CN116801542A

CN116801542A - Ceramic shell, preparation method thereof and electronic equipment

Info

Publication number: CN116801542A
Application number: CN202310773674.4A
Authority: CN
Inventors: 晏刚
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2023-09-22
Also published as: CN114390830B; CN114390830A; WO2023142727A1

Abstract

The application provides a ceramic shell, a preparation method thereof and electronic equipment. The ceramic shell of the embodiment of the application is provided with a rough surface, wherein the rough surface comprises a patterned area, the patterned area is provided with a texture pattern, the rough surface also comprises a non-patterned area, and the non-patterned area is connected with the patterned area; the roughness Ra1 of the patterned region is greater than the roughness Ra2 of the non-patterned region. The ceramic shell of the embodiment of the application has a flashing effect.

Description

Ceramic shell, preparation method thereof and electronic equipment

Technical Field

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

Background

With the development of communication technology, mobile terminals such as mobile phones and tablet computers have become an indispensable tool. When facing to mobile terminal products of the full-scale of the tourmaline, consumers not only need to consider whether the functions of the products meet the requirements of themselves, but also the appearance of the products is one of important factors for controlling whether the consumers purchase the products or not. However, as mobile terminals iterate, the appearance of mobile terminals of various brands gradually tends to be homogenous, and the appearance recognition degree is poor. Ceramics have warm hand feeling and high gloss, and are therefore often used as exterior structural members such as ceramic housings, middle frames, decorative pieces and the like of high-end electronic equipment. However, the appearance is still relatively single at present.

Disclosure of Invention

In view of the foregoing, embodiments of the present application provide a ceramic housing having a flash effect.

An embodiment of the first aspect of the present application provides a ceramic shell having a roughened surface, the roughened surface including a patterned region, the patterned region having a texture pattern, the roughened surface further including a non-patterned region, the non-patterned region being connected to the patterned region; the roughness Ra1 of the patterned region is greater than the roughness Ra2 of the non-patterned region.

An embodiment of the second aspect of the present application provides a method for preparing a ceramic shell, including:

providing a ceramic housing substrate having a surface to be treated;

performing sand blasting treatment on the surface to be treated to obtain an intermediate rough surface; and

patterning the intermediate rough surface to obtain a rough surface, wherein the rough surface is provided with a patterning area, the upper patterning area is provided with a texture pattern, the rough surface further comprises a non-patterning area, and the non-patterning area is connected with the patterning area; the roughness Ra1 of the patterned region is greater than the roughness Ra2 of the non-patterned region.

An embodiment of a third aspect of the present application provides an electronic device, including:

A display assembly;

the ceramic shell is arranged on one side of the display component; and

the circuit board assembly is arranged between the ceramic shell and the display assembly and is electrically connected with the display assembly and used for controlling the display assembly to display.

The ceramic shell provided by the embodiment of the application has a rough surface, so that the surface of the ceramic shell has a matte effect, fingerprints can be prevented from remaining on the surface of the ceramic shell, and the anti-fingerprint effect is achieved. In addition, the rough surface comprises a patterning area and a non-patterning area, the patterning area is provided with a texture pattern, the roughness Ra1 of the patterning area is larger than the roughness Ra2 of the non-patterning area, the patterning area and the non-patterning area are provided with different roughness, so that ceramic crystal grains on the rough surface of the ceramic shell are exposed, a certain included angle is formed between a ceramic crystal boundary and a horizontal plane, when light passes through the ceramic crystal boundary and the ceramic crystal grain surface, an optical path difference exists, a diffraction effect is formed, and a flash point is formed, so that the texture pattern on the ceramic shell shows flash. Therefore, the ceramic shell not only has a matte effect, but also has a low-flash effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a ceramic housing according to an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of a ceramic housing of an embodiment of the application taken along the direction A-A in FIG. 1.

FIG. 3 is a topographical view of patterned areas of a ceramic shell according to one embodiment of the present application.

FIG. 4 is a schematic diagram of a texture pattern according to an embodiment of the present application.

Fig. 5 is an enlarged view of a broken line box I in fig. 2.

FIG. 6 is a schematic diagram of a patterned region according to an embodiment of the application.

FIG. 7 is a topography of a patterned region according to an embodiment of the application.

FIG. 8 is a schematic flow chart of a method for manufacturing a ceramic shell according to an embodiment of the application.

Fig. 9 is a schematic structural diagram of a manufacturing process of a ceramic shell according to an embodiment of the application.

FIG. 10 is a schematic flow chart of a method for preparing a ceramic shell substrate according to an embodiment of the application.

FIG. 11 is a schematic flow chart of a method for preparing a ceramic shell substrate according to another embodiment of the application.

FIG. 12 is a topography of an intermediate roughened surface in accordance with an embodiment of the application.

FIG. 13 is a topographical view of a roughened surface at 1000 x magnification in accordance with an embodiment of the present application.

FIG. 14 is a topography of a roughened surface at 3000 x magnification in accordance with an embodiment of the present application.

FIG. 15 is a topography of a ceramic grain of ceramic cross section.

FIG. 16 is a topography of laser engraving on a high gloss ceramic.

FIG. 17 is a flow chart of laser etching according to an embodiment of the application.

FIG. 18 is a schematic view of a process flow structure for manufacturing a ceramic shell according to another embodiment of the application.

Fig. 19 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 20 is a circuit block diagram of an electronic device according to an embodiment of the application.

Fig. 21 is a schematic view of a partially exploded structure of an electronic device according to an embodiment of the present application.

Fig. 22 is a circuit block diagram of an electronic device of a further embodiment of the application.

Reference numerals illustrate:

100-ceramic shell, 10-rough surface, 11-patterned area, 13-non-patterned area, 131-raised structure, 15-texture pattern, 151-texture part, 1511-arc texture, 152-first texture line, 154-second texture line, 100 '-ceramic shell substrate, 10' -surface to be treated, 10 a-intermediate rough surface, 400-electronic device, 410-display component, 420-middle frame, 430-circuit board component, 431-processor, 433-memory, 450-camera module, 101-light transmission part.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

It should be noted that, for convenience of explanation, like reference numerals denote like components in the embodiments of the present application, and detailed descriptions of the like components are omitted in the different embodiments for brevity.

In order to enable the surface of the ceramic shell to have a matte effect, a matte glaze can be applied to the surface of the ceramic shell, and after the glaze is sintered, the surface is subjected to microcrystal, so that the matte ceramic shell is formed. However, the hardness of the glaze is much lower than that of the ceramic shell, which can greatly reduce the scratch resistance of the ceramic shell.

In addition, the surface of the ceramic shell can be provided with a matte surface by laser carving on the high-gloss ceramic shell and carrying out laser twice on the surface of the ceramic product, so that the surface of the ceramic shell is provided with the matte effect. However, the matte surface formed by the method forms dense laser engraving marks, the step difference between the position of the smooth surface and the position of the laser engraving is large, and the hand feeling is harsh.

In addition, sand blasting can be performed on the surface of the high-gloss ceramic shell by adopting sand blasting equipment to form a matte ceramic shell, but the surface of the matte ceramic shell obtained by sand blasting is matte, so that the visual effect of the ceramic shell is affected.

In view of this, the embodiment of the present application provides a ceramic housing 100, and the ceramic housing 100 of the present application can be applied to portable electronic devices such as mobile phones, tablet computers, notebook computers, desktop computers, smart bracelets, smart watches, electronic readers, game consoles, and the like. The ceramic housing 100 of embodiments of the present application may be a 2D structure, a 2.5D structure, a 3D structure, etc. The ceramic housing 100 of the present application may be a middle frame, a rear cover (battery cover), a decorative member, or the like of an electronic device. In the following embodiments of the present application, the ceramic housing 100 is described in detail by taking a rear cover of a mobile phone as an example, and the present application is not limited to the ceramic housing 100.

