CN113347816A

CN113347816A - Shell, preparation method thereof and electronic equipment

Info

Publication number: CN113347816A
Application number: CN202110606817.3A
Authority: CN
Inventors: 陈奕君; 胡梦; 李聪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-09-03
Anticipated expiration: 2041-05-31
Also published as: CN113347816B; WO2022252726A1

Abstract

A housing is provided that includes a first polymer-ceramic composite layer and a second polymer-ceramic composite layer, and a fiber-reinforced polymer composite layer disposed between the first polymer-ceramic composite layer and the second polymer-ceramic composite layer. The fiber reinforced polymer composite layer in the shell has good toughness and strong impact resistance, and the first polymer ceramic composite layer and the second polymer ceramic composite layer improve the hardness and the wear resistance of the shell, so that the shell has ceramic texture and is more beneficial to application. The application also provides a preparation method of the shell and electronic equipment.

Description

Shell, preparation method thereof and electronic equipment

Technical Field

The application belongs to the technical field of electronic products, and particularly relates to a shell, a preparation method of the shell and electronic equipment.

Background

With the increase of the consumption level, consumers have increasingly demanded electronic products with not only diversification of functions but also appearance, texture, and the like. In recent years, ceramic materials have been the focus of research on electronic device housings due to their warm and moist texture. However, the ceramic shell and the method for manufacturing the same still need to be improved.

Disclosure of Invention

In view of this, the application provides a casing, a preparation method thereof and an electronic device, wherein the casing has excellent hardness and toughness, improves the use performance and the service life of the casing, has a ceramic appearance, and is beneficial to the application of the casing in the electronic device.

In a first aspect, the present application provides a casing comprising a first polymer-ceramic composite layer and a second polymer-ceramic composite layer, and a fiber-reinforced polymer composite layer disposed between the first polymer-ceramic composite layer and the second polymer-ceramic composite layer.

In a second aspect, the present application provides a method of manufacturing a housing, comprising:

sequentially stacking a first polymer ceramic sheet, a fiber reinforced polymer sheet and a second polymer ceramic sheet to form a stacked structure;

and pressing the stacked structure to obtain the shell.

In a third aspect, the present application provides an electronic device comprising the housing of the first aspect.

The application provides a shell and a preparation method of the shell, wherein a fiber reinforced polymer composite layer in the shell has good toughness and strong shock resistance, and a first polymer ceramic composite layer and a second polymer ceramic composite layer improve the hardness and the wear resistance of the shell, so that the shell has ceramic texture and is more beneficial to application; the preparation method of the shell is simple and easy to operate, and industrial production can be realized; the electronic equipment with the shell has the advantages of hardness and toughness, ceramic appearance and capability of meeting user requirements.

Drawings

In order to more clearly explain the technical solution in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

Fig. 1 is a schematic structural diagram of a housing according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of the inside of a housing according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a housing according to another embodiment of the present application.

Fig. 4 is a schematic structural diagram of a housing according to another embodiment of the present application.

Fig. 5 is a flowchart of a method for manufacturing a housing according to an embodiment of the present disclosure.

Fig. 6 is a flowchart of a method for manufacturing a housing according to another embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications are also considered as the protection scope of the present application.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, a schematic structural diagram of a casing according to an embodiment of the present disclosure is shown, in which the casing 100 includes a first polymer-ceramic composite layer 10 and a second polymer-ceramic composite layer 30, and a fiber-reinforced polymer composite layer 20 disposed between the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30.

In the present application, the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30 have ceramic materials, so that the surface of the housing 100 presents ceramic texture, and meanwhile, the ceramic materials have high hardness and good wear resistance, and the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30 arranged in the housing 100 improve the hardness of the surface of the housing 100, thereby enhancing the wear resistance of the housing 100; the fiber reinforced polymer composite layer 20 arranged inside the shell 100 has good shock resistance, and can quickly and effectively disperse and homogenize the external acting force, thereby avoiding the problems of stress concentration, crack formation, crack expansion and the like, further reducing the brittleness of the shell 100, improving the toughness of the shell 100, improving the service performance and the service life of the shell 100, and being more beneficial to the application of the shell. The application provides a have the polymer in casing 100 to can reduce ceramic powder's use, and then can effectively reduce casing 100's quality, thereby accord with frivolous user demand, still promoted dielectric property simultaneously. Compared with a ceramic shell, the shell 100 provided by the application has lighter weight and better toughness, and can effectively solve the problems of poor shock resistance, easiness in crushing and high processing difficulty of the shell 100 when the content of ceramic powder is too high; compared with a plastic shell, the shell 100 provided by the application has the advantages of high surface hardness, good wear resistance, high-grade texture of ceramic and strong product competitiveness. Further, the outermost both sides of casing 100 that this application provided are first polymer ceramic composite layer 10 and second polymer ceramic composite layer 30 in range upon range of orientation, and first polymer ceramic composite layer 10 and second polymer ceramic composite layer 30 all can regard as the outer skin of casing 100 to casing 100 need not to carry out extra detection and confirms the outer skin in the application, and is more convenient save time.

In the application, the fiber reinforced polymer composite layer 20 comprises a fiber material and a third polymer, fibers in one-dimensional linear morphology in the fiber reinforced polymer composite layer 20 are mutually overlapped to form a three-dimensional skeleton network, and compared with a three-dimensional skeleton structure formed by the third polymer, the three-dimensional skeleton structure formed by the fibers has better mechanical property and more stable structure, so that the effect of reinforcing the polymer is achieved; when external force is applied, external force can be rapidly transmitted from a polymer material with general performance to a fiber material with strong performance, and a three-dimensional skeleton network formed by fibers can effectively disperse and homogenize the applied external force, so that the concentration of the external force is avoided, the generation and expansion of cracks are avoided, the brittleness of the shell 100 is reduced, and the toughness and the impact resistance of the shell 100 are improved; at the same time, the lower density of the fiber material compared to the ceramic material is more advantageous for obtaining a lightweight housing 100. In an embodiment of the application, the fiber reinforced polymer composite layer 20 includes a polymer matrix and a fiber material dispersed in the polymer matrix.

In an embodiment of the present application, the fibrous material comprises at least one of glass fibers, carbon fibers, and polymer fibers. The glass fiber has high mechanical strength, low density and good insulating property, and can effectively improve the performance of the fiber reinforced polymer composite layer 20. The carbon fiber has low density, so that a thinner and lighter shell 100 can be manufactured, and because the carbon fiber has conductivity, the content of the carbon fiber in the fiber reinforced polymer composite layer 20 can be reduced to reduce the influence on communication signals, or the shell 100 with the carbon fiber reinforced polymer composite layer 20 is applied to equipment which does not need communication. The polymer fibers may be, but are not limited to, cellulose fibers, polytetrafluoroethylene fibers, polyphenylene ether fibers, and the like. In one embodiment, the fiber reinforced polymer composite layer 20 is a glass fiber reinforced polymer composite layer. The toughness and impact resistance of the case 100 are further improved. In an embodiment of the present application, the third polymer includes at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate. The physical and chemical properties of the polymer can be matched with the preparation process of the shell 100, decomposition cannot occur in the preparation process, the difficulty of the preparation process cannot be increased, and the production cost can be reduced. It will be appreciated that the materials of the fibrous material and the polymer may also be selected from other fibrous materials and polymers not listed above that are suitable for use in making the shell 100.

In the present embodiment, the content of the fiber material in the fiber reinforced polymer composite layer 20 is 10% to 60%. Thereby, the polymer can be strengthened better, and the toughness of the shell 100 can be further improved. In one embodiment, the fiber-reinforced polymer composite layer 20 includes 15% to 50% fiber material. In another embodiment, the content of the fiber material in the fiber reinforced polymer composite layer 20 is 20% -45%. Specifically, the content of the fiber material in the fiber reinforced polymer composite layer 20 may be, but is not limited to, 10%, 15%, 22%, 25%, 30%, 35%, 40%, 55%, or the like.

In the present application, the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30 have the ceramic material to improve the surface hardness and wear resistance of the housing 100, give the housing 100 a ceramic appearance, and have the polymer to reduce the quality of the housing 100.

In the present application, the first polymer ceramic composite layer 10 includes a first ceramic powder and a first polymer. In one embodiment of the present application, the refractive index of the first ceramic powder is greater than 2. By arranging the first ceramic powder with high refractive index, the surface glossiness of the first polymer ceramic composite layer 10 is improved, and the ceramic texture of the first polymer ceramic composite layer 10 is further improved, so that the appearance of the shell 100 is closer to that of a ceramic shell. In one embodiment, the refractive index of the first ceramic powder is greater than 2.2. In another embodiment, the refractive index of the first ceramic powder is greater than 2.3. In another embodiment of the present application, the first ceramic powder includes ZrO₂、Si₃N₄、TiO₂At least one of Si and SiC. The ceramic powder is high-temperature resistant, corrosion resistant, high in hardness and good in strength, is beneficial to being used in the shell 100, can effectively improve the strength of the shell 100, and meanwhile, the ceramic powder is high in refractive index, and can improve the ceramic texture of the shell 100. In another embodiment of the present application, the content of the first ceramic powder in the first polymer-ceramic composite layer 10 is 70% to 95%. The first polymer ceramic composite layer 10 contains a large amount of first ceramic powder, which can improve the surface hardness and improve the texture of the ceramic. In one embodiment, the content of the first ceramic powder in the first polymer-ceramic composite layer 10 is 75% to 90%. In another embodiment, the content of the first ceramic powder in the first polymer-ceramic composite layer 10 is 77% to 85%. Specifically, the content of the first ceramic powder in the first polymer ceramic composite layer 10 may be, but is not limited to, 70%, 73%, 76%, 80%, 82%, 85%, 88%, or 90%. In yet another embodiment of the present application, the first polymer comprises one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylateAt least one of them. The physical and chemical properties of the polymer can be matched with the preparation process of the shell 100, decomposition cannot occur in the preparation process, the difficulty of the preparation process cannot be increased, and the production cost can be reduced. It is understood that the materials of the first ceramic powder and the first polymer may also be selected from other ceramic powders and polymers not listed above that are suitable for preparing the housing 100.

In one embodiment of the present application, the gloss of the surface of the first polymer-ceramic composite layer 10 on the side facing away from the fiber-reinforced polymer composite layer 20 is greater than or equal to 140. The first polymer ceramic composite layer 10 has high glossiness, thereby contributing to enhancing the ceramic texture of the case 100. In one embodiment, the glossiness of the first polymer ceramic composite layer 10 made of the first ceramic powder with the refractive index greater than 2 is greater than or equal to 140. Further, the first polymer ceramic composite layer 10 has a gloss level of 140-. Further, the first polymer ceramic composite layer 10 has a gloss of 140-. In another embodiment, the first polymer ceramic composite layer 10 is made of a first ceramic powder with a refractive index greater than 2, the content of the first ceramic powder in the first polymer ceramic composite layer 10 is greater than or