated by the metal cation 120 and the minimum gray scale is 1 μm to 2 μm, and the thickness of the part of the ceramic housing 10 infiltrated by the metal cation 120 and the maximum gray scale The thickness is 100 μm to 200 μm. For example, the thickness of the part of the ceramic shell 10 that is infiltrated by the metal cation 120 and has the minimum gray scale is 1 μm, or 1.2 μm, or 1.5 μm, or 1.8 μm or 2 μm; correspondingly, the ceramic shell The thickness of the part of the body 10 infiltrated by the metal cation 120 with the maximum gray scale is 100 μm, or 105 μm, or 110 μm, or 115 μm, or 120 μm, or 125 μm, or 130 μm, or 135 μm, or 140 μm, or 145 μm, or 150μm, or 155μm, or 160μm, or 165μm, or 170μm, or 175μm, or 180μm, or 185μm, or 190μm, or 195μm, or 200μm.

Grinding and polishing the surface of the ceramic housing 10 with a predetermined size exposing the first pattern 130 to obtain a high-gloss ceramic housing 10 . Optionally, the glossiness (60° angle test) of the surface of the ceramic housing 10 is 130Gu to 160Gu. Specifically, the glossiness of the ceramic shell 10 may be, but not limited to, 130Gu, 135Gu, 140Gu, 145Gu, 150Gu, 155Gu, 160Gu, and the like. When the gloss of the surface of the ceramic housing 10 is too low (for example, lower than 110Gu), the gloss of the surface of the ceramic housing 10 is not obvious, which affects the texture of the ceramic housing 10; when the surface of the ceramic housing 10 is When the gloss is too high (for example higher than 160Gu), the cost and process difficulty of preparing the surface of the ceramic shell 10 will be increased. When the glossiness of the surface of the ceramic casing 10 is 110Gu to 160Gu, the surface of the ceramic casing 10 has a good glossiness and is easy to manufacture.

Optionally, the Vickers hardness of the ceramic housing 10 of the present application may be, but not limited to, 1200HV to 1400HV. Specifically, it may be, but not limited to, 1200HV, 1230HV, 1250HV, 1280HV, 1300HV, 1320HV, 1350HV, 1380HV, 1400HV, etc. The higher the Vickers hardness of the ceramic case 10 is, the higher the hardness of the obtained ceramic case 10 is.

In addition, since the metal cations 120 in the first patterned layer 240 permeate into the shell green body 210a, when the shell green body 210a and the first patterned layer 240 are debinding and sintered, the metal cations 120 develops color in the ceramic shell blank 210b, and the infiltration of metal cations 120 has little effect on the structural strength of the ceramic shell 10 . In other words, the hardness of the portion of the ceramic housing 10 infiltrated by the metal cations 120 is equivalent to the hardness of the portion of the ceramic housing 10 that is not infiltrated by the metal cations 120, so that the final prepared ceramic The strength of each part of the housing 10 is comparable.

As can be seen from the foregoing introduction, the method for preparing a ceramic shell provided by the embodiment of the present application provides a first glaze layer 230 on the surface of the shell green body 210a, and uses a laser to pattern the first glaze layer 230 to form a first pattern. Layer 240. When the ceramic shell 10 provided with the first patterned layer 240 is sintered, the metal cations 120 in the first patterned layer 240 permeate (infiltrate) into the ceramic shell blank 210b as the color-developing substance 120 And color. When the temperature and time of sintering the shell green body 210a are constant, when the corresponding part of the first patterned layer 240 in the ceramic shell 10 is thicker, the The more metal cations 120 inside 210b, therefore, the gray scale of the corresponding part in the final prepared ceramic shell 10 is larger; correspondingly, when the corresponding part in the first patterned layer 240 in the shell green body 210a The thinner it is, the less metal cations 120 permeate into the interior of the ceramic shell blank 210 b , therefore, the gray scale of the corresponding part in the final prepared ceramic shell 10 is smaller. Therefore, the preparation method of the ceramic shell provided by the embodiment of the present application can control the thickness of each part in the first patterned layer 240, that is, control the content of the metal cations 120 permeating into the ceramic shell 10, thereby forming It has a decorative effect that a certain color (for example, the first pattern 130 has the first color) changes according to the grayscale gradient.

To sum up, the method for preparing the ceramic shell provided by the embodiment of the present application can take into account the change of the color grayscale of the first pattern 130 in the ceramic shell 10 and the change of the first pattern 130 when the first pattern 130 is formed. Fineness, hardness of the ceramic shell 10 , and surface gloss of the ceramic shell 10 , and thus the appearance of the prepared ceramic shell 10 is better.

In addition, in the preparation method of the ceramic shell provided in the embodiment of the present application, the shell green body 210a has not been sintered, and the shell green body 210a and the first patterned layer 240 are subjected to debinding and sintering, thereby avoiding multiple times (such as greater than or equal to 2 times) sintering on the strength of the final prepared ceramic shell 10 . If the ceramic shell 10 is sintered twice or more during the preparation process, the crystal grain size in the ceramic shell 10 will grow during the second and subsequent sintering, which will affect the final formation of the ceramic shell 10. The strength of the ceramic housing 10. Therefore, in the embodiment of the present application, the primary sintering of the shell green body 210 a and the first patterned layer 240 can make the final prepared ceramic shell 10 stronger.

The strength of the ceramic housing 10 provided by the embodiment of the present application will be described below. Usually, the falling ball strength is used to characterize the strength of an object to be tested (the object to be tested in this application is the ceramic shell 10 ). In the national standard, the so-called falling ball strength means that a steel ball with a weight of 32g is dropped from a preset height from the object to be tested to the center of the object to be tested and smashed 5 times continuously to observe whether the object to be tested is cracked or not. open. If the object to be tested is not cracked, add another 5cm (centimeter) on the basis of the preset height, re-execute falling to the center line of the object to be tested, and drop it 5 times continuously, and observe the object to be tested Whether it is cracked. Reciprocating in sequence until the steel ball smashes the object to be tested for the Nth time. Then, it shows that when the steel ball is dropped on the object to be tested, the height of the steel ball from the object to be tested during the N-1 test is the maximum height that the object to be tested can bear, and the maximum height Known as the falling ball strength.

For example, the steel ball is dropped to the center of the ceramic shell 10 at a height of 1060 cm from the ceramic shell, and smashed 5 times in a row. If the ceramic shell 10 is not cracked, continue to rise by 5 cm. Proceed to the next round of testing. That is, the steel ball is dropped to the center of the ceramic housing 10 at a height of 1065 cm from the ceramic housing, and smashed 5 times in a row. If the ceramic housing 10 is not cracked, the next round of testing is performed. That is, the steel ball is dropped to the center of the ceramic housing 10 at a height of 1065 cm from the ceramic housing, and smashed 5 times in a row. The height of the ceramic housing 1065 cm is the maximum height that the ceramic housing 10 can bear, that is, the falling ball strength of the steel ball is 65 cm.