Referring to fig. 1 to 3, an embodiment of the present application provides a ceramic shell 100, the ceramic shell 100 has a rough surface 10, the rough surface 10 includes a patterned region 11, the patterned region 11 has a texture pattern 15, and the texture pattern 15 presents a structural color.

The ceramic shell 100 has a rough surface 10, and all surfaces of the ceramic shell 100 are rough surfaces 10; it is also possible that one or more surfaces of the ceramic shell 100 are roughened surfaces 10; it is also possible that a part of one of the surfaces of the ceramic housing 100 is a roughened surface 10.

The rough surface 10 includes a patterned area 11, and the entire rough surface 10 may be the patterned area 11; it is also possible that a part of the surface of the roughened surface 10 is the patterned area 11, i.e. at this time, another part of the surface of the roughened surface 10 does not have the texture pattern 15.

Alternatively, the texture pattern 15 may be, but is not limited to, a strip of texture lines arranged in parallel, an animal pattern, a flower pattern, or the like. The pattern and type of the texture pattern 15 may be designed according to the desired visual effect, and the description and drawings of the present application are merely representations of the texture pattern 15 and should not be construed as limiting the ceramic housing 100 of the embodiment of the present application.

"structural color (Structural Colour)" also known as Physical color, is a luster induced by the wavelength of light. The fine structure of the texture pattern 15 causes light waves to be refracted, diffusely reflected, diffracted, or interfered to generate various colors.

The structural color comprises at least one of red, orange, yellow, green, blue, cyan, violet, and the like. In one embodiment, the structural colors are rainbow seven colors.

The ceramic shell 100 of the embodiment of the application has the rough surface 10, so that the surface of the ceramic shell 100 has a matte effect, and fingerprints can be prevented from remaining on the surface of the ceramic shell 100, and the anti-fingerprint effect is achieved. In addition, the rough surface 10 includes a patterned area 11, the patterned area 11 has a texture pattern 15, the texture pattern 15 presents a structural color, the texture pattern 15 exposes ceramic grains of the rough surface 10, a ceramic grain boundary forms a certain angle with a horizontal plane, when light passes through the ceramic grain boundary and the ceramic grain surface, an optical path difference exists, a diffraction effect is formed, and a colored flash point is formed, so that the texture pattern 15 on the ceramic shell 100 presents a colored flash. Thus, the ceramic housing 100 has not only a matte effect but also a low-flash effect of color. Furthermore, compared with the texture pattern 15 formed on the light surface, the texture pattern 15 is formed on the rough surface, so that the height difference of the area of the texture pattern 15 can be weakened better, the obtained ceramic shell 100 has better hand feeling, in addition, the texture pattern 15 is formed on the rough surface, the visible angle of the seven-color flash obtained on the light surface is limited, and the ceramic shell 100 can see the flash in all directions. Further, the color of the texture pattern 15 is such that a color flash is visually observed due to the structure of the texture pattern 15, and thus, a fading phenomenon does not occur even after a long period of use.

The term "ceramic grain boundaries" refers to the contact areas of differently oriented ceramic grains in a material.

Alternatively, the ceramic housing 100 may comprise a ceramic material; the ceramic housing may also include a ceramic material and a thermoplastic resin. In other words, the ceramic housing 100 may be a ceramic housing formed by sintering a ceramic material; the ceramic shell 100 can also be a nano-crystalline ceramic shell 100 formed by ceramic materials and thermoplastic resins. When the ceramic shell 100 is made of only ceramic material, the hardness is higher, and when the ceramic shell 100 is made of the nanocrystalline ceramic shell 100, the preparation process requirement is relatively low (high-temperature sintering is not needed).

Alternatively, the ceramic shell 100 has a thickness of 0.3mm to 1mm; specifically, the thickness of the ceramic shell 100 may be, but is not limited to, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc. When ceramic shell 100 is too thin, can not fine play support and guard action, and mechanical strength can not fine satisfy electronic equipment ceramic shell 100's requirement, when ceramic shell 100 is too thick, then increase electronic equipment's weight, influence electronic equipment's feel, user experience is not good.

In the embodiments of the present application, when reference is made to the numerical ranges a to b, unless otherwise indicated, all the terms include the end value a and include the end value b. For example, the thickness of the ceramic shell 100 is 0.3mm to 1mm, which means that the thickness of the ceramic shell 100 may be any value between 0.3mm and 1mm, including the end point of 0.3mm and the end point of 1mm.

Alternatively, the raw material components of the ceramic housing 100 may include ceramic powder. Optionally, the ceramic powder comprises at least one of zirconia, alumina, silica, titania, silicon nitride, magnesia, chromia, beryllium oxide, vanadic anhydride, diboron trioxide, spinel, zinc oxide, calcium oxide, mullite, barium titanate. In one embodiment, the ceramic powder is zirconia powder and the ceramic shell 100 is zirconia ceramic shell 100.

In some embodiments, the raw material components of the ceramic shell 100 further include a binder. Optionally, the binder is at least one of epoxy binder and polyether binder. It should be noted that, the decomposition or volatilization temperature of the adhesive is lower than the temperature during the glue discharging, so that the adhesive can be completely removed through decomposition or volatilization during the glue discharging, so that the adhesive residue is avoided, holes remain on the ceramic shell 100 during the sintering process, the mechanical strength of the formed ceramic shell 100 is reduced, the appearance of the ceramic shell 100 is affected, and the like. Optionally, the binder may be present in the range of 3% to 5% by weight of the raw material components of the ceramic shell 100. Specifically, the weight percent of the binder may be, but is not limited to, 3%, 3.5%, 4%, 4.5%, 5%, etc. If the binder content is too small, the ceramic green body is not molded when molding is performed. When the content of the adhesive is too high, the ceramic green body needs longer adhesive discharging time and the adhesive discharging time process is easy to remain air holes in the prepared ceramic shell 100, so that the mechanical performance and the appearance effect of the ceramic shell 100 are affected. When the weight percentage of the adhesive is between 3 and 5 percent, the ceramic green body can be better molded, the adhesive can have proper adhesive discharging time, and residual bubbles of the prepared ceramic shell 100 are avoided.

In some embodiments, the raw material components of the ceramic shell 100 further include a dispersant, where the dispersant is used for the binder and the ceramic powder, and the mixed system is more stable after the binder and the ceramic powder are mixed more uniformly. The dispersant may be, but is not limited to, liquid paraffin or the like. The weight percentage of the dispersant in the raw material composition of the ceramic housing 100 ranges from 1% to 5%, and specifically may be, but is not limited to, 1%, 2%, 3%, 4%, 5%, etc. It should be noted that, the decomposition or volatilization temperature of the dispersing agent is lower than the temperature during the glue discharging, so that the dispersing agent can be completely removed through decomposition or volatilization during the glue discharging, so that the residue of the dispersing agent is avoided, holes remain on the ceramic shell 100 during the sintering process, the mechanical strength of the formed ceramic shell 100 is reduced, the appearance of the ceramic shell 100 is affected, and the like.

In some embodiments, the raw material components of the ceramic shell 100 further include a colorant. The colorant is used to impart a colored pattern or tint to the ceramic shell 100, thereby imparting a colored pattern or tint to the ceramic shell 100, such as the design and tint of blue and white porcelain, etc. By controlling the color and the proportion of the pigment, the ceramic shell 100 can show different appearance effects, so that the ceramic shell 100 shows different appearance effects. Alternatively, the colorant may be an inorganic colorant. Alternatively, the inorganic colorant may be, but is not limited to, iron oxide, cobalt oxide, manganese oxide, and the like. The weight percentage of the coloring material in the raw material component of the ceramic shell 100 ranges from 3% to 10%, and specifically may be, but is not limited to, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.

