WO2014153955A1

WO2014153955A1 - Ceramic casing structural part, manufacturing method thereof and mobile phone

Info

Publication number: WO2014153955A1
Application number: PCT/CN2013/086038
Authority: WO
Inventors: 蔡明�
Original assignee: 华为技术有限公司
Priority date: 2013-03-25
Filing date: 2013-10-28
Publication date: 2014-10-02
Also published as: CN104068595B; CN104068595A

Abstract

A ceramic casing structural part, comprising a ceramic casing and a frame (13) provided with a recess; the ceramic casing comprises a ceramic flat piece (11) and a ceramic projection (12) protruding outward from the side face of the ceramic flat piece (11); the ceramic projection (12) is sleeved in the recess of the frame (13), such that the ceramic flat piece (11) closely binds with the frame (13); the upper surface at the junction of the frame (13) and the ceramic projection (12) is flush with the upper surface of the ceramic flat piece (11) in the thickness direction of the ceramic flat piece (11); the frame (13) encloses the side face, or the side face and bottom face of the ceramic casing; the material of the frame (13) is an alloy, a metal-base composite material, or plastic; the frame (13) protects the edge of the ceramic casing from direct collision with other objects; the ceramic projection (12) increases the binding force between the ceramic casing and the frame (13), thus improving the overall impact resistance of the ceramic casing structural part, and expanding the application scope thereof. Also provided are a manufacturing method of the ceramic casing structural part and a mobile phone comprising the same.

Description

Ceramic shell structural member, preparation method thereof and mobile phone The present application claims to be submitted to the Chinese Patent Office on March 25, 2013, application number 201310097334.0, the invention name is "a ceramic shell structural member and a preparation method thereof" The priority of the Chinese Patent Application, which is incorporated herein by reference. Technical field

The invention relates to a ceramic product structure, in particular to a ceramic shell structural member, a preparation method thereof and a mobile phone. Background technique

Ceramics are a common class of structural materials. With the rapid development of digital products such as smart phones, major companies are actively developing unique digital product structural materials to seize commercial selling points, such as the development of ceramic materials as mobile phone casings. Understandably, the shell material needs to have a certain anti-drop performance, and at the same time, it should be low-cost and easy to prepare, and the ceramic material is easily damaged when colliding with other objects because of its large brittleness. The use of ceramic materials as a housing. Summary of the invention

In view of this, the embodiment of the present invention provides a ceramic housing structural member for solving the problem that the ceramic housing is brittle and easily broken in the prior art. Embodiments of the present invention also provide a method of fabricating a ceramic housing structural member and a mobile phone including a ceramic housing structural member.

A first aspect of an embodiment of the present invention provides a ceramic housing structural member including a ceramic housing and a frame provided with a 1HJ portion, the ceramic housing including a ceramic flat plate and a ceramic protruding outward from a side surface of the ceramic flat plate a protruding member, the ceramic protruding member is sleeved in a portion of the frame such that the ceramic plate and The frame is tightly coupled, and an upper surface of the joint between the frame and the ceramic protruding member is flush with an upper surface of the ceramic plate along a thickness direction of the ceramic plate, and the frame covers the ceramic case The side surface or the side surface and the bottom surface of the ceramic casing are covered, and the material of the frame is alloy, metal matrix composite or plastic.

Preferably, the ceramic protruding member is a three-dimensional structure having an inclined angle. More preferably, the ceramic projection is a sharp-angled three-dimensional structure.

Preferably, the surface of the ceramic protruding piece is provided with a hole having a hole diameter of 1 to 10 mm.

Preferably, the surface of the ceramic housing is provided with micropores having a pore diameter of 1 to 1000 μm.