In order to ensure the reliability of the test results, multiple (usually 10) ceramic shells 10 are usually selected for testing, and the average value of the falling ball strength of the multiple ceramic shells 10 is taken as the average value of the falling ball strength of the ceramic shell 10 .

Generally speaking, for the ceramic shell 10 obtained by the same preparation method, the larger the thickness of the ceramic shell 10 is, the greater the falling ball strength of the ceramic shell 10 is.

For example, the thickness of the ceramic shell 10 is 0.35 mm to 0.55 mm; the greater the thickness of the ceramic shell 10 , the greater the falling ball strength of the ceramic shell 10 . When the thickness of the ceramic shell 10 is 0.33mm, the average value of the falling ball strength of the ceramic shell 10 is 50cm to 55cm; when the thickness of the ceramic shell 10 is 0.55mm, the The average drop strength is 85cm to 88cm. Therefore, when the thickness of the ceramic shell 10 is 0.35 mm to 0.55 mm, the average falling ball strength of the ceramic shell 10 is 50 cm to 88 cm.

Please refer to FIG. 9 and FIG. 10 . FIG. 9 is a flow chart of a method for preparing a ceramic shell provided by an embodiment of the present application; FIG. 10( a ) to FIG. 10( g ) are structural schematic diagrams corresponding to each step in FIG. 9 . In this embodiment, the preparation method of the ceramic shell further includes S10 and S20, and details of S10 and S20 are as follows.

S10, forming a second glaze layer 260 on the surface of the shell green body 210a, where the second glaze layer 260 is spaced apart from the first glaze layer 230 . See Figure 10(c).

When the preparation method of the ceramic shell further includes S10, S10 may be performed before S110, or S10 may be performed after S110, or S10 and S110 may be performed simultaneously. In the schematic diagram of the embodiment, it is illustrated by taking S10 after S110 as an example, which should not be construed as a limitation to the preparation method of the ceramic shell provided in the embodiment of the present application.

Patterning the second glaze layer 260 to form the second patterned layer 270 may be, but not limited to, laser engraving, or texture embossing, or masking and etching.

Please also refer to FIG. 11 , which is a schematic flowchart of S10 in FIG. 9 . S10 includes S11 and S12, and the detailed description of S11 and S12 is as follows.

S11, disposing a second glaze slurry 250 on a partial area of the surface of the shell green body 210a. When S10 includes S11, and S110 includes S112, S11 may be located after S112, or S11 may be located before S112, or S11 and S112 are performed synchronously. Please refer to FIG. 10(a) for the shell blank 210a, and refer to FIG. 10(b) for the structure diagram corresponding to S11.

The second glaze slurry 250 will be described in detail below. In one embodiment, the second glaze slurry 250 includes a glaze solution and a viscous agent, wherein the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3:1; The glaze solution includes a metal cation salt and a solvent, wherein the weight percentage of the metal cation salt and the solvent is 5% to 95%.

The viscous agent in the second glaze slurry 250 may be, but not limited to, epoxy resin or phenolic resin. The viscous agent in the second glaze slurry 250 may be the same as or different from the viscous agent in the first glaze slurry 220 , which is not limited in this application. The viscous agent is used to make the second glaze slurry 250 have a certain viscosity, so as to facilitate disposing the second glaze slurry 250 on the surface of the shell green body 210a.

Next, the second glaze slurry 250 will be described in detail. In the second glaze slurry 250, the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3:1, which may be but not limited to 1:1, or 1.5:1, Or 2:1, or 2.5:1, or 3:1. When the mass percentage of the glaze solution to the viscous agent is less than 1:1, the ratio of the viscous agent is too high, resulting in high viscosity of the second glaze slurry 250 , which is not conducive to spraying. When the mass percentage of the glaze solution and the viscous agent is greater than 3:1, the ratio of the viscous agent is too low, resulting in insufficient viscosity of the second glaze slurry 250, when the second When the glaze slurry 250 is disposed on the surface of the shell green body 210a, it is easy to flow, which makes the second pattern 140 in the final prepared ceramic shell 10 poor. Therefore, in the embodiment of the present application, the mass ratio of the glaze solution to the viscous agent is in the range of 1:1 to 3:1, which can avoid the second glaze slurry 250 having a low viscosity. The prepared second pattern 140 is poor due to the flow on the surface of the shell green body 210a, and the convenience of disposing the second glaze slurry 250 can be improved. The mass ratio of the glaze solution in the second glaze slurry 250 to the viscous agent may be the same as the mass ratio of the glaze solution in the first glaze slurry 220 to the viscous agent, or may be different, and are not limited in this application.

In the second glaze slurry 250, the metal cation salt in the glaze solution includes but not limited to one or more of iron ion salt, cobalt ion salt, and nickel ion salt. For example, the metal cation salt includes one or more of Fe ₂ (C ₂ O ₄ ) ₃ , CoC ₂ O ₄ , NiC ₂ O ₄ , NiCO ₃ , and Co(NH ₃ ) ₄ Cl. It should be noted that the so-called multiple means that the types are greater than or equal to two types. The cobalt ion salt may include, but not limited to, divalent cobalt ion salt or trivalent cobalt ion salt. In one embodiment, the metal cation salt of the glaze solution in the second glaze slurry 250 is different from the metal cation salt of the glaze solution in the first glaze slurry 220, so that the final prepared first pattern The first color of 130 is different from the second color of the second pattern 140 .

The solvent may be, but not limited to, ethyl acetate, or ethylene glycol, or butanol, or toluene, as long as the solvent can dissolve the metal cation salt. The solvent in the second glaze slurry 250 may be the same as or different from the solvent in the first glaze slurry 220 , which is not limited in this application.

The weight percentage of the metal cation salt to the solvent is 5% to 95%. For example, the weight percentage of the metal cation salt and the solvent can be but not limited to: 5%, or 10%, or 15%, or 20%, or 25%, or 30%, or 35%, or 40% %, or 45%, or 50%, or 55%, or 60%, or 65%, or 70%, or 75%, or 75%, or 80%, or 90%, or 95%. When the weight percent of the metal cation salt and the solvent is less than 5%, the proportion of the metal cation salt is small, which will lead to a lighter color (that is, a smaller gray scale) of the second pattern 140 finally prepared. ), even the color is not obvious. When the weight percentage of the metal cation salt to the solvent is greater than 95%, the metal cation salt is too much, and the solvent may not be able to completely dissolve the metal cation salt. Therefore, in the embodiment of the present application, the weight percentage of the metal cation salt and the solvent is 5% to 95%, which can take into account the color gray scale of the second pattern 140 that is finally prepared, and the solvent dissolves the metal cation salt. ability.

The weight percent of the metal cation salt and the solvent of the glaze solution in the second glaze slurry 250 may be the same as the metal cation salt and the solvent of the glaze solution in the first glaze slurry 220. The weight percentages of the solvents are the same or different, and are not limited in this embodiment.