In some embodiments, when the ceramic shell 100 is a nanocrystalline ceramic shell 100, the original components of the ceramic shell 100 further include a thermoplastic resin, which may be, but is not limited to, at least one of polyphenylene sulfide, polysulfone, polyethersulfone, polyetherketone, polycarbonate, polyamide, polymethyl methacrylate, and the like. The nano-alloy ceramic shell 100 can be obtained by performing green forming through casting, injection molding, compression molding and other forming modes, and then performing heat treatment, temperature isostatic pressing and other processes.

Optionally, the ceramic shell 100 has at least one color. Further, the ceramic housing 100 has at least two colors. Specifically, the ceramic housing 100 may have 1, 2, 3, 4, 5, 6, 7, 8, etc. This may provide the ceramic housing 100 with a color pattern. Alternatively, the ceramic housing 100 may have at least one of red, white, gray, blue, orange, yellow, green, purple, pink, etc. The color of the ceramic shell 100 is different from the structural color of the texture pattern after the coloring material is added to the ceramic shell 100. The ceramic case 100 of the present application can exhibit a low-sparkle effect even when it is a transparent ceramic case (no coloring material is added) or a light-color system color such as white, and has the texture pattern 15 according to the embodiment of the present application.

Alternatively, the average particle diameter d of the ceramic powder is in the range of 0.2 μm.ltoreq.d.ltoreq.0.8. Mu.m. Specifically, the average particle diameter of the ceramic powder may be, but is 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, so that the preparation difficulty is increased, the cost is increased, and when the particle size of the ceramic powder is as small as nano-scale, the ceramic powder is easy to agglomerate to form large particles, so that the mechanical strength of the prepared ceramic shell 100 is reduced; if the particle size of the ceramic powder is too large, for example, more than 0.8 μm, gaps and bubbles tend to remain during green molding, and the mechanical strength of the ceramic shell 100 produced is also lowered. Therefore, when the particle size of the ceramic powder ranges from 0.2 μm to 0.8 μm, the ceramic shell 100 can be manufactured with good mechanical strength and low manufacturing cost. The "average particle size" refers to the average value of all particle sizes of the ceramic powder.

Alternatively, the vickers hardness of the ceramic shell 100 of the present application may be, but is not limited to, 1200HV to 1400HV. Specifically, it may be, but is not limited to, 1200HV, 1230HV, 1250HV, 1280HV, 1300HV, 1320HV, 1350HV, 1380HV, 1400HV, etc. The higher the vickers hardness of the ceramic shell 100, the higher the hardness of the resulting ceramic shell 100.

In some embodiments, the roughened surface 10 is patterned, in other words, the roughened surface 10 includes only patterned areas 11. In other embodiments, the roughened surface 10 further comprises non-patterned areas 13, the non-patterned areas 13 being connected to the patterned areas 11, i.e. the roughened surface 10 comprises patterned areas 11 and non-patterned areas 13.

In some embodiments, since the patterned region 11 is formed after the patterning pattern 15 is formed by laser engraving based on the surface microstructure of the non-patterned region 13, the roughness Ra1 of the patterned region 11 is greater than the roughness Ra2 of the non-patterned region 13. After laser carving, ceramic crystal grains of the ceramic are exposed, the ceramic crystal grain boundary and the horizontal plane form a certain included angle, when light passes through the ceramic crystal grain boundary and the surface of the ceramic crystal grain, an optical path difference exists, and a diffraction effect is formed, so that the glossiness G1 of the patterned area 11 is larger than the glossiness G2 of the non-patterned area 13.

Alternatively, the roughness Ra1 of the patterned region 11 is in the range of 0.05 μm.ltoreq.Ra1.ltoreq.1.0 μm. Further, the roughness Ra1 of the patterned region 11 is in the range of 0.6 μm.ltoreq.Ra1.ltoreq.0.8 μm. Specifically, the roughness Ra1 of the patterned region 11 may be, but is not limited to, 0.05 μm, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1.0 μm, etc. If the roughness of the patterned region 11 is too small, such as less than 0.05 μm, the patterned region 11 approaches the high optical surface effect, and cannot form the low flash effect; the roughness of the patterned area 11 is too high, the hand-held touch feeling is poor, dirt is easily hidden on the surface of the patterned area 11, which is not beneficial to cleaning, and in addition, the roughness is too large, which is difficult to show a flashing effect.

Alternatively, the glossiness G1 of the patterned region 11 is in the range of 3 Gu.ltoreq.G1.ltoreq.30Gu (60℃angle test). Further, the glossiness G1 of the patterned region 11 is in the range of 3.5 Gu.ltoreq.G1.ltoreq.8.5 Gu. Specifically, the glossiness G1 of the patterned region 11 may be, but is not limited to, 3Gu, 5Gu, 8Gu, 10Gu, 15Gu, 17Gu, 20Gu, 23Gu, 25Gu, 28Gu, 30Gu, etc. When the glossiness of the patterned area 11 is lower than 3Gu, the surface of the obtained ceramic shell 100 is dull and matt, which affects the visual effect of the ceramic shell 100, and when the glossiness of the patterned area 11 is higher than 30Gu, the glossiness is too high, which is unfavorable for forming a low-flash color texture on the surface of the ceramic shell 100. When the average glossiness of the rough surface 10 is in this range, the ceramic shell 100 can be formed with a matte and low-flash color texture pattern 15 while having a certain glossiness, thereby having better texture and visual effect.

Optionally, the non-patterned region 13 has a roughness Ra2 in the range of 0.04 μm.ltoreq.Ra2.ltoreq.0.8 μm; in other words, the range of the roughness Ra2 of the surface before the patterning treatment is 0.04 μm.ltoreq.Ra2.ltoreq.0.8 μm. Further, the non-patterned region 13 has a roughness Ra2 in the range of 0.2 μm.ltoreq.Ra2.ltoreq.0.6 μm. Specifically, the roughness Ra2 of the non-patterned region 13 may be, but is not limited to, 0.04 μm, 0.08 μm, 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm. If the roughness of the non-patterned region 13 is too small, such as less than 0.04 μm, the non-patterned region 13 approaches to the high optical surface effect, and after laser engraving is performed to form the patterned region 11, a low-flash effect cannot be formed; the non-patterned region 13 has a too high roughness, which is not good in hand touch feeling, and is easy to collect dirt on the surface of the patterned region 11, which is not beneficial to cleaning, and in addition, has a too large roughness, and is difficult to present a flashing effect after laser etching.

Optionally, the non-patterned region 13 has a gloss G2 (60℃angle test) in the range 2.0 Gu.ltoreq.G2.ltoreq.20Gu. In other words, the range of the glossiness G2 of the surface before patterning treatment is 2.0 Gu.ltoreq.G2.ltoreq.20Gu. Further, the range of the glossiness G2 of the non-patterned area 13 is 2.0 Gu.ltoreq.G2.ltoreq.6.5 Gu. Specifically, the glossiness of the non-patterned region 13 may be, but is not limited to, 2.0Gu, 4Gu, 6Gu, 8Gu, 10Gu, 12Gu, 14Gu, 16Gu, 18Gu, 20Gu, etc. When the average glossiness of the roughened surface 10 before patterning is too low, the surface of the ceramic shell 100 obtained is dull and matt, which affects the visual effect of the ceramic shell 100, and when the glossiness of the roughened surface 10 before patterning is too high, the glossiness is too high, which is unfavorable for forming a low-sparkle color texture on the surface of the ceramic shell 100. When the average glossiness of the rough surface 10 is in this range, the ceramic shell 100 can be formed with a matte and low-flash color texture pattern 15 while having a certain glossiness, thereby having better texture and visual effect.