A second aspect of the present invention provides a method for preparing a ceramic shell structural member, comprising the steps of: taking a ceramic powder, preparing a ceramic slurry, drying, granulating, and filling the granulated particles into a ceramic shell The ceramic plate corresponding to the groove of the body mold and the ceramic protruding piece are formed into a ceramic embryo according to the preforming in the groove, and sintered to obtain a ceramic shell, wherein the ceramic shell comprises a ceramic flat plate and protrudes outward from the side surface of the ceramic flat plate. a ceramic protruding member, the surface of the ceramic protruding member is provided with a hole having a hole diameter of 1 to 10 mm, and then a hole having a hole diameter of 1 to 1000 μm is formed on the surface of the ceramic casing, and a frame material and a ceramic casing having a hole are formed. a ceramic housing structural member is obtained by an integral molding method, and the ceramic protruding member is sleeved in the concave portion of the frame such that the ceramic flat plate is tightly combined with the frame, in the thickness direction of the ceramic plate An upper surface of the joint between the frame and the ceramic protruding member is flush with an upper surface of the ceramic plate, and the frame covers the side or package of the ceramic case The sides and bottom of the ceramic shell, the rim is made of an alloy, a plastic or metal matrix composites.

Preferably, the method for making a hole having a pore diameter of 1 to 1000 μm on the surface of the ceramic casing is chemical corrosion pore-forming, hot etching or laser drilling.

Preferably, when the material of the frame is an alloy, the integrated molding method is die-casting, and the specific operation is: placing the ceramic shell into the cavity of the ceramic shell structural part die-casting mold, using liquid or semi-solid The alloy material is die-casted, that is, the ceramic shell structural member is obtained.

Preferably, the ceramic protruding member is a three-dimensional structure having an inclined angle.

A third aspect of the present invention provides a mobile phone, including a movement, a front cover and a rear cover. The front cover and the rear cover form a cavity through a fixed connection, and the movement is received in the cavity. The back shell is a ceramic shell structural member, comprising a ceramic shell and a frame provided with a portion, the ceramic shell comprising a ceramic flat plate and a ceramic protruding member protruding outward from a side surface of the ceramic flat plate, the ceramic protruding piece sleeve Provided in the 1HJ portion of the frame such that the ceramic plate is tightly coupled to the frame, the upper surface of the frame connecting the frame and the ceramic protruding member and the upper surface of the ceramic plate in the thickness direction of the ceramic plate The surface is flush, and the frame covers the side surface of the ceramic shell or covers the side surface and the bottom surface of the ceramic shell. The material of the frame is alloy, metal matrix composite or plastic.

The embodiment of the invention provides a ceramic shell structural member, which comprises a ceramic shell and a frame, and the frame can protect the edge of the ceramic shell from directly colliding with other objects, thereby reducing the possibility of the ceramic shell being broken due to the impact of the hard object. The ceramic protruding member in the ceramic shell can increase the bonding force between the ceramic shell and the frame, thereby improving the overall anti-fall ability of the ceramic shell structural member, and expanding the application range of the ceramic shell structural member. The embodiment of the invention also provides a method for preparing a ceramic shell structural member. In addition, an embodiment of the present invention provides a mobile phone including the ceramic housing structural member, which is not easily broken, and thus has a long service life. DRAWINGS

1 is a schematic structural view of a ceramic shell structural member prepared according to Embodiment 1 of the present invention;

2 is a front view of a ceramic housing prepared in accordance with Embodiment 1 of the present invention;

Figure 3 is a right side view of the ceramic housing obtained in the first embodiment of the present invention;

4 is a top plan view of a ceramic housing prepared in accordance with Embodiment 1 of the present invention;

5 is a schematic structural view of a ceramic shell structural member prepared according to Embodiment 2 of the present invention; Figure 6 is a front view of a ceramic casing obtained in the second embodiment of the present invention

Figure 7 is a right side view of the ceramic housing obtained in the second embodiment of the present invention.

Figure 8 is a plan view of a ceramic case obtained in the second embodiment of the present invention.

9 is a schematic structural view of a ceramic housing structural member manufactured in a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a preferred embodiment of the embodiments of the present invention. It should be noted that one of ordinary skill in the art will recognize A number of modifications and refinements can also be made without departing from the principles of the embodiments of the present invention. These improvements and modifications are also considered to be within the scope of the embodiments of the present invention.

The embodiment of the invention provides a ceramic shell structural member for solving the problem that the ceramic shell is brittle and easy to be broken in the prior art. Embodiments of the present invention also provide a method of fabricating a ceramic housing structural member and a mobile phone including a ceramic housing structural member.