It should be noted that, since the second glaze solution is provided on the surface of the shell green body 210a in the embodiment of the present application, the shell green body 210a has not been sintered, compared with after sintering, The gaps between the ceramic particles in the shell green body 210a that has not been sintered are relatively large, therefore, the metal cations 120 in the second glaze solution can easily enter the gaps between the ceramic particles, and even into the interior of the ceramic particles. In other words, the ceramic green body is relatively less dense, therefore, the second glaze solution can easily enter into the shell green body 210a. It can be seen that, compared with after sintering, even if the weight percentage of the metal cation salt and the solvent is small, such as 5% to 50%, the second glaze solution can enter the shell relatively easily. body green body 210a, so that the final prepared ceramic shell 10 has the second pattern 140 with better quality (for example, more obvious grayscale).

In addition, in the preparation method of the ceramic shell provided in the embodiment of the present application, when the second glaze slurry 250 is provided on at least a partial area of the surface of the shell green body 210a, due to the tolerance of the setting, the second glaze slurry 250 is placed on the shell There may also be tolerances in the thickness of the second glaze slurry 250 on the surface of the green body 210a. Since the shell green body 210a has not been sintered, the second glaze slurry 250 can enter into the shell green body 210a relatively easily. Therefore, the different thicknesses of the second glaze slurry 250 on the surface of the shell green body 210a will lead to slightly different gray scales or even patterns of the second pattern 140 of the final prepared ceramic shell 10, so that the prepared ceramic shell 10 presented unique features. For example, when the second pattern 140 is a marble texture, the grayscale or even the pattern of the marble texture in different ceramic shells 10 is slightly different, so that the ceramic shell 10 presents the texture of natural marble.

The method of disposing the second glaze slurry 250 on a partial area of the surface of the shell green body 210a may be, but not limited to: spray coating, flow coating, printing, brush coating and the like.

The thickness of the second glaze slurry 250 set on the shell green body 210a and the weight percentage of the metal salt and the solvent in the glaze solution, and the glaze in the second glaze slurry 250 The mass ratio of solution and viscous agent is related. The weight percentage of the metal cation salt and the solvent in the glaze solution is 5% to 95%, and the mass ratio of the glaze solution to the viscous agent in the second glaze slurry 250 is in the range of 1:1 When the ratio is 3:1, the thickness of the second glaze slurry 250 is less than or equal to 20 μm. For example, the thickness of the second glaze slurry 250 may be, but not limited to, 2 μm, or 5 μm, or 7 μm, or 10 μm, or 12 μm, or 15 μm, or 17 μm, or 20 μm.

The thickness of the second glaze slurry 250, the weight percentage of the metal salt and the solvent in the glaze solution, and the mass ratio of the glaze solution to the viscous agent in the second glaze slurry 250 are certain. In some cases, the thickness of the second glaze slurry 250 is related to the maximum value of the gray scale of the second pattern 140 in the final prepared ceramic shell 10 .

The thickness of the second glaze slurry 250, the weight percentage of the metal salt and the solvent in the glaze solution, and the mass ratio of the glaze solution to the viscous agent in the second glaze slurry 250 are certain. Situation: when the thickness of the second glaze slurry 250 is less than the threshold thickness, and the thicker the second glaze slurry 250 is, the maximum grayscale of the second pattern 140 of the final prepared ceramic shell 10 The larger the value is; correspondingly, when the thickness of the second glaze slurry 250 is less than the threshold thickness, and the thickness of the second glaze slurry 250 is thinner, the second pattern 140 of the ceramic shell 10 finally prepared The smaller the maximum gray value of .

It can be understood that the thickness of the second glaze slurry 250 and the weight percentage of the metal salt and the solvent in the glaze solution, and the ratio of the glaze solution and the viscous agent in the second glaze slurry 250 In the case of a certain mass ratio: when the thickness of the second glaze slurry 250 is greater than or equal to the threshold thickness, the maximum grayscale change of the second pattern 140 of the final prepared ceramic shell 10 increases with the second glaze The thickness of the slurry 250 changes to a lesser extent, or even does not change at all. For example, in this embodiment, the threshold thickness may be, but not limited to, 20 μm, or 25 μm, or 30 μm.

When the thickness of the second glaze slurry 250 is greater than or equal to the threshold thickness, the time required for subsequent patterning of the second glaze layer 260 obtained from the second glaze slurry 250 by laser is shorter. Therefore, it takes a long time to prepare the ceramic shell 10, and the manufacturing efficiency decreases.

In the implementation manner of the present application, the weight percentage of the metal cation salt and the solvent in the glaze solution is 5% to 95%, and the mass ratio of the glaze solution to the viscous agent in the second glaze slurry 250 When the range of 1:1 to 3:1, the thickness of the second glaze slurry 250 is less than or equal to 20 μm, on the one hand, it can meet the requirements of the gray scale of the second preset pattern of the final prepared ceramic shell 10 , on the other hand, it can take into account the time required for subsequent patterning of the second glaze layer 260 obtained from the second glaze slurry 250 with a laser, so that the effect of preparing the ceramic shell 10 is better.

S12 , drying the second glaze slurry 250 to obtain a second glaze layer 260 .

When S10 includes S12, and S110 includes S113, S12 may be located before S113, or S12 may be located after S113, or S12 and S113 are performed simultaneously, which is not limited in this embodiment. In this implementation manner, S12 and S113 are performed synchronously as an example for description. It can be understood that when S12 and S113 are performed synchronously, the drying time can be saved, which is beneficial to shorten the time for preparing the ceramic shell 10 . Please refer to Figure 10(b) and Figure 10(c).

The shell green body 210a set in the second glaze slurry 250 is dried, the solvent in the glaze solution in the second glaze slurry 250 is volatilized, and the remaining metal cation salt and the viscous agent are The second glaze layer 260 is formed.

The time and temperature required for drying the shell green body 210 a provided with the second glaze slurry 250 are related to the thickness of the second glaze slurry 250 . Specifically, in one embodiment, S12 specifically includes: baking at 80°C to 150°C for 20 minutes to 50 minutes, so as to form the second glaze on at least a partial area of the surface of the shell green body 210a Layer 260.

Drying the shell green body 210a provided with the second glaze slurry 250 is to volatilize the solvent in the second glaze slurry 250 so that the metal cation salt is fixed on the shell green body. The surface of the blank 210a is convenient for subsequent laser patterning. For the same second glaze slurry 250 , the higher the baking temperature, the shorter the baking time; correspondingly, the lower the baking temperature, the longer the baking time.

S20 , patterning the second glaze layer 260 to form a second patterned layer 270 , where the second patterned layer 270 is spaced from the first patterned layer 240 .

When the preparation method of the ceramic shell further includes S20, S20 may be located before S120, or S20 may be located after S120, or S20 and S120 may be performed simultaneously. In the schematic diagram of the embodiment, it is illustrated by taking S20 after S120 as an example, which should not be construed as a limitation to the preparation method of the ceramic shell provided in the embodiment of the present application. After S20, please refer to FIG. 10(d) for the corresponding structure.

Correspondingly, S130 includes S130', and S130' is described in detail as follows.

S130', debinding and sintering the shell green body 210a, the first patterned layer 240 and the second patterned layer 270 to obtain a ceramic shell blank 210b.