Referring to fig. 4, in some embodiments, the texture pattern 15 includes a plurality of texture portions 151, the texture portions 151 have linear concave structures, a bottom wall of each texture portion 151 has a plurality of arc textures 1511, the plurality of arc textures 1511 are sequentially arranged along an extending direction of the texture portion 151, openings of the plurality of arc textures 1511 face the same direction, and curvatures of at least some of the plurality of arc textures 1511 are equal. This causes the bottom wall of the textured portion 151 to have a multi-layered structure composed of a plurality of arc-shaped textures 1511 with uneven levels, and when visible light is incident on the textured portion 151, multiple refraction occurs between the multi-layered structures (ceramic grain boundaries/ceramic grains/ceramic grain boundaries), thereby forming a color flash effect resembling a light diffraction pattern.

The texture pattern 15 includes a plurality of texture portions 151, and the texture portions 151 may be extended and arranged according to a predetermined rule to form the texture pattern 15, in other words, the texture pattern 15 is formed by arranging the texture portions 151 along the predetermined rule. The plurality of arc textures 1511 are opened toward the same side, and may be curved toward the same side for the plurality of arc textures 1511.

The curvatures of at least some of the plurality of arc textures 1511 are equal, and may be equal for all of the plurality of arc textures 1511, or may be one curvature for some of the arc textures 1511, and another different curvature for another part of the arc textures 1511.

Alternatively, the texture portion 151 is a concave portion, and the texture pattern 15 is a concave texture pattern 15. The concave grain pattern 15 may be formed by an engraving process such as laser engraving.

In one embodiment, the texture portion 151 is a linear texture, the linear texture includes a plurality of dot textures, the plurality of dot textures are sequentially arranged, and any two adjacent texture portions 151 are partially overlapped to form a structure having a plurality of arc textures 1511 sequentially arranged. By superimposing a plurality of dot textures, the slave layer has a multi-layered texture portion 151 having a rugged structure, so that the texture pattern 15 exhibits a colorful structural color, thereby having a color flash effect.

In some embodiments, the arcuate texture 1511 is semi-arcuate, with a radius of curvature of the arcuate texture 1511 between 5 μm and 50 μm; in particular, the radius of curvature of the arcuate texture 1511 may be, but is not limited to, 5 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm.

Referring to FIG. 5, in some embodiments, the shortest distance w1 of the orthographic projection of the texture portion 151 on the rough surface 10 is in the range of 10 μm.ltoreq.w1.ltoreq.100 μm. In other words, the minimum width of the orthographic projection of the textured portion 151 on the roughened surface 10 is in the range of 10 μm.ltoreq.w1.ltoreq.100 μm. In other words, the length of the arc-shaped texture 1511 ranges from 10 μm to w1 to 100 μm in the extending direction perpendicular to the texture portion 151. Further, the shortest distance w1 of the orthographic projection of the textured portion 151 on the rough surface 10 is in the range of 60 μm.ltoreq.w1.ltoreq.80 μm. Specifically, the shortest distance w1 of the orthographic projection of the texture portion 151 on the rough surface 10 may be, but is not limited to, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 62 μm, 64 μm, 68 μm, 70 μm, 72 μm, 74 μm, 78 μm, 80 μm, 90 μm, 100 μm, etc.

It should be understood that when the textured portion 151 is a linear texture, the shortest distance w of the orthographic projection of the textured portion 151 on the rough surface 10 is the line width of the textured portion 151, that is, the line width of the textured portion 151 is 10 μm and w1 and 100 μm, and further, the line width of the textured portion 151 may be 60 μm and w1 and 80 μm.

In some embodiments, the depth h1 of the textured portion 151 is in the range of 1 μm.ltoreq.h1.ltoreq.50 μm in a direction perpendicular to the roughened surface 10. Further, the depth h1 of the textured portion 151 in the direction perpendicular to the roughened surface 10 is in the range of 4 μm.ltoreq.h1.ltoreq.15 μm. Still further, the depth h1 of the textured portion 151 in the direction perpendicular to the roughened surface 10 is in the range of 10 μm.ltoreq.h1.ltoreq.15 μm. Specifically, h1 may be, but is not limited to, 1 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm. The depth of the texture part 151 is too shallow to form a multi-layered structure having a plurality of arc textures 1511, affecting the color flash effect of the ceramic case 100; in the laser etching process, the ceramic may generate micro cracks, and the depth of the texture portion 151 is too deep, which may affect the strength of the ceramic housing 100.

Referring to fig. 6 and 7, in an embodiment, the texture parts 151 include a plurality of first texture lines 152 and a plurality of second texture lines 154, that is, the texture pattern 15 includes a plurality of first texture lines 152 and a plurality of second texture lines 154, the first texture lines 152 intersect with the second texture lines 154, the plurality of first texture lines 152 extend along a first direction and are arranged along a second direction, the plurality of first texture lines 152 are parallel to each other, a line width of the first texture lines 152 is 60 μm to 80 μm, and a distance between any two adjacent first texture lines 152 is 60 μm to 80 μm; the plurality of second texture lines 154 extend along the second direction, are arranged along the first direction, the plurality of second texture lines 154 are parallel to each other, the line width of each second texture line 154 is 60 μm to 80 μm, and the distance between any two adjacent second texture lines 154 is 60 μm to 80 μm. Optionally, the first texture line 152 is perpendicular to the second texture line 154. This can result in a relatively uniform seven-color flash across the patterned area 11.

Referring again to fig. 2, in some embodiments, the non-patterned region 13 has a plurality of closely spaced bump structures 131. In other words, the bump structures 131 are closely arranged such that the non-patterned areas 13 form the roughened surface 10.

Referring again to FIG. 5, alternatively, the maximum height h2 of the raised structures 131 may range from 10 μm.ltoreq.h2.ltoreq.23 μm in a direction perpendicular to the roughened surface 10. In other words, the level difference of the rough surface 10 (the non-patterned region 13) ranges from 10 μm to 23 μm. Specifically, h2 may be, but is not limited to, 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm, 22 μm, 23 μm, etc. When the maximum height h2 of the bump structure 131 is smaller than 10 μm, the non-patterned region 13 approaches to the high-light mirror effect, and after laser etching is performed to form the patterned region 11, a low-flash effect cannot be formed; when the maximum height h2 of the bump structure 131 is higher than 23 μm, the roughness of the non-patterned region 13 is too high, so that the touch feeling is poor, dirt is easily hidden on the surface of the patterned region 11, which is not beneficial to cleaning, and in addition, the roughness is too large, so that a flash effect is difficult to appear after laser etching.

Optionally, the maximum distance w2 of the orthographic projection of the convex structures 131 on the rough surface 10 is in the range of 4 μm.ltoreq.w2.ltoreq.28 μm. In other words, the maximum width w2 of the bump structure 131 is in the range of 4 μm.ltoreq.w2.ltoreq.28μm. Specifically, w2 may be, but is not limited to, 4 μm, 6 μm, 8 μm, 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 26 μm, 28 μm, etc.

Referring to fig. 8 and 9, an embodiment of the present application further provides a method for preparing a ceramic shell 100, which includes:

s201, providing a ceramic housing substrate 100', the ceramic housing substrate 100' having a surface 10' to be treated;

s202, carrying out sand blasting treatment on the surface 10' to be treated to obtain an intermediate rough surface 10a; and

s203, performing patterning treatment on the intermediate rough surface 10a to obtain a rough surface 10, wherein the rough surface 10 is provided with a patterning area 11, and the patterning area 11 is provided with a texture pattern 15, and the texture pattern 15 presents a structural color.

The same features of the present embodiment as those of the foregoing embodiment are referred to the description of the corresponding features of the foregoing embodiment, and will not be repeated herein.

According to the preparation method, the surface 10' to be treated of the ceramic shell substrate 100' is subjected to sand blasting treatment to form the intermediate rough surface 10a on the ceramic shell substrate 100', and the intermediate rough surface 10a enables the surface of the ceramic shell 100 to have a matte effect, can prevent fingerprints from remaining on the surface of the ceramic shell 100, and has an anti-fingerprint effect. Then, patterning is performed on the intermediate rough surface 10a to form a texture pattern 15, the texture pattern 15 presents structural color, the patterning exposes ceramic grains on the surface of the ceramic shell 100, the ceramic grain boundary forms a certain included angle with the horizontal plane, when light passes through the ceramic grain boundary and the ceramic grain surface, an optical path difference exists, a diffraction effect is formed, and a colorful flash point is formed, so that the texture pattern 15 on the ceramic shell 100 presents colorful flash. Thus, the resulting ceramic shell 100 has not only a matte effect but also a low flash effect in color. Compared with the patterning process performed on the light surface, the patterning process performed on the intermediate rough surface 10a in the preparation method of the present application can better weaken the height difference of the area of the texture pattern 15, so that the obtained ceramic shell 100 has better hand feeling. Also, the visible angle of the seven-colored flash light obtained by patterning the light surface is limited, and the manufacturing method of the present application performs patterning on the intermediate rough surface 10a, so that the ceramic shell 100 can see the flash light in all directions. Further, the color of the texture pattern 15 is such that a color flash is visually observed due to the structure of the texture pattern 15, and thus, a fading phenomenon does not occur even after a long period of use.

Referring to fig. 10, in some embodiments, in step S201, the providing a ceramic housing substrate 100' includes:

s2011, mixing ceramic powder with a binder, and granulating to obtain granules;

specifically, ceramic powder and a binder are respectively weighed according to a preset weight ratio, the ceramic powder and the binder are uniformly mixed, and granulation is carried out by adopting granulation equipment to obtain granules. For the detailed description of the ceramic powder, please refer to the description of the corresponding parts of the above embodiments, and the description is omitted herein. When the raw material components of the ceramic shell substrate 100' further include a dispersant, a coloring material, and the like, the preparation method further includes mixing the dispersant, the coloring material, and the like with the ceramic powder and the binder before granulating.

Optionally, the mesh number of the pellet ranges from 40 mesh to 100 mesh. Specifically, the mesh number of the pellets may be, but is 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 pellets ranges from 150 μm to 380 μm; specifically, the particle size of the pellet may be, but is 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 granules is too small, increasing the preparation difficulty, thereby increasing the cost, and when the particle size of the granules is as small as nano-scale, the granules are easy to agglomerate to form large particles, and the mechanical strength of the prepared ceramic shell 100 can be reduced; when the particle size of the pellets is too large, for example, more than 0.8 μm, gaps and bubbles tend to remain during green molding, and the mechanical strength of the ceramic shell 100 produced is also lowered. Therefore, when the particle diameter of the pellet ranges from 0.2 μm to 0.8 μm, the ceramic shell 100 can be produced with both good mechanical strength and low production cost.

Alternatively, the pellets have a BET specific surface area of 6m ² /g to 10m ² And/g. In particular, the BET specific surface area of the pellets may be, but is 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 granules, which are easily agglomerated to form large particles, and the mechanical strength of the ceramic shell 100 is reduced; the smaller the specific surface area, the larger the pellet, which tends to leave gaps and bubbles during green molding, and also reduces the mechanical strength of the ceramic shell 100 produced.

Optionally, the weight percent of binder in the pellet ranges from 3% to 5%. For a detailed description of the ceramic powder and the binder, please refer to the description of the corresponding parts of the above embodiments.

S2012, molding with the pellets to obtain a green body; and

optionally, the pellet is molded by at least one of molding processes such as compression molding, injection molding, casting molding, and the like, to obtain the green body.

In one embodiment, the molding is performed using a compression molding process, the molding using the pellets to obtain a green body, comprising: and (3) performing compression molding at normal temperature under the compression molding pressure ranging from 10MPa to 15MPa, and maintaining the pressure for 10s to 20s to obtain a green body.

Alternatively, the range of the pressure of the compression molding may be 10MPa, 11MPa, 12MPa, 13MPa, 14MPa, 15MPa, or the like. The pressure of the mold pressing is too small to affect the compactness of the obtained green body, even the green body with a complete appearance cannot be formed, and the larger the pressure of the mold pressing is, the more compact the green body is formed, which is beneficial to improving the mechanical properties of the prepared ceramic shell substrate 100', but the too large the pressure of the mold pressing is, and the requirements of equipment are improved.

Alternatively, the dwell time may be 10s, 12s, 14s, 16s, 18s, 20s, etc. The longer the dwell time, the better the compactness and the shaping condition of the green body formed, but the longer the dwell time, the more the production efficiency is affected.

In other embodiments, the pellets may also be placed in an injection molding machine and injection molded to produce green bodies.

In still other embodiments, the raw material components of the ceramic shell substrate 100' are mixed to form a slurry, and cast using a casting machine to form a green body. When casting is performed by casting molding, granulation is not required for producing a green body.

And S2013, discharging glue from the green body, and performing second sintering to obtain the ceramic shell substrate 100'.

Optionally, the green body is subjected to gradual heating to 800-950 ℃ for glue discharging, wherein the glue discharging time ranges from 2h to 3h, so that the adhesive in the green body is discharged in a volatilization or decomposition mode; and performing a second sintering at 1350 ℃ to 1500 ℃ under normal pressure, wherein the second sintering time ranges from 8 hours to 10 hours. When the raw material components of the ceramic housing 100 further include a dispersant, the dispersant is decomposed or volatilized at the time of discharging the paste, thereby being excluded.

Alternatively, the temperature of the paste ejection is 800 to 950 ℃, and specifically, may be, but not limited to, 800 ℃, 820 ℃, 840 ℃, 860 ℃, 880 ℃, 900 ℃, 920 ℃, 940 ℃, 950 ℃, and the like. The temperature of the adhesive is too low, so that the adhesive removing time is too long, the production efficiency is affected, even the adhesive cannot be completely removed, air holes are left on the ceramic shell 100 when sintering is easily performed, the mechanical strength of the obtained ceramic shell 100 is affected, the adhesive is too high in temperature, the adhesive is decomposed or volatilized too severely, bubbles are easily remained in a blank body, the mechanical strength of the prepared ceramic shell 100 is affected, in addition, the adhesive removing temperature is too high, ceramic may be crystallized too early, and the mechanical strength of the ceramic shell 100 is also reduced.

Optionally, the time for discharging the glue is 2 to 3 hours, and specifically, may be, but not limited to, 120min, 130min, 140min, 150min, 160min, 170min, 180min, etc. If the time for discharging the glue is too short, the glue is not completely discharged, so that bubbles are easy to remain in the prepared ceramic shell 100, and the time for discharging the glue is too short, thereby influencing the production efficiency.

Optionally, the temperature of the second sintering ranges from 1350 ℃ to 1500 ℃; specifically, it may be, but is not limited to, 1350 ℃, 1380 ℃, 1400 ℃, 1420 ℃, 1450 ℃, 1480 ℃, 1500 ℃, and the like. The second sintering temperature is too low and ceramic shell 100 is not ceramic; too high a temperature of the second sintering may easily cause excessive firing, affecting the mechanical strength of the resulting ceramic shell 100.

Optionally, the time of the second sintering ranges from 8h to 10h; specifically, it may be, but is not limited to, 8h, 8.5h, 9h, 9.5h, 10h, etc. The sintering time of the green body is too long, ceramic grains are easy to grow too much, the mechanical strength of the ceramic shell 100 is not improved, the sintering time of the green body is too short, the compactness between ceramic powder is insufficient, insufficient ceramic formation is easy to exist, and the mechanical strength of the prepared ceramic shell 100 is also affected.

Referring to fig. 11, in some embodiments, in step S201, the providing a ceramic housing substrate 100' includes:

s2011a, mixing ceramic powder with a binder, and granulating to obtain granules;

s2012a, molding with the pellets to obtain a green body;

s2013a, discharging the green body, performing second sintering, and

for the detailed description of S2011a to S2013a, please refer to the description of the corresponding parts of the above embodiments, and the detailed description is omitted herein.

S2014a, machining (CNC machining) and first polishing are performed to obtain the ceramic housing substrate 100'.

Optionally, the surface of the sintered sample is machined and then subjected to a lapping (i.e., first polishing) process to obtain the ceramic housing substrate 100' in a high-gloss state.

Alternatively, the roughness Ra3 of the ceramic shell substrate 100' ranges from 5nm to 25nm, and in particular, may be, but is not limited to, 5nm, 8nm, 10nm, 13nm, 15nm, 18nm, 20nm, 23nm, 25nm, etc.

Alternatively, the surface of the ceramic shell substrate 100' has a gloss (60 ° angle test) of 130GU to 160GU. Specifically, the glossiness of the ceramic housing substrate 100' may be, but is not limited to, 130Gu, 135Gu, 140Gu, 145Gu, 150Gu, 155Gu, 160Gu, etc.

In some embodiments, in step S202, the performing sand blasting on the surface to be treated 10' to obtain an intermediate rough surface 10a includes:

the surface 10' to be treated is sandblasted with sand particles having a mesh size of 100 mesh to 5000 mesh by a sandblasting apparatus under a sandblasting pressure ranging from 0.1MPa to 10MPa to obtain an intermediate rough surface 10a, and a topography of the intermediate rough surface 10a is shown in fig. 12. The surface of the high-gloss ceramic shell substrate 100 'is subjected to sand blasting, and the intermediate rough surface 10a with a plurality of raised structures 131 can be formed on the surface of the ceramic shell substrate 100', so that the intermediate rough surface 10a presents a matte effect, and the height difference of the area of the texture pattern 15 after patterning treatment can be reduced, so that the obtained ceramic shell 100 has better hand feeling.

Optionally, the intermediate roughened surface 10a has a plurality of closely spaced raised structures 131. The roughness of the intermediate rough surface 10a is in the range of 0.04 μm or less and Ra2 or less than 0.8 μm, and the glossiness G2 of the intermediate rough surface 10a is in the range of 2.0Gu or less and G2 or less and 20Gu. For a detailed description of the protrusion structure 131, please refer to the corresponding parts of the above embodiments, and the detailed description is omitted herein.

Optionally, the sand grains comprise at least one of SiC sand, corundum sand, zirconia sand, and quartz sand. In one embodiment, the sand grain is corundum sand, the corundum sand has higher hardness, and the corundum sand is not easy to break in the sand blasting process.

Optionally, the shape of the sand grains includes at least one of a sphere shape and a pyramid shape. Compared with the pyramid shape, the intermediate rough surface 10a obtained by adopting the sand blasting treatment of spherical sand grains is smoother and better in hand feeling.

The mesh number of the sand grains is 100 to 5000. Further, the mesh number of the sand grains is 800 mesh to 1500 mesh. Specifically, the mesh number of the sand grains may be, but is not limited to, 100 mesh, 300 mesh, 500 mesh, 800 mesh, 1000 mesh, 1100 mesh, 1200 mesh, 1500 mesh, etc. The mesh number of the sand grains is too large, the grain size of the sand grains is small, the roughness of the obtained intermediate rough surface 10a is small and is close to the high-light mirror effect, and the low-flash effect cannot be formed after laser etching is performed to form the patterned area 11; the mesh number of sand grains is small, the grain size of the sand grains is large, the roughness of the obtained intermediate rough surface 10a is large, the hand-held touch feeling is poor, dirt is easy to be hidden on the surface of the patterning area 11, cleaning is not facilitated, in addition, the roughness is too large, and a flashing effect is difficult to be displayed after laser etching.

The pressure of the blasting is in the range of 0.1MPa to 10MPa. Further, the blasting pressure ranges from 0.6MPa to 1.2MPa. Specifically, the mesh number of the sand grains may be, but is not limited to, 0.1MPa, 0.3MPa, 0.6MPa, 0.8MPa, 1MPa, 1.2MPa, 2MPa, 4MPa, 6MPa, 8MPa, 10MPa, etc. The sand blasting pressure is too high, so that ceramic fragments are easily generated on the surface of the ceramic shell substrate 100', and the sand blasting pressure is too low, so that the production time is prolonged, and the production efficiency is reduced.

In some embodiments, the blasting apparatus comprises a nozzle, and the perpendicular distance of the nozzle from the surface to be treated 10' is in the range of 10cm to 50cm when the blasting is performed. Further, the vertical distance between the nozzle and the surface 10' to be treated is in the range of 25cm to 35cm when the blasting is performed. Specifically, the perpendicular distance between the nozzle and the surface to be treated 10' in the sand blasting treatment may be, but is not limited to, 10cm, 15cm, 20cm, 25cm, 30cm, 35cm, 40cm, 45cm, 50cm, etc. Too close a distance between the nozzle and the surface to be treated 10' is easy to generate ceramic fragments on the surface of the ceramic shell substrate 100', and too far a distance between the nozzle and the surface to be treated 10' is easy to generate, so that the production time is prolonged, and the production efficiency is reduced.

In some embodiments, in step S203, the patterning the intermediate rough surface 10a to obtain the rough surface 10 includes: the intermediate rough surface 10a is patterned with a laser to obtain a rough surface 10.

Further, in step S203, the patterning the intermediate rough surface 10a to obtain a rough surface 10 includes: and carrying out laser carving on the intermediate rough surface 10a by adopting an infrared nanosecond laser with the wavelength of 1000nm to 1300nm so as to form a texture pattern 15 on the intermediate rough surface 10a, thereby obtaining the rough surface 10. The topography of the roughened surface 10 after laser engraving is shown in fig. 13 and 14.

When laser is used for laser engraving, the laser spots are usually circular spots, each circular spot is struck on the intermediate rough surface 10a, a plurality of similar U-shaped upper grooves (the cylindrical bottom is in a semicircular structure) are formed on the intermediate rough surface 10a, and when ceramic grains of the ceramic shell 100 are exposed (for example, ceramic grains, a ceramic grain morphology diagram is shown in fig. 15), when continuous laser engraving is performed by using laser, lines composed of the overlapped U-shaped grooves are formed, so that a plurality of arc-shaped textures 1511 which are sequentially arranged along the extending direction of the lines are formed on the bottom wall of the formed texture pattern 15, the openings of the plurality of arc-shaped textures 1511 face the same, the texture pattern 15 has a multi-layer structure with uneven height, and when visible light is incident on the texture portion 151, multiple refraction is generated between the multi-layer structure (ceramic grain boundary/ceramic grain boundary), so that a color flash effect similar to a light diffraction pattern is formed. Because go on having the roughness of protruding structure 131 when radium carving, consequently, radium carving forms arc texture 1511 can be obstructed by protruding structure 131, forms the arc texture 1511 that is broken, and the size of arc texture 1511 is very little, consequently adopts current equipment to be difficult to take the picture that has clear arc texture 1511. Fig. 16 is a topography obtained by laser engraving with an infrared nanosecond laser on the surface of the high-gloss ceramic, and the topography can clearly see the arc textures 1511 which are arranged in sequence. Laser engraving was performed on the high-gloss ceramic surface to give a ceramic shell with high-flash seven-color flash, but with limited flash visibility, and the texture portion 151 of the texture pattern 15 obtained from both fig. 16 and the obtained seven-color flash can be used to verify the scheme of the present application has a plurality of arc textures 1511. For detailed descriptions of the texture portion 151 and the arc-shaped texture 1511, please refer to the descriptions of the corresponding portions of the above embodiments, and the detailed descriptions are omitted here.

Alternatively, the wavelength of the infrared nanosecond laser ranges from 1000nm to 1300nm; specifically, it may be, but is not limited to, 1000nm, 1050nm, 1100nm, 1150nm, 1200nm, 1250nm, 1300nm, etc.

In some embodiments, the infrared nanosecond laser has a spot diameter in the range of 10 μm to 100 μm. Specifically, the spot diameter may be, but is not limited to, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 62 μm, 64 μm, 68 μm, 70 μm, 72 μm, 74 μm, 78 μm, 80 μm, 90 μm, 100 μm, etc.

In some embodiments, the speed of laser engraving ranges from 800mm/s to 1500mm/s. In particular, the speed of laser engraving may be, but is not limited to, 800mm/s, 900mm/s, 1000mm/s, 1100mm/s, 1200mm/s, 1300mm/s, 1400mm/s, 1500mm/s, etc. The laser etching speed is too low, so that the production efficiency is affected; the jump wire easily occurs when the laser carving speed is too high, namely, the light spots cannot work uniformly and continuously, the obtained texture pattern 15 is affected, and even the obtained texture pattern 15 has no color flash effect.

In some embodiments, the frequency of laser engraving ranges from 40KHz to 300KHz. In particular, the frequency of laser engraving may be, but is not limited to, 40KHz, 70KHz, 100KHz, 150KHz, 200KHz, 250KHz, 300KHz, etc.

In some embodiments, the output power of laser etching ranges from 6W to 24W. Specifically, the output power of laser engraving may be, but is not limited to, 6W, 10W, 12W, 15W, 18W, 20W, 22W, 24W, etc. Too high an output power of laser engraving would result in too deep texture, affecting the strength of the ceramic housing 100. If the output power of laser etching is too small, the obtained texture is too shallow, and it is difficult to form a multi-layer structure with a plurality of arc textures 1511, which affects the color flash effect of the ceramic housing 100.

Referring to fig. 17, in an embodiment, the laser engraving is performed on the intermediate rough surface 10a by using an infrared nanosecond laser with a wavelength of 1000nm to 1300nm to form a texture pattern 15 on the intermediate rough surface 10a, which includes:

s2031, performing first laser etching on the intermediate rough surface 10a by adopting infrared nanosecond laser with the wavelength of 1000nm to 1300nm to form a plurality of first texture lines 152 on the intermediate rough surface 10a, wherein the first texture lines 152 are mutually parallel, the line width of each first texture line 152 is 60 mu m to 80 mu m, and the distance between any two adjacent first texture lines 152 is 60 mu m to 80 mu m; and

s2032, performing second laser etching on the intermediate rough surface 10a by using an infrared nanosecond laser with a wavelength of 1000nm to 1300nm to form a plurality of second texture lines 154 on the intermediate rough surface 10a, wherein the second texture lines 154 are parallel to each other, the line width of each second texture line 154 is 60 μm to 80 μm, and the interval between any two adjacent second texture lines 154 is 60 μm to 80 μm; the first texture lines 152 and the second texture lines 154 form a texture pattern 15, and the texture pattern 15 presents a structural color.

Referring to fig. 18, an embodiment of the present application further provides a method for preparing a ceramic shell 100, which includes:

s301, providing a ceramic shell substrate 100', the ceramic shell substrate 100' having a surface 10' to be treated;

s302, carrying out sand blasting treatment on the surface 10' to be treated to obtain an intermediate rough surface 10a;

s303, performing patterning treatment on the intermediate rough surface 10a to obtain a rough surface 10, wherein the rough surface 10 is provided with a patterning area 11, the patterning area 11 is provided with a texture pattern 15, and the texture pattern 15 presents a structural color; and

the detailed descriptions of step S301 to step S303 are referred to the descriptions of the corresponding feature parts of the above embodiments, and are not repeated here.

S304, annealing treatment is carried out.

Optionally, the ceramic shell 100 is annealed in an annealing furnace at 750 ℃ to 850 ℃ for 2 hours to 5 hours to eliminate grey appearing on the surface of the ceramic shell. After laser etching, the energy of laser etching can cause oxygen atoms in oxides such as zirconium dioxide in the ceramic shell 100 to transition to form oxygen vacancies, thereby exhibiting gray color; the annealing can supplement oxygen vacancies and restore the original state, thereby eliminating grey generated after laser engraving.

Alternatively, when the ceramic shell 100 is black or another darker color, the annealing process may not be performed. Because the black color masks the gray color, the effect of the gray color presented by the oxygen vacancies after laser engraving on the color of the ceramic shell 100 can be weakened.

Alternatively, the temperature of the annealing may be any temperature between 750 ℃ and 850 ℃, and in particular, but not limited to, 750 ℃, 760 ℃, 770 ℃, 780 ℃, 790 ℃, 800 ℃, 810 ℃, 820 ℃, 830 ℃, 840 ℃, 850 ℃. When the annealing temperature is less than 750 ℃, oxygen vacancies in the ceramic shell 100 cannot be fully supplemented, grey generated after laser etching is difficult to eliminate, the appearance effect of the ceramic shell 100 is affected, and when the annealing temperature is higher than 850 ℃, ceramic grains grow excessively, and the mechanical strength of the ceramic shell 100 is affected.

Alternatively, the time of annealing may be any value between 2h and 5h, and specifically may be, but is not limited to, 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 5h, etc. When the annealing time is less than 2 hours, oxygen vacancies in the ceramic shell 100 are not fully supplemented for a sufficient time, grey generated after laser etching is difficult to eliminate, and when the annealing time is more than 5 hours, the production efficiency is reduced, and the cost is increased.

The detailed description of the same features of the present embodiment as those of the above embodiment is referred to the above embodiment, and will not be repeated here.

Referring to fig. 19 and 20, an embodiment of the present application further provides an electronic device 400, which includes: display assembly 410, ceramic housing 100 according to an embodiment of the present application, and circuit board assembly 430. The display component 410 is for display; the ceramic housing 100 is disposed at one side of the display assembly 410; the circuit board assembly 430 is disposed between the display assembly 410 and the ceramic housing 100, and is electrically connected to the display assembly 410, for controlling the display assembly 410 to display.

The electronic device 400 according to the embodiment of the present application may be, but is not limited to, a portable electronic device such as a mobile phone, a tablet computer, a notebook computer, a desktop computer, a smart band, a smart watch, an electronic reader, a game console, and the like.

For a detailed description of the ceramic housing 100, please refer to the corresponding parts of the above embodiments, and the detailed description is omitted herein.

Alternatively, the display assembly 410 may be, but is not limited to, one or more of a liquid crystal display assembly, a light emitting diode display assembly (LED display assembly), a Micro light emitting diode display assembly (Micro LED display assembly), a sub-millimeter light emitting diode display assembly (Mini LED display assembly), an organic light emitting diode display assembly (OLED display assembly), and the like.

Referring to fig. 20, optionally, the circuit board assembly 430 may include a processor 431 and a memory 433. The processor 431 is electrically connected to the display device 410 and the memory 433, respectively. The processor 431 is configured to control the display component 410 to display, and the memory 433 is configured to store program codes required by the processor 431 to operate, program codes required by the display component 410 to control the display component 410, display content of the display component 410, and the like.

Optionally, the processor 431 includes one or more general purpose processors 431, wherein the general purpose processor 431 may be any type of device capable of processing electronic instructions, including a central processing unit (Central Processing Unit, CPU), microprocessor, microcontroller, main processor, controller, ASIC, and the like. Processor 431 is operable to execute various types of digitally stored instructions, such as software or firmware programs stored in memory 433, that enable the computing device to provide a wide variety of services.

Alternatively, the Memory 433 may include a Volatile Memory (Volatile Memory), such as a random access Memory (Random Access Memory, RAM); the Memory 433 may also include a Non-Volatile Memory (NVM), such as Read-Only Memory (ROM), flash Memory (FM), hard Disk (HDD), or Solid State Drive (SSD). Memory 433 may also include a combination of the above types of memory.

Referring to fig. 21 and 22, in some embodiments, the electronic device 400 further includes a middle frame 420 and a camera module 450, wherein the middle frame 420 is disposed between the display device 410 and the ceramic housing 100, and a side surface of the middle frame 420 is exposed from the ceramic housing 100 and the display device 410. The middle frame 420 and the ceramic housing 100 enclose an accommodating space, and the accommodating space is used for accommodating the circuit board assembly 430 and the camera module 450. The camera module 450 is electrically connected to the processor 431, and is used for shooting under the control of the processor 431.

Optionally, the ceramic housing 100 has a light transmitting portion 101 thereon, and the camera module 450 may take a photograph through the light transmitting portion 101 on the ceramic housing 100, that is, the camera module 450 in this embodiment is a rear camera module 450. It will be appreciated that in other embodiments, the light transmitting portion 101 may be disposed on the display assembly 410, i.e., the camera module 450 is a front camera module 450. In the schematic view of the present embodiment, the light-transmitting portion 101 is illustrated as an opening, and in other embodiments, the light-transmitting portion 101 may be made of a light-transmitting material, such as plastic, glass, or the like, instead of the opening.

It should be understood that the electronic device 400 described in this embodiment is only one form of the electronic device 400 to which the ceramic housing 100 is applied, and should not be construed as limiting the electronic device 400 provided by the present application or as limiting the ceramic housing 100 provided by the various embodiments of the present application.

Reference in the specification to "an embodiment," "implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments. Furthermore, it should be understood that the features, structures or characteristics described in the embodiments of the present application may be combined arbitrarily without any conflict with each other, to form yet another embodiment without departing from the spirit and scope of the present application.

Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A ceramic shell, wherein the ceramic shell has a roughened surface, the roughened surface comprising patterned areas having a textured pattern, the roughened surface further comprising non-patterned areas, the non-patterned areas being connected to the patterned areas; the roughness Ra1 of the patterned region is greater than the roughness Ra2 of the non-patterned region.

2. The ceramic shell according to claim 1, wherein the texture pattern comprises a plurality of texture portions, the texture portions are linear concave structures, a plurality of arc textures are arranged on the bottom wall of the texture portion in sequence along the extending direction of the texture portions, the openings of the arc textures are oriented to be the same, and the curvatures of at least part of the arc textures are equal.

3. The ceramic shell of claim 2, wherein the radius of curvature of the arcuate texture ranges from 5 μιη to 50 μιη.

4. The ceramic shell according to claim 2, wherein the shortest distance w1 of orthographic projection of the textured portion on the rough surface of the ceramic shell ranges from 10 μm to 100 μm.

5. The ceramic shell according to claim 2, wherein a depth h1 of the textured portion in a direction perpendicular to the roughened surface ranges from 1 μm to 50 μm.

6. The ceramic shell of claim 1, wherein the patterned region has a roughness Ra1 in the range of 0.05 μm +.ra 1 +.1.0 μm; the glossiness G1 of the patterned area is in the range of 3 Gu-G1-30 Gu.

7. The ceramic shell of claim 6, wherein the gloss G1 of the patterned areas is greater than the gloss G2 of the non-patterned areas; the range of the roughness Ra2 of the non-patterned area is 0.04 mu m less than or equal to Ra2 less than or equal to 0.8 mu m; the glossiness G2 of the non-patterned area is in the range of 2.0 Gu-G2-20 Gu.

8. The ceramic shell of claim 7, wherein the patterned region has a roughness Ra1 in the range of 0.6 μm +.ra 1 +.0.8 μm; the glossiness G1 of the patterned area is in the range of 3.5Gu to G1 to 8.5Gu; the range of the roughness Ra2 of the non-patterned area is 0.2 mu m less than or equal to Ra2 less than or equal to 0.6 mu m; the glossiness G2 of the non-patterned area is in the range of 2.0 Gu-G2-6.5 Gu.

9. The ceramic shell of claim 7, wherein the non-patterned region has a plurality of raised structures, a maximum height h2 of the raised structures along a direction perpendicular to the roughened surface ranging from 10 μm to 23 μm, and a maximum distance w2 of orthographic projection of the raised structures on the roughened surface ranging from 4 μm to 28 μm.

10. The ceramic shell according to claim 1, wherein the texture pattern comprises a plurality of first texture lines and a plurality of second texture lines, the plurality of first texture lines intersecting the plurality of second texture lines, the plurality of first texture lines being parallel to each other, the plurality of first texture lines extending in a first direction and being arranged in a second direction, a line width of the first texture lines being 60 μm to 80 μm, a pitch between any two adjacent first texture lines being 60 μm to 80 μm; the second texture lines are parallel to each other, extend along the second direction, are arranged along the first direction, the line width of each second texture line is 60-80 mu m, and the distance between any two adjacent second texture lines is 60-80 mu m.

11. The ceramic shell of claim 1, wherein the non-patterned region is obtained by grit blasting a ceramic shell substrate; the patterning area is obtained by carrying out sand blasting treatment and patterning treatment on the ceramic shell substrate.

12. A method of making a ceramic shell comprising:

providing a ceramic housing substrate having a surface to be treated;

patterning the intermediate rough surface to obtain a rough surface, wherein the rough surface is provided with a patterning area, the patterning area is provided with a texture pattern, the rough surface further comprises a non-patterning area, and the non-patterning area is connected with the patterning area; the roughness Ra1 of the patterned region is greater than the roughness Ra2 of the non-patterned region.

13. The method of producing a ceramic shell according to claim 12, wherein the blasting the surface to be treated to obtain an intermediate roughened surface comprises:

and (3) adopting sand grains with the mesh number of 100 meshes to 5000 meshes, and carrying out sand blasting treatment on the surface to be treated under the sand blasting pressure range of 0.1MPa to 10MPa so as to obtain an intermediate rough surface.

14. The method of producing a ceramic shell according to claim 13, wherein the number of the sand grains is 800 to 1500 mesh, and the pressure of the blasting is in the range of 0.6 to 1.2MPa.

15. The method of manufacturing a ceramic shell according to claim 13, wherein the sand grains include at least one of SiC sand, corundum sand, zirconia sand, and quartz sand, and the shape of the sand grains includes at least one of a sphere shape and a pyramid shape.

16. The method of producing a ceramic shell according to claim 13, wherein a vertical distance between the nozzle and the surface to be treated is in a range of 10cm to 50cm when the blasting is performed.

17. The method of any one of claims 12-16, wherein the patterning the intermediate roughened surface to provide a roughened surface comprises:

and carrying out laser engraving on the intermediate rough surface by adopting an infrared nanosecond laser with the wavelength of 1000nm to 1300nm so as to form a texture pattern on the intermediate rough surface to obtain the rough surface.

18. The method of producing a ceramic shell according to claim 17, wherein a spot diameter of the infrared nanosecond laser is in a range of 60 μm to 80 μm.

19. The method of claim 17, wherein the laser engraving speed is in the range of 800mm/s to 1500mm/s, the laser engraving frequency is in the range of 40KHz to 300KHz, and the laser engraving output power is in the range of 6W to 24W.

20. The method of claim 12, wherein the texture pattern comprises a plurality of first texture lines and a plurality of second texture lines, the plurality of first texture lines intersecting the plurality of second texture lines, the plurality of first texture lines being parallel to each other, the plurality of first texture lines extending in a first direction, the plurality of second texture lines being aligned in a second direction, the plurality of second texture lines being parallel to each other, the plurality of second texture lines extending in the second direction, the plurality of second texture lines being aligned in the first direction,

The patterning treatment is carried out on the intermediate rough surface to obtain a rough surface, and the patterning treatment comprises the following steps: performing first laser engraving to form a plurality of first texture lines on the intermediate rough surface; and performing second laser engraving on the intermediate rough surface to form a plurality of second texture lines on the intermediate rough surface.

21. The method of producing a ceramic shell according to any one of claims 12 to 16, 18 to 20, further comprising:

annealing is carried out at 750-850 ℃.

22. An electronic device, comprising:

a display assembly;

the ceramic housing of any one of claims 1 to 11, disposed on one side of the display assembly; and