A first aspect of the embodiments of the present invention provides a ceramic housing structural member, comprising a ceramic housing and a frame provided with a 1HJ portion, the ceramic housing comprising a ceramic flat plate and a ceramic protruding member protruding outward from a side surface of the ceramic flat plate, ceramic The protruding member is sleeved in the portion of the frame such that the ceramic plate is tightly combined with the frame, and the upper surface of the joint between the frame and the ceramic protruding member in the thickness direction is flush with the upper surface of the ceramic plate, and the frame covers the side of the ceramic casing or is covered The side and bottom of the ceramic housing are made of alloy, metal matrix composite or plastic.

The shape of the frame is not limited, and it is subject to actual needs, and usually includes a corner structure. When the ceramic shell structural member collides with other objects, the frame can protect the edge of the ceramic shell from directly colliding with other objects, buffering the impact force caused by the impact, thereby reducing the ceramic shell from being broken due to the impact of the hard object. The possibility. It is better to use a plastic frame.

The shape and thickness of the ceramic plate are not limited, and can be made into various shapes according to the actual needs of the product. Preferably, the ceramic plate is a rectangular plate. In the thickness direction of the ceramic plate, the ceramic plate There are upper and lower surfaces, and the upper and lower surfaces have a certain degree of smoothness.

The shape of the ceramic protruding member is not limited, and its function is to enhance the bonding force between the ceramic flat plate and the frame. Preferably, the ceramic protruding member is a three-dimensional structure having an inclined angle. More preferably, the ceramic projection is a sharp-angled three-dimensional structure. The number of ceramic protruding members is not limited and may be one or more.

In order to enhance the bonding force between the ceramic flat plate and the frame, a millimeter-level macroscopic hole may be set on the surface of the ceramic protruding piece by physical preform molding, and/or the hole may be formed by chemical etching on the surface of the ceramic case. Corrosion and laser drilling methods set microscopic microscopic holes. Preferably, the surface of the ceramic protruding member is provided with a hole having a hole diameter of 1 to 10 mm. Preferably, the surface of the ceramic housing is provided with a hole having a hole diameter of 1 to 1000 μm.

The material of the ceramic case is not limited. Preferably, the ceramic casing is made of alumina-based ceramic or cerium oxide-based ceramic, and the grain size is on the order of micrometers or nanometers. Alumina-based ceramics, that is, ceramics formed by doping other oxides with aluminum oxide, ceramics formed by oxidizing zirconium oxide doped with other oxides, these other oxides may be selected from, but not limited to, cerium oxide and magnesium oxide, ceramics The material of the housing can contain both alumina and zirconia.

The color of the ceramic case is not limited, and may be white mainly composed of alumina or zirconia, or other colors (such as black, blue or multi-color, etc.) formed by incorporation of substances such as impurities and toners, or The color formed by sintering in the atmosphere.

The embodiment of the invention provides a ceramic shell structural member, which comprises a ceramic shell and a frame, and the frame can protect the edge of the ceramic shell from directly colliding with other objects, thereby reducing the possibility of the ceramic shell being broken due to the impact of the hard object. The ceramic protruding member in the ceramic shell can increase the bonding force between the ceramic shell and the frame, thereby improving the overall drop resistance of the ceramic shell structural member of the present invention, and expanding the application range of the ceramic shell structural member. A ceramic case structural member provided by the first aspect of the present invention can be used as a back shell of a digital electronic product such as a back cover of a mobile phone and a back cover of a tablet computer, and can also be applied to a ceramic such as a ceramic knife. In the product.

The preform is formed by placing the granules obtained after granulation into a mold of a certain shape, providing a certain pressure to compact the granules obtained after granulation, preparing a ceramic embryo matching the shape of the mold, and maintaining the upper and lower surfaces of the ceramic embryo. Has a certain degree of smoothness. The method of forming the preform is not limited, and includes, but is not limited to, compression molding, isostatic pressing, hot die casting, grouting, extrusion molding, roll forming, injection molding, and in-situ solidification. Preferably, the granulation is a granule having a sieve of 20 to 80 mesh. Preferably, the preforming is dry pressing, and a pressure of 60 to 120 MPa is applied during the dry pressing. Preferably, the ceramic projecting piece is a three-dimensional structure having an inclined angle. More preferably, the ceramic protruding piece embryo is a sharp-edged vertical structure. Providing a hole having a hole diameter of 1 to 10 mm on the surface of the ceramic protruding piece in the preform forming step can enhance the bonding force between the ceramic plate and the frame.

Micron-scale microscopic holes are placed on the surface of the ceramic shell to enhance the bonding force between the ceramic plate and the frame. Preferably, the method for forming a hole having a pore diameter of 1 to 1000 μ ηι on the surface of the ceramic shell Porosity, thermal corrosion or laser drilling for chemical etching.

The sintering is performed by sintering the ceramic embryo under high temperature conditions, and the ceramic shell obtained after sintering is maintained in a substantially uniform shape with the ceramic embryo, and the ceramic shell may undergo slight shrinkage and the like due to high-temperature sintering. The method of sintering is not limited and includes, but is not limited to, atmospheric pressure sintering, hot press sintering, isostatic pressing, reaction sintering, atmosphere sintering, electric spark sintering, and discharge plasma sintering. The shape and thickness of the ceramic plate are not limited, and can be made into various shapes according to the actual needs of the product. Preferably, the ceramic plate is a rectangular plate. The shape of the ceramic protruding member is not limited, and may be disposed at a position where the edge or the lower surface of the ceramic flat plate is in contact with the frame, and the function thereof is to enhance the bonding force between the ceramic flat plate and the frame. Preferably, the ceramic protruding member is a three-dimensional structure having an inclined angle. More preferably, the ceramic projection is a sharp-edged vertical structure. Preferably, the sintering conditions are such that the temperature is raised at a rate of 8 to 15 ° C/min to 1600 to 1700 ° C for 1.5 to 2.5 hours.

Preferably, when the material of the frame is an alloy, the integrated molding method is die-casting, and the specific operation is as follows: placing the ceramic shell into the cavity of the ceramic shell structural part die-casting mold, using liquid or semi-solid The alloy material is die-casted, that is, the ceramic shell structural member is obtained.

Among them, the material of the ceramic powder in the ceramic slurry can be adjusted according to different product performance requirements, and is not particularly limited. The material of the ceramic powder is not limited and usually contains alumina and/or zirconia. Materials such as impurities and toners may also be added to the material of the ceramic powder to adjust the color of the ceramic casing. Preferably, the ceramic casing is made of alumina-based ceramic or oxidized ceramic, and the grain size is on the order of micrometers or nanometers. Alumina-based ceramics, that is, ceramics formed by doping other oxides with aluminum oxide, ceramics formed by oxidizing zirconium oxide doped with other oxides, these other oxides may be selected from, but not limited to, cerium oxide and magnesium oxide, ceramics The material of the housing can contain both alumina and zirconia.

Preferably, the material of the ceramic powder is as follows, in weight percent:

α -Α1 ₂ 0 ₃ , 40% ~ 90%, purity 99% and above, particle size 0.1 ~ 3 microns; γ -Α1 ₂ 0 ₃ , 9% ~ 59%, purity 99% and above, particle size 0.1 ~ 3 microns;

MgO, 0.1% ~ 0.5%; purity 99.9% or more, particle size 0.1 ~ 3 microns;

Υ ₂ 0 ₃ , 0.1% ~ 0.5%; purity above 99.9%, particle size 0.1 ~ 3 microns;

The total amount of α -Α1 ₂ 0 ₃ and γ -Α1 ₂ 0 ₃ is 99% ~ 99.9%, and the total amount of MgO and Y ₂ 0 ₃ is 0.1% ~ 1%, α -Α1 ₂ 0 ₃ , γ -Α1 ₂ The total weight percentage of 0 ₃ , MgO and Υ ₂ 0 ₃ is 100%.

Also preferably, the material of the ceramic powder is as follows, in weight percent:

Zr0 ₂ , 94 - 96%, purity 99% and above, particle size 0.1 ~ 3 microns;

Y ₂ 0 ₃ , 2-3%, purity 99% and above, particle size 0.1 ~ 3 microns;

Α1 ₂ 0 ₃ , 0~3%, purity 99% and above, particle size 0.1 ~ 3 microns;

The total weight percentage of Zr0 ₂ , Y ₂ 0 ₃ and A1 ₂ 0 ₃ is 100%.

Preferably, the ball mill is obtained by adding distilled water or ethanol to the ceramic powder as a medium, adding oleic acid as a dispersing agent, adding stearic acid as a grinding aid, and ball milling for 36-60 hours to obtain a ceramic slurry.

The preparation method of a ceramic shell structural member is simple and convenient, and is suitable for mass production and application.

A third aspect of the present invention provides a mobile phone, including a movement, a front cover and a rear cover. The front cover and the rear cover form a cavity through a fixed connection, and the movement is received in the cavity. The back shell is a ceramic shell structural member, comprising a ceramic shell and a frame provided with a 1HJ portion, the ceramic shell comprising a ceramic flat plate and a ceramic protruding member protruding outward from a side surface of the ceramic flat plate, the ceramic protruding member Nested in the recess of the frame such that the ceramic plate is tightly coupled to the frame, the upper surface of the frame connecting the frame with the ceramic protruding member and the ceramic plate in the thickness direction of the ceramic plate The upper surface is flush, and the frame covers the side surface of the ceramic shell or covers the side surface and the bottom surface of the ceramic shell. The material of the frame is alloy, metal matrix composite or plastic.

Preferably, the ceramic protruding member has a sharp-angled three-dimensional structure. Preferably, the surface of the ceramic protruding piece is provided with a hole having a hole diameter of 1 to 10 mm.

Other features of the ceramic housing structural member are described above and will not be described herein.

Embodiment 1

A ceramic housing structural member includes a ceramic housing and a bezel. 1 is a schematic structural view of a ceramic shell structural member obtained in accordance with a first embodiment of the present invention, FIG. 2 is a front view of a ceramic casing obtained in accordance with an embodiment of the present invention, and FIG. 3 is a ceramic obtained in accordance with an embodiment of the present invention; Right side view of the housing, Figure 4 is a plan view of a ceramic housing made in accordance with an embodiment of the present invention. As can be seen in conjunction with Figures 1 to 4, the ceramic housing includes a ceramic plate 11 and two ceramic projections 12 projecting outwardly from opposite sides of the ceramic plate 11. The ceramic plate 11 is a rectangular plate having a length L1 equal to 60 mm, a width L2 equal to 100 mm, and a height L3 equal to 0.8 mm.

The two ceramic protruding members 12 are each a sharp-angled three-dimensional structure, and the lengths L4 and L5 in the L1 direction of the ceramic flat plate 11 are both 3 mm, and the width in the L2 direction and the height in the L3 direction are both the ceramic flat plate 11 the same. In the embodiment, the two ceramic protruding members 12 are provided with two frames 13 , and the frame 13 is made of plastic and has a curved structure. One end of each of the two frames 13 is provided with a pointed-shaped recess for arranging the ceramic protruding member 12, that is, covering the side of the ceramic casing. The ceramic protruding member 12 is sleeved in the 1HJ portion of the bezel 13 so that the ceramic flat plate 11 is tightly coupled to the bezel 13. The upper surface of the frame 13 at the junction with the ceramic projecting member 12 in the thickness direction of the ceramic flat plate 11 is flush with the upper surface of the ceramic flat plate 11. In the present embodiment, the lower surface of the frame 13 and the lower surface of the ceramic plate 11 in the thickness direction of the ceramic plate 11 is also flush with the lower surface of the ceramic plate 11. In order to increase the bonding force between the ceramic projecting member 12 and the frame 13, the surfaces of the two ceramic projecting members 12 are provided with holes in the preform forming step, and the holes D1 and D2 of the holes are both lmm. Further, a lower surface of the ceramic flat plate 11 and a lower surface of the ceramic projecting member 12 are provided with a microporous structure having a diameter of about 50 μm (not shown).

Embodiment 2 A ceramic housing structural member includes a ceramic housing and a bezel. 5 is a schematic structural view of a ceramic housing structural member obtained in Embodiment 2 of the present invention, FIG. 6 is a front view of a ceramic housing obtained in Embodiment 2 of the present invention, and FIG. 7 is a ceramic obtained in Embodiment 2 of the present invention; Right side view of the housing, Fig. 8 is a plan view of the ceramic housing obtained in the second embodiment of the present invention. As can be seen in conjunction with FIGS. 5-8, the ceramic housing includes a ceramic flat plate 21 and ten ceramic protruding members 22 projecting symmetrically outward from two opposite sides of the ceramic flat plate 21, each of which is provided with five independent ones. Ceramic protruding member 22. The ceramic plate 21 is a rectangular plate having a length L1 equal to 60 mm, a width L2 equal to 100 mm, and a height L3 equal to 0.8 mm. Each of the ten ceramic projecting members 22 has a sharp-angled three-dimensional structure, and the lengths L4' and L5' in the direction of the ceramic flat plate L1' are both 3 mm. In this embodiment, a frame 23 made of an aluminum alloy is provided. The frame 23 includes a first corner structure (not labeled in the figure), a second corner structure (not labeled in the figure), and a bottom connector (not labeled in the figure), the first corner structure and the second corner structure are each One end is provided with a pointed-shaped recess for arranging the ceramic protruding member 22, and the first corner structure, the second corner structure and the bottom connecting member are combined to cover the side and the bottom surface of the ceramic casing. The ceramic protruding member 22 is sleeved in the recess of the bezel 23 so that the ceramic flat plate 21 is tightly coupled to the bezel 23. The upper surface at which the frame 23 and the ceramic projecting piece 22 are joined in the thickness direction of the ceramic flat plate 21 is flush with the upper surface of the ceramic flat plate 21. In the present embodiment, the thickness of the first corner structure and the second corner structure of the frame 23 in the thickness direction of the ceramic flat plate 21 is 1 mm. In order to increase the bonding force between the ceramic protruding member 22 and the frame 23, the surface of the ceramic protruding member 22 is provided with holes in the preform forming step, and the holes D1 and D2 of the holes are both lmm. Further, a lower surface of the ceramic flat plate 21 and a lower surface of the ceramic projecting member 22 are provided with a microporous structure having a diameter of about 50 μm (not shown).

Embodiment 3

A ceramic housing structural member includes a ceramic housing and a bezel. FIG. 9 is a schematic structural view of a ceramic shell structural member prepared according to Embodiment 3 of the present invention. As can be seen from Figure 9, the ceramic housing includes a ceramic plate 31 and two ceramic projections 32 projecting outwardly from opposite sides of the ceramic plate 31. 2 pottery The porcelain projecting members 32 are each a rectangular parallelepiped structure, and the thickness of the ceramic projecting members 32 in the thickness direction of the ceramic flat plate 31 is slightly thinner than that of the ceramic flat plate 31. In this embodiment, a frame 33 made of plastic is provided. Similar to the second embodiment, the frame 33 includes a first corner structure (not labeled in the figure), a second corner structure (not labeled in the figure), and a bottom connector (not labeled in the figure), the first corner structure and The second corner structure is respectively provided at one end thereof with a rectangular parallelepiped recess for arranging the ceramic protruding member 32, and the first corner structure, the second corner structure and the bottom connecting member are combined to cover the side of the ceramic shell And the bottom surface. The ceramic protruding member 32 is sleeved in the recess of the bezel 33 such that the ceramic flat plate 31 is tightly coupled to the bezel 33. The upper surface at which the frame 33 is joined to the ceramic projecting member 32 in the thickness direction of the ceramic flat plate 31 is flush with the upper surface of the ceramic flat plate 31. In the present embodiment, the thickness of the first corner structure and the second corner structure of the frame 33 in the thickness direction of the ceramic flat plate 31 is slightly larger than the thickness of the ceramic flat plate 31.

Embodiment 4

A method for preparing a ceramic shell structural member comprises the following steps:

(1) In terms of weight percentage, according to the following group distribution ratio ceramic powder, adding distilled water as medium, and adding oleic acid as dispersing agent, adding stearic acid as grinding aid, ball milling for 60 hours, ball milling to obtain uniform mixing Ceramic slurry

α -Α1 ₂ 0 ₃ , 90%, purity 99%, particle size 0.1 m;

γ -Α1 ₂ 0 ₃ , 9%, purity 99%, particle size 0.1 m;

MgO, 0.5%; purity 99.9%, particle size 0.1 micron;

Y ₂ 0 ₃ , 0.5%; purity 99.9%, particle size 0.1 micron;

The total number of oleic acid and stearic acid in the ceramic slurry is 0.5% ~ 1.2% and 0.5% ~ 3.5%, respectively.

(2) granulating the ceramic slurry to obtain granules of 20 mesh to 80 mesh, and then placing the granulated granules in a mold and preforming at a pressure of 120 MPa to obtain a ceramic embryo. The 1HJ groove shape of the mold is corresponding to the ceramic shell structure in the first embodiment of the present invention, and the mold corresponds to the ceramic protrusion The position of the piece is set with a particle-shaped protrusion having a particle diameter of 1 mm, that is, a hole having a hole diameter of 1 mm is disposed on the surface of the ceramic protruding piece, and the upper and lower surfaces of the ceramic plate piece are pressed to have a certain degree of smoothness;

(3) The ceramic shell was obtained by sintering, and the sintering condition was heated to a temperature of 15 ° C/min to 1700 ° C for 1.5 hours, and the upper and lower surfaces of the ceramic flat plate were pressed during the sintering to increase the flatness.

(4) The lower surface of the prepared ceramic shell is immersed in a 0.5 mol/L NaOH solution for chemical etching for 15 min, thereby forming a microporous structure having a pore diameter of about 50 μm on the lower surface of the ceramic flat plate and the lower surface of the ceramic protruding member. .

(5) taking the chemically etched ceramic shell into a mold, and adding plastic raw materials to the mold by injection molding, and integrally forming the ceramic shell structural member.

Embodiment 5

(1) In terms of weight percentage, the ceramic powder is obtained according to the following group distribution ratio, ethanol is added as the medium, the PVA binder is fully stirred and mixed and uniformly ball milled for 36 hours to uniformly mix the ceramic powder, and ball mill is used to obtain a uniformly mixed ceramic slurry. ;

Zr0 ₂ , 96%, purity 99%, particle size 0.1 m

Y ₂ 0 ₃ , 3%, purity 99%, particle size 0.1 m;

A1 ₂ 0 ₃ , 1%, purity 99%, particle size 0.1 m;

The total number of integrals of the PVA binder in the ceramic slurry was 5%.

(2) granulating the ceramic slurry to obtain granules of 20-80 mesh sieve, and then placing the granulated particles into a mold and forming a ceramic embryo by molding at a pressure of 60 MPa. The groove shape of the mold is corresponding to the ceramic shell structure in the second embodiment of the present invention, and the position of the corresponding protruding member of the mold is provided with a granular protrusion having a particle diameter of 1 mm, that is, the surface of the ceramic protruding piece is set. a hole having a hole diameter of lmm, and the upper and lower surfaces of the ceramic flat plate are pressed to have a certain degree of smoothness; (3) Sintering to obtain a ceramic shell, the sintering condition is to preheat the temperature at a rate of 4 ° C / min to 800 ° C, and then to a temperature of 8 ° C / min to 1400 ° C for 2.5 hours, sintering process The upper and lower surfaces of the ceramic flat embryo are pressed to increase the flatness.

(4) taking 3 parts of sulfuric acid and 2 parts of water to prepare a sulfuric acid corrosion solution, immersing the lower surface of the obtained ceramic shell in a sulfuric acid corrosion solution for 5 minutes, thereby lowering the lower surface of the ceramic plate and the lower surface of the ceramic protruding piece A pore structure having a pore diameter of about 1 μm is formed, and the stone S炱 etching solution can be appropriately subjected to heat of the mouth.

Embodiment 6

A mobile phone, comprising a movement, a front cover and a rear cover, wherein the front cover and the rear cover form a cavity by a fixed connection, the movement is received in the cavity, and the rear case is as described in the first embodiment of the present invention. Ceramic housing structural parts. The ceramic shell structural member comprises a ceramic shell and a frame, and the frame can protect the edge of the ceramic shell from directly colliding with other objects, thereby reducing the possibility of the ceramic shell being broken by the impact of the hard object, and the ceramic protrusion in the ceramic shell The component can increase the bonding force between the ceramic shell and the frame, and improves the overall anti-fall ability of the ceramic shell structural member, thereby prolonging the service life of the mobile phone.

Claims

Rights request

1. A ceramic shell structural member, characterized in that it includes a ceramic shell and a frame provided with a recess, the ceramic shell includes a ceramic flat plate and a ceramic protruding piece protruding outward from the side of the ceramic flat plate, so The ceramic protruding piece is set in the 1HJ part of the frame so that the ceramic flat plate and the frame are closely combined. In the thickness direction of the ceramic flat plate, the upper surface of the connection point between the frame and the ceramic protruding piece is in contact with the The upper surface of the ceramic plate is flush, and the frame covers the side of the ceramic case or the side and bottom of the ceramic case. The frame is made of alloy, metal matrix composite material or plastic.

2. A ceramic shell structural member according to claim 1, characterized in that the ceramic protruding member is a three-dimensional structure with an inclination angle.

3. A ceramic shell structural member according to claim 2, characterized in that the ceramic protruding member has a sharp-angled three-dimensional structure.

4. A ceramic shell structural member according to claim 1, characterized in that the surface of the ceramic protruding member is provided with holes with a diameter of 1 to 10 mm.

5. A ceramic shell structural member according to claim 1, characterized in that the surface of the ceramic shell is provided with micropores with a diameter of 1 to 1000 μm.

6. A method for preparing ceramic shell structural parts, which is characterized by including the following steps: taking ceramic powder, preparing ceramic slurry, drying, granulating, and filling the granulated particles into the ceramic shell mold. The ceramic embryo is formed by molding the corresponding grooves of the ceramic plate and the corresponding grooves of the ceramic protruding parts to obtain a ceramic embryo, and then sintering to obtain a ceramic shell. The ceramic shell includes a ceramic plate and a ceramic protruding part protruding outward from the side of the ceramic plate. , the surface of the ceramic protruding piece is provided with holes with apertures of 1 to 10 mm, and then holes with apertures of 1 to 1000 μm are made on the surface of the ceramic shell. The frame raw materials and the ceramic shell with the holes are taken, and integrated The ceramic shell structural part is prepared by the molding method, and the ceramic protruding part is set on the frame. The ceramic plate and the frame are closely combined within the ceramic plate, and the upper surface of the connection between the frame and the ceramic protruding piece in the thickness direction of the ceramic plate is flush with the upper surface of the ceramic plate, and the frame Covering the side of the ceramic case or covering the side and bottom of the ceramic case, the frame is made of alloy, metal matrix composite material or plastic.

7. The method for preparing a ceramic shell structural member according to claim 6, wherein the method for creating holes with a diameter of 1 to 1000 μm on the surface of the ceramic shell is chemical etching. , thermal etching or laser drilling method.

8. The method for preparing a ceramic shell structural member according to claim 6, wherein when the material of the frame is alloy, the integrated forming method is die-casting, and the specific operation is: The ceramic shell is placed into the die-casting mold cavity of the ceramic shell structural part, and is die-cast with liquid or semi-solid alloy raw materials to obtain the ceramic shell structural part.

9. The method for preparing a ceramic shell structural member according to claim 6, wherein the ceramic protruding member is a three-dimensional structure with an inclination angle.

10. A mobile phone, including a movement, a front cover and a back case. The front cover and the back case are fixedly connected to form a cavity. The movement is accommodated in the cavity. The feature is that the back case is The ceramic shell structural component includes a ceramic shell and a frame provided with a portion. The ceramic shell includes a ceramic flat plate and a ceramic protruding piece protruding outward from the side of the ceramic flat plate. The ceramic protruding piece is sleeved on the ceramic plate. The ceramic plate and the frame are closely combined in the 1HJ part of the frame, and the upper surface of the connection between the frame and the ceramic protruding piece in the thickness direction of the ceramic plate is flush with the upper surface of the ceramic plate. , the frame covers the side of the ceramic case or covers the side and bottom of the ceramic case, and the frame is made of alloy, metal matrix composite material or plastic.