For debinding and sintering in S130', please refer to the previous description, and will not repeat them here. Please refer to Fig. 10(e) for the structure corresponding to S130'.

S140', processing the ceramic shell blank 210b to obtain a ceramic shell 10 with a predetermined size and having a first pattern 130 and a second pattern 140, wherein the first pattern 130 has a first color, and The second pattern 140 has a second color. The first color is different from the second color. For example, the first color is gray and the second color is red; or, the first color is gray and the second color is yellow. Please refer to Fig. 10(f) and Fig. 10(g) for the structure corresponding to S140', wherein Fig. 10(g) is a cross-sectional view along line A-A of Fig. 10(f).

In summary, the method for preparing a ceramic shell provided in the embodiment of the present application includes S110, S10, S120, S20, S130' and S140'. Fig. 10(a) to Fig. 10(g) are schematic structural diagrams corresponding to the preparation method of the ceramic shell provided in this embodiment.

Please refer to FIG. 12 and FIG. 13 together. FIG. 12 is a flowchart of a method for preparing a ceramic shell provided in another embodiment of the present application; FIG. 13 is a schematic structural diagram corresponding to FIG. 12 . The preparation method of the ceramic shell includes S110, S120, S130, and S140, and between S130 and S140, the preparation method of the ceramic shell further includes S1, S2, and S3. In other words, the preparation method of the ceramic shell includes S110, S120, S130, S1, S2, S3 and S140. S1, S2 and S3 are described in detail as follows.

S1, forming a second glaze layer 260 on at least part of the surface of the ceramic shell blank 210b.

Specifically, the ceramic shell blank 210b has a first pattern 130, please refer to FIG. 13(a). The second glaze layer 260 is formed by drying the second glaze slurry 250 disposed on the ceramic shell blank 210b. Specifically, please refer to FIG. 13(b) for setting the second glaze slurry 250 on the ceramic shell blank 210b, and please refer to FIG. 13(c) for a schematic view of the structure after S1.

In this embodiment, the second glaze layer 260 may be disposed on a part or all of the ceramic shell blank 210b.

The second glaze layer 260 in the preparation method of the ceramic shell provided in this embodiment is basically the same as the second glaze layer 260 in the preparation method of the ceramic shell provided in the previous embodiment. In the manner, the second glaze layer 260 is disposed on the shell green body 210a, and in this embodiment, the second glaze layer 260 is disposed on the ceramic shell green body 210b. In the above embodiment, the glaze solution in the second glaze slurry 250 includes a metal cation salt and a solvent, wherein the weight percentage of the metal cation salt and the solvent is 5% to 95%. In this embodiment, the glaze solution in the second glaze slurry 250 includes a metal cation salt and a solvent, wherein the weight percentage of the metal cation salt to the solvent is 50% to 75%.

Specifically, in this embodiment, the second glaze slurry 250 includes a glaze solution and a viscous agent, wherein the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3 : 1; the glaze solution comprises a metal cation salt and a solvent, wherein the weight percentage of the metal cation salt and the solvent is 50% to 75%.

The viscous agent in the second glaze slurry 250 may be, but not limited to, epoxy resin or phenolic resin. The viscous agent in the second glaze slurry 250 may be the same as or different from the viscous agent in the first glaze slurry 220, which is not limited in this application. The viscous agent is used to make the second glaze slurry 250 have a certain viscosity, so as to facilitate disposing the second glaze slurry 250 on the surface of the shell green body 210a.

The weight percentage of the metal cation salt and the solvent is 50% to 75%, which can be but not limited to: 50%, or 55%, 60%, or 65%, or 70%, or 75%. When the weight percent of the metal cation salt and the solvent is less than 50%, the proportion of the metal cation salt is small, which will lead to a lighter color (that is, a smaller grayscale) of the first pattern 130 finally prepared. ), even the color is not obvious. When the weight percentage of the metal cation salt to the solvent is greater than 75%, the metal cation salt is too much, and the solvent may not be able to completely dissolve the metal cation salt. Therefore, in the embodiment of the present application, the weight percentage of the metal cation salt and the solvent is 50% to 75%, which can take into account the color gray scale of the first pattern 130 that is finally prepared, and the solvent dissolves the metal cation salt. ability.

The method of disposing the second glaze slurry 250 on a partial area of the surface of the ceramic shell blank 210b may be, but not limited to: spray coating, flow coating, printing, brush coating and the like.

The thickness of the second glaze slurry 250 set on the ceramic shell blank 210b and the weight percentage of the metal salt and the solvent in the glaze solution, and the glaze in the second glaze slurry 250 The mass ratio of feed solution and viscous agent is related. The weight percentage of the metal cation salt and the solvent in the glaze solution is 50% to 75%, and the mass ratio of the glaze solution to the viscous agent in the second glaze slurry 250 is in the range of 1:1 When the ratio is 3:1, the thickness of the second glaze slurry 250 is less than or equal to 20 μm. For example, the thickness of the second glaze slurry 250 may be, but not limited to, 2 μm, or 5 μm, or 7 μm, or 10 μm, or 12 μm, or 15 μm, or 17 μm, or 20 μm.

In the embodiment of the present application, the weight percentage of the metal cation salt and the solvent in the glaze solution is 50% to 75%, and the mass ratio of the glaze solution to the viscous agent in the second glaze slurry 250 When the range of 1:1 to 3:1, the thickness of the second glaze slurry 250 is less than or equal to 20 μm, on the one hand, it can meet the requirements of the gray scale of the second preset pattern of the final prepared ceramic shell 10 , on the other hand, it can take into account the time required for subsequent patterning of the second glaze layer 260 obtained from the second glaze slurry 250 with a laser, so that the effect of preparing the ceramic shell 10 is better.

S2 , patterning the second glaze layer 260 to form a second patterned layer 270 .

The method of patterning the second glaze layer 260 to form the second patterned layer 270 may be, but not limited to, laser engraving, or texture embossing, or masking and etching.

Specifically, referring to Fig. 13(d), the shape of the second patterned layer 270 in this embodiment may be the same as or different from the shape of the second patterned layer 270 provided in the previous embodiment. The shape of the second patterned layer 270 described in the method is different from the shape of the second patterned layer 270 provided in the previous embodiment as an example, and it should not be understood as an explanation of the method for preparing the ceramic shell provided in the embodiment of the present application. limited.

It should be noted that, in the schematic diagram of this embodiment, the second glaze layer 260 is disposed on the surface of the ceramic shell blank 210b where the first pattern 130 is exposed, and completely covers the surface where the first pattern 130 is located. hint. In other embodiments, the first pattern 130 may be located on the left area of the surface of the ceramic shell blank 210b, then the second glaze layer 260 is located on the surface of the ceramic shell blank 210b right area. The present application does not limit the positions of the second glaze slurry 250 and the second glaze layer 260 relative to the first pattern 130 .

S3, sintering the ceramic shell blank 210b provided with the second patterned layer 270, wherein the first pattern 130 has a first color, and the second pattern 140 has a second color.

S140, processing the ceramic shell blank 210b to obtain a ceramic shell 10 with a predetermined size and having a first pattern 130 and a second pattern 140, wherein the first pattern 130 has a first color, the The second pattern 140 has a second color.

Please refer to FIG. 13(e) and FIG. 13(f). FIG. 13(e) is a schematic diagram of the structure after S3; FIG. 13(f) is a schematic cross-sectional view along line B-B in FIG. 13(e).

In this embodiment, the first color is different from the second color.

It should be noted that the ceramic shell blank 210b is formed by sintering the shell green blank 210a, and the ceramic shell blank 210b is denser than the shell green blank 210a. In other words, the permeability of the second glaze solution in the ceramic shell blank 210b is not as good as that of the second glaze solution in the shell green body 210a. In the preparation method of the ceramic shell provided in this embodiment, the second glaze layer 260 is formed on at least part of the surface of the ceramic shell blank 210b. Therefore, the metal cation salt in the glaze solution of the second glaze solution and the The weight percentage of the solvent is relatively high, ranging from 50% to 75%, which can facilitate the gray scale of the second pattern 140 in the ceramic shell 10 formed during the subsequent sintering of the ceramic shell blank 210b to be more obvious.

In addition, in the preparation method of the ceramic shell provided in this embodiment, since the ceramic shell blank 210b is denser than the shell green body 210a, the second glaze layer 260 obtained by drying the second glaze solution The shape of the ceramic shell blank 210b is more controllable, and the second patterned layer 270 obtained by patterning the second glaze layer 260 is more controllable, that is, metal cations 120 penetrate into the ceramic shell The body blank 210b is more controllable, therefore, the second pattern 140 in the final ceramic shell 10 is more controllable and has higher fineness. In other words, the second pattern 140 in the ceramic casing 10 prepared by the preparation method of the ceramic casing provided in this embodiment is finer than the first pattern 130 .

In addition, although in this embodiment, the preparation of the ceramic shell 10 includes sintering the shell green body 210a into a ceramic shell blank 210b, and then sintering the ceramic shell blank 210b provided with the second patterned layer 270 Sintering to obtain the ceramic shell 10 with the first pattern 130 and the second pattern 140, by controlling the parameters (such as sintering temperature and sintering time) when sintering the ceramic shell blank 210b provided with the second patterned layer 270 , and the falling ball strength of the prepared ceramic shell 10 can also be maintained in a relatively high range.

Specifically, in this embodiment, S3 specifically includes: sintering the ceramic shell blank 210b provided with the second patterned layer 270 at 950°C to 1200°C, and the sintering time ranges from 2h to 3h, so as to obtain The ceramic casing 10 of the first pattern 130 and the second pattern 140 .

When the temperature is lower than 950°C, the sintering temperature is too low, and the metal cations 120 in the second patterned layer 270 cannot penetrate well or even penetrate into the ceramic shell 10 formed by the ceramic shell blank 210b; in addition When the temperature is lower than 950° C., the sintering temperature is too low, and the ceramic shell blank 210 b cannot be porcelained well, which will affect the structural strength of the final prepared ceramic shell 10 . When the temperature is higher than 1200° C., the grain size of crystals formed during sintering of the ceramic shell blank 210 b will be excessively long, thereby affecting the strength of the final prepared ceramic shell 10 . Therefore, in the embodiment of the present application, the sintering temperature selected when sintering the ceramic shell blank 210b provided with the second patterned layer 270 is 950°C to 1200°C. On the one hand, it can ensure that the prepared ceramic shell 10 has a relatively high structural strength, on the other hand, it can make the metal cations 120 in the second patterned layer 270 better penetrate into the ceramic shell blank 210b, so that the second pattern 140 of the ceramic shell 10 Has a higher quality.

The temperature selected for sintering the ceramic shell blank 210b provided with the second patterned layer 270 is 950°C to 1200°C. For example, the temperature may be but not limited to 950°C, or 1000°C, or 1050°C, or 1100°C, or 1150°C or 1200°C.

The sintering time ranges from 2h (hour) to 3h (hour), for example, the sintering time range is 2h, or 2h 10min (minute), or 2h 20min, or 2h 30min, or 2h 40min, or 2h 50min, or 3h.

It can be understood that, when the thickness of the second glaze layer 260 is constant and the thickness of the ceramic shell blank 210b is constant, and the quality of the final ceramic shell 10 and the parameters of the second pattern 140 are constant: the The higher the sintering temperature, the shorter the required sintering time; correspondingly, the lower the sintering temperature, the longer the required sintering time.

In the embodiment of the present application, when sintering the ceramic shell blank 210b provided with the second patterned layer 270, the sintering temperature is 950°C to 1200°C, and the sintering time is 2h to 3h. The quality of the shell 10 and the second pattern 140 , on the other hand, can shorten the sintering time, which improves the efficiency of manufacturing the ceramic shell 10 .

In addition, when it is necessary to prepare patterns with more than two colors, the first pattern 130 with the first color, the second pattern 140 with the second color, and the Nth pattern with the Nth color can be sequentially prepared, wherein, N≥ 3. Thereby, it is realized that the prepared ceramic shell 10 has patterns of various colors. For example, the prepared ceramic shell 10 can have multi-color texture effects.

The embodiment of the present application also provides a ceramic shell 10, which can be prepared by the ceramic shell preparation method described above; the ceramic shell preparation method can prepare the ceramic shell provided in the embodiment of the present application Body 10. The ceramic housing 10 can be applied to an electronic device 1 (see FIG. 19 and FIG. 20 ), and the electronic device 1 can be, but not limited to, a mobile phone, a tablet computer, a notebook computer, a desktop computer, a smart bracelet, a smart watch, an electronic Readers, game machines, and other devices having the ceramic case 10 . When the ceramic case 10 is applied to the electronic device 1 , it may be, but not limited to, the back cover, the middle frame, the decoration and the like of the electronic device 1 . The ceramic shell 10 may be a 2D shell, or a 2.5D shell or a 3D shell.

Please refer to FIG. 14 and FIG. 15 together. FIG. 14 is a schematic diagram of a housing provided by an embodiment of the present application; FIG. 15 is a schematic cross-sectional view along line I-I in FIG. 14 . The ceramic housing 10 includes a housing body 110, the housing body 110 includes a ceramic material, and the housing body 110 has an appearance surface (ie, a first surface 111). The appearance surface reveals a first pattern 130 , wherein the first pattern 130 is presented by metal cations 120 penetrating into the shell body 110 .

In this embodiment, since the first pattern 130 is presented by metal cations 120 penetrating into the casing body 110, the first pattern 130 will not increase the thickness of the ceramic casing 10 additionally, the The thickness of the housing body 110 is the thickness of the ceramic housing 10 .

The ceramic housing 10 is a ceramic housing, and the housing body 110 is made of ceramic material. Optionally, the ceramic material includes zirconia, alumina, silicon dioxide, titanium dioxide, silicon nitride, magnesium oxide, chromium oxide, beryllium oxide, vanadium pentoxide, boron trioxide, spinel, zinc oxide , calcium oxide, mullite, barium titanate at least one. In a specific embodiment, the ceramic material includes zirconia ceramics.

The ceramic casing 10 provided in the embodiment of the present application has a first pattern 130, therefore, the ceramic casing 10 has a decorative effect, and when the ceramic casing 10 is applied to an electronic device 1, the electronic device 1 has Better appearance and better discrimination.

The decoration effect of the first pattern 130 includes at least one of texture effect and gradient effect. In FIG. 14 and FIG. 15 , the decorative effect of the first pattern 130 is a texture effect as an example for illustration. Please refer to FIG. 16 and FIG. 17 together. FIG. 16 is a schematic diagram of a housing provided in another embodiment of the present application; FIG. 17 is a schematic cross-sectional view along line II-II in FIG. 16 . In FIG. 16 and FIG. 17 , the decorative effect of the first pattern 130 is a gradient effect as an example for illustration.

When the decorative effect of the first pattern 130 includes a texture effect, the first pattern 130 is a texture pattern, for example, the first pattern 130 includes a plurality of textures arranged according to a preset rule, for example, according to a preset A plurality of lines arranged regularly (for example, a straight line segment, or an arc end, or a hyperbola segment), or a plurality of graphics arranged according to a preset rule (for example, a triangle, or a quadrilateral, or a circle, or a ring shape). When the decorative effect of the first pattern 130 includes a gradient effect, for example, it may include an ink gradient pattern, or a marble texture gradient pattern, and the like. It should be noted that, the gradient effect is reflected in the gradient change of the metal cations 120 along a certain direction or certain directions in the ceramic shell 10 . In FIG. 16 and FIG. 17 , the first pattern 130 is a love heart pattern, which is an example of a gradient effect for illustration, and should not be construed as a limitation to the gradient effect and pattern of the ceramic housing 10 provided by the embodiment of the present application.

In one embodiment, the housing body 110 has a first surface 111 and a second surface 112 opposite to each other, the first surface 111 is the appearance surface of the ceramic housing 10, and the metal cation 120 is provided In the housing body 110 and distributed with the first surface 111 (please refer to FIG. 14 to FIG. 17 further). The casing body 110 has an appearance surface, and the metal cations 120 are disposed in the casing body 110 and adjacent to the first surface 111 .

It can be seen from the method for preparing the ceramic shell described above that the metal cations 120 enter the interior of the shell green body 210a from the surface of the shell green body 210a on which the first patterned layer 240 is provided. The ceramic shell 10 is obtained by sintering the shell green body 210 a. Therefore, the metal cations 120 are disposed inside the shell body 110 , adjacent to the first surface 111 .

In one embodiment, the glossiness of the first surface 111 is greater than the glossiness of the second surface 112 .

The glossiness of the first surface 111 is greater than the glossiness of the second surface 112 , so that the exterior surface of the ceramic housing 10 is more glossy, so that the ceramic housing 10 presents a better texture.

In this embodiment, the second surface 112 is set opposite to the first surface 111, therefore, the second surface 112 is usually used as the inner surface of the ceramic housing 10, and the second surface 112 is usually not observed. Therefore, when preparing the ceramic housing 10, it is not necessary to perform high-precision polishing treatment on the second surface 112, or even to perform polishing treatment on the second surface 112, thereby saving the cost of preparing the ceramic housing. 10 cost.

In one embodiment, the glossiness (60° angle test) of the first surface 111 is 130Gu to 160Gu. Specifically, the glossiness of the ceramic shell body 210 may be, but not limited to, 130Gu, 135Gu, 140Gu, 145Gu, 150Gu, 155Gu, 160Gu and so on.

When the gloss of the first surface 111 of the ceramic housing 10 is too low (for example, lower than 110Gu), the gloss of the appearance surface of the ceramic housing 10 is not obvious, which affects the appearance surface of the ceramic housing 10. texture; when the gloss of the first surface 111 of the ceramic housing 10 is too high (for example, higher than 160 Gu), the cost and process difficulty of preparing the first surface 111 of the ceramic housing 10 are increased. When the glossiness of the first surface 111 of the ceramic casing 10 is 110Gu to 160Gu, the surface of the ceramic casing 10 has a good glossiness and is easy to manufacture.

Optionally, the Vickers hardness of the ceramic shell 10 of the present application may be, but not limited to, 1200HV to 1400HV, so that the ceramic shell 10 has relatively high hardness. Specifically, it may be, but not limited to, 1200HV, 1230HV, 1250HV, 1280HV, 1300HV, 1320HV, 1350HV, 1380HV, 1400HV, etc.

In one embodiment, the first pattern 130 has a first pattern portion 131 and a second pattern portion 132 (see FIG. 16 ). The grayscale of the first pattern part 131 is the first grayscale, and the thickness of the metal cations 120 in the first pattern part 131 penetrating into the housing body 110 is the first thickness. The grayscale of the second pattern part 132 is the second grayscale, the thickness of the metal cations 120 infiltrated into the housing body 110 in the second pattern part 132 is the second thickness, and the second grayscale is larger than the second grayscale. The first grayscale, the second thickness is greater than the first thickness.

In one embodiment, please refer to FIG. 14 to FIG. 17 , the thickness d1 of the shell body 110 satisfies: 0.2mm≤d1≤1.0mm; the dispersion thickness d2 of the metal cations 120 satisfies: 1μm≤d2 ≤300μm.

For example, the thickness of the ceramic housing 10 is 0.2mm, or 0.25mm, or 0.3mm, or 0.35mm, or 0.4mm, or 0.45mm, or 0.5mm, or 0.55mm, or 0.6mm, or 0.65 mm, or 0.7mm, or 0.75mm, or 0.8mm, or 0.85mm, or 0.9mm, or 0.95mm, or 1.0mm. Correspondingly, the thickness of the part of the ceramic shell 10 infiltrated by the metal cations 120 is 1 μm to 300 μm. For example, the thickness of the part of the ceramic shell 10 infiltrated by the metal cation 120 is 1 μm, or 1.5 μm, or 2 μm, or 5 μm, or 10 μm, or 15 μm, or 20 μm, or 30 μm, or 40 μm, Or 50μm, or 60μm, or 70μm, or 80μm, or 90μm, or 100μm, or 110μm, or 120μm, or 130μm, or 140μm, or 150μm, or 160μm, or 170μm, or 180μm, or 190μm, or 200μm, or 210μm , or 220 μm, or 230 μm, or 240 μm, or 250 μm, or 260 μm, or 270 μm, or 280 μm, or 290 μm, or 300 μm.

In one embodiment, the housing body 110 includes ceramics, and the thickness d1 of the housing body 110 satisfies: 0.35mm≤d1≤0.55mm. In order to distinguish the minimum dispersion thickness d2 of the metal cation 120 (marked as d2' in the figure for convenience) to meet: 1μm≤d2'≤2μm; the maximum dispersion thickness d2" of the metal cation 120 satisfies: 100μm≤d2 ”≤200μm.

In one embodiment, the first pattern part 131 is the part with the smallest grayscale in the first pattern 130, and the range of the first thickness D1 satisfies: 1μm≤D1≤2μm; the second pattern part 132 It is the part with the largest gray scale in the first pattern 130 , and the range of the second thickness D2 satisfies: 100 μm≤D2≤200 μm.

Since the gray scale at the minimum dispersion thickness of the metal cation 120 is the smallest, the minimum dispersion thickness of the metal cation 120 is the first pattern portion 131; Therefore, the maximum dispersion thickness of the metal cations 120 is the second pattern part 132, therefore, D1=d2', D2=d2".

The first thickness D1 may be, but not limited to, 1 μm, or 1.2 μm, or 1.4 μm, or 1.6 μm, or 1.8 μm, or 2.0 μm. The second thickness D2 may be, but not limited to, 100 μm, or 110 μm, or 120 μm, or 130 μm, or 140 μm, or 150 μm, or 160 μm, or 170 μm, or 180 μm, or 190 μm, or 200 μm.

The above-mentioned range of the first pattern part 131 and the second pattern part 132 makes the ceramic housing 10 have a relatively obvious contrast, so that the decorative effect of the first pattern 130 in the ceramic housing 10 is more obvious. .

In one embodiment, the thickness d1 of the casing body 110 satisfies: 0.2mm≤d1≤1.0mm; the thickness d2 of the metal cations 120 infiltrated into the casing body 110 satisfies: 1μm≤d2≤300μm.

In one embodiment, the thickness d1 of the housing body 110 satisfies: 0.35mm≤d1≤0.55mm; the greater the thickness of the housing body 110, the greater the ball falling strength of the ceramic housing 10; when When the thickness d1 of the housing body 110 = 0.35 mm, the average falling ball strength of the ceramic housing 10 is 50 cm to 55 cm; when the thickness d1 of the housing body 110 = 0.55 mm, the ceramic housing 10 The average falling ball strength is 85cm to 88cm.

The thickness d1 of the housing body 110 satisfies: 0.35mm≤d1≤0.55mm, for example, the thickness of the housing body 110 is 0.35mm, or 0.38mm, or 0.40mm, or 0.42mm, or 0.45mm, or 0.48mm, or 0.5mm, or 0.52mm, or 0.55mm. When the thickness d1 of the body of the ceramic housing 10 satisfies: 0.35mm≤d1≤0.55mm, the ceramic housing 10 can be made light and thin, and when the ceramic housing 10 is applied to the electronic device 1, it is beneficial to all Thinning of the electronic device 1 described above.

Since the first pattern 130 is presented by the metal cations 120 penetrating into the casing body 110 , the first pattern 130 does not increase the thickness of the ceramic casing 10 additionally. When the ceramic housing 10 further includes the second pattern 140 , similarly, the second pattern 140 will not additionally increase the thickness of the ceramic housing 10 . Therefore, the thickness of the housing body 110 is the thickness of the ceramic housing 10 . The thickness of the ceramic shell 10 is 0.35 mm to 0.55 mm; the greater the thickness of the ceramic shell 10 , the greater the falling ball strength of the ceramic shell 10 . When the thickness of the ceramic housing 10 is 0.33mm, the average value of the falling ball strength of the ceramic housing 10 is 50cm to 55cm; when the thickness of the ceramic housing 10 is 0.55mm, the The average drop strength is 85cm to 88cm. Therefore, when the thickness of the ceramic shell 10 is 0.35 mm to 0.55 mm, the average falling ball strength of the ceramic shell 10 is 50 cm to 88 cm.

In one embodiment, the ceramic material includes one of zirconia ceramics and alumina ceramics; the metal cations 120 include at least one or more of iron ions, cobalt ions, and nickel ions.

In one embodiment, please also refer to FIG. 18 , which is a schematic diagram of a housing provided in another embodiment of the present application. The first pattern 130 has a first color, and the ceramic housing 10 further has a second pattern 140, and the second pattern 140 has a second color.

The first pattern 130 has a first color, and the gray scale of the first color of each part in the first pattern 130 may be the same or different, which is not limited in this embodiment. The second pattern 140 has a second color, and the grayscale of the second color at each part of the second pattern 140 may be the same or different, which is not limited in this embodiment.

In the embodiment of the present application, the ceramic housing 10 has a first pattern 130 and a second pattern 140 , so that the ceramic housing 10 has a richer appearance effect.

The present application also provides an electronic device 1 , the electronic device includes the casing described in any one of the foregoing implementation manners. The electronic device 1 provided by the present application will be described in detail below with reference to the accompanying drawings. Please refer to FIG. 19 and FIG. 20 together. FIG. 19 is a three-dimensional schematic view of an electronic device provided by an embodiment of the present application; FIG. 20 is an exploded schematic view of the electronic device shown in FIG. 19 . The electronic device 1 may be, but not limited to, a mobile phone, a tablet computer and other devices with a ceramic housing 10 . For the ceramic housing 10 , please refer to the previous description, and details will not be repeated here. In this embodiment, the preset surface 110 of the ceramic housing 10 constitutes a part of the appearance surface of the electronic device 1 .

In this embodiment, the electronic device 1 includes a display screen 30 , a middle frame 70 , a circuit board 40 and a camera module 50 in addition to the ceramic housing 10 . The ceramic housing 10 and the display screen 30 are respectively disposed on opposite sides of the middle frame 70 . The middle frame 70 is used to carry the display screen 30 , and the sides of the middle frame 70 are exposed from the ceramic housing 10 and the display screen 30 . The ceramic housing 10 and the middle frame 70 form a receiving space for receiving the circuit board 40 and the camera module 50 . The ceramic housing 10 has a light-transmitting portion 10a, and the camera module 50 can take pictures through the light-transmitting portion 10a on the ceramic housing 10, that is, the camera module 50 in this embodiment is a rear camera mod. It can be understood that, in other implementation manners, the light-transmitting portion 10 a may be disposed on the display screen 30 , that is, the camera module 50 is a front-facing camera module. In the schematic diagram of this embodiment, the light-transmitting portion 10a is used as an opening for illustration. In other embodiments, the light-transmitting portion 10a may not be an opening, but a light-transmitting material, such as plastic, glass, etc. .

It can be understood that the electronic device 1 described in this embodiment is only a form of the electronic device 1 applied to the ceramic housing 10, and should not be construed as a limitation to the electronic device 1 provided in this application, nor should it It should be understood as a limitation to the ceramic housing 10 provided in various embodiments of the present application.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned Changes, modifications, substitutions and modifications are made to the embodiments, and these improvements and modifications are also regarded as the protection scope of the present application.

Claims

A method for preparing a ceramic shell, characterized in that the method for preparing a ceramic shell comprises:

providing a shell green body having a first glaze layer on its surface;

patterning the first glaze layer to form a first patterned layer;

A ceramic shell with a first pattern is obtained according to the shell green body and the first patterned layer.
The method for preparing a ceramic shell according to claim 1, wherein said providing the shell green body having a first glaze layer on the surface comprises:

shaping the ceramic pellets to obtain a shell green body;

disposing a first glaze slurry on at least a partial area of the surface of the shell green body; and

The first glaze slurry is dried to obtain a first glaze layer.
The method for preparing a ceramic shell according to claim 2, wherein said molding the ceramic granules to obtain the shell green body comprises:

Ceramic powder is mixed with a binder and granulated to obtain ceramic granules, wherein the average particle size of the ceramic powder ranges from 0.2 μm to 0.8 μm, and the mesh number of the ceramic granules ranges from 40 mesh to 100 mesh, the BET specific surface area of the pellets is 6m 2 /g to 10m 2 /g, and in the ceramic pellets, the weight percentage of the binder is in the range of 3% to 5%; and

The ceramic particles are shaped to obtain a shell green body.
The method for preparing a ceramic shell according to claim 3, wherein the molding includes compression molding or injection molding; when the molding is compression molding, the ceramic particles are molded to obtain a casing green bodies, including:

The molding pressure ranges from 10 MPa to 15 MPa, and the molding is carried out, and the pressure is kept for 10s to 20s, so as to mold the ceramic particles to obtain a shell green body.
The method for preparing a ceramic shell according to claim 2, wherein the first glaze slurry comprises a glaze solution and a viscous agent, wherein the mass ratio of the glaze solution to the viscous agent is The range is 1:1 to 3:1; the glaze solution includes a metal cation salt and a solvent, wherein the weight percentage of the metal cation salt to the solvent is 5% to 95%.
The method for preparing a ceramic shell according to claim 2, wherein the thickness of the first glaze slurry is less than or equal to 20 μm, and the drying of the first glaze slurry to obtain the first glaze layer comprises: : Baking at 80° C. to 150° C. for 20 minutes to 50 minutes to form the first glaze layer on at least a partial area of the surface of the shell green body.
The method for preparing a ceramic shell according to claim 1, wherein the obtaining a ceramic shell with a first pattern according to the shell green body and the first patterned layer comprises:

Debinding and sintering the shell green body and the first patterned layer to obtain a ceramic shell blank; and

The ceramic shell blank is processed to obtain a ceramic shell with a predetermined size and a first pattern.
The method for preparing a ceramic shell according to claim 7, wherein processing the ceramic shell blank to obtain the shell with a preset size and a first pattern comprises:

performing CNC machining on the ceramic housing blank to obtain the housing with preset dimensions; and

Grinding and polishing the surface of the housing with the predetermined size exposing the first pattern.
The method for preparing a ceramic shell according to claim 8, wherein the grinding and polishing the surface of the shell of the preset size where the first pattern is exposed comprises:

Grinding and polishing the surface of the casing with the predetermined size exposing the first pattern to obtain the casing, wherein the glossiness of the surface of the casing exposing the first pattern is 130Gu to 160Gu.
The method for preparing a ceramic shell according to claim 1, wherein the method for preparing a ceramic shell further comprises:

forming a second glaze layer on the surface of the shell green body, the second glaze layer is spaced apart from the first glaze layer;

patterning the second glaze layer to form a second patterned layer, the second patterned layer is spaced apart from the first patterned layer;

Obtaining a ceramic shell with a first pattern according to the ceramic green body and the first patterned layer includes:

performing debinding and sintering the shell green body, the first patterned layer and the second patterned layer to obtain a ceramic shell blank;

Processing the ceramic shell blank to obtain a ceramic shell with a predetermined size and a first pattern and a second pattern, wherein the first pattern has a first color, and the second pattern has a second color .
The method for preparing a ceramic shell according to claim 10, wherein the second glaze layer is formed by drying a second glaze slurry, wherein the second glaze slurry includes a glaze solution and a viscous agent, wherein the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3:1; the glaze solution includes a metal cation salt and a solvent, wherein the metal cation salt and the The weight percentage of the solvent is 5% to 95%.
The method for preparing a ceramic shell according to claim 7, characterized in that, debinding and sintering the shell green body and the first patterned layer to obtain a ceramic shell blank, and the Between processing the ceramic shell blank to obtain a shell with a preset size and a first pattern, the preparation method of the ceramic shell further includes:

forming a second glaze layer on at least part of the surface of the ceramic housing blank;

patterning the second glaze layer to form a second patterned layer;

Sintering the ceramic shell blank provided with the second patterned layer to obtain a ceramic shell with a first pattern and a second pattern, wherein the first pattern has a first color, and the second pattern has a first color Two colors.
The method for preparing a ceramic shell according to claim 12, wherein the second glaze layer is formed by drying a second glaze slurry, wherein the second glaze slurry includes a glaze solution and a viscous agent, wherein the mass ratio of the glaze solution to the viscous agent ranges from 1:1 to 3:1; the glaze solution includes a metal cation salt and a solvent, wherein the metal cation salt and the The weight percentage of the solvent is 50% to 75%.
The method for preparing a ceramic shell according to claim 12, wherein the sintering the ceramic shell blank provided with the second patterned layer to obtain the shell with the first pattern and the second pattern comprises: :

Sintering the ceramic shell blank provided with the second patterned layer at 950° C. to 1200° C. for a time range of 2 hours to 3 hours to obtain a shell with the first pattern and the second pattern.
A ceramic housing, characterized in that the ceramic housing comprises:

a housing body comprising a ceramic material, the housing body having an exterior surface;

The appearance surface reveals a first pattern, wherein the first pattern is presented by metal cations penetrating into the shell body.
The ceramic housing according to claim 15, wherein the first pattern has:

The first pattern part, the grayscale of the first pattern part is the first grayscale, and the thickness of the metal cations in the first pattern part infiltrated into the shell body is the first thickness; and

The second pattern part, the grayscale of the second pattern part is the second grayscale, the thickness of the metal cations in the second pattern part infiltrated into the housing body is the second thickness, and the second grayscale is greater than the the first grayscale, and the second thickness is greater than the first thickness.
The ceramic housing according to claim 15, wherein the first pattern part is the part with the smallest gray scale in the first pattern, and the range of the first thickness D1 satisfies: 1 μm≤D1≤2 μm; The second pattern part is the part with the largest gray scale in the first pattern, and the range of the second thickness D2 satisfies: 100 μm≤D2≤200 μm.
The ceramic housing according to claim 15, wherein the thickness d1 of the housing body satisfies: 0.35mm≤d1≤0.55mm; the greater the thickness of the housing body, the greater the thickness of the housing body The greater the falling ball strength is; when the thickness of the shell body d1=0.35mm, the average value of the falling ball strength of the shell is 50cm to 55cm; when the thickness d1=0.55mm of the shell body, the shell The average falling ball strength is 85cm to 88cm.
The ceramic casing according to claim 15, wherein the first pattern has a first color, and the casing further has a second pattern, and the second pattern has a second color.
An electronic device, characterized in that the electronic device includes a ceramic housing, and the ceramic housing includes:

a housing body comprising a ceramic material, the housing body having an exterior surface;

The appearance surface reveals a first pattern, wherein the first pattern is presented by metal cations penetrating into the shell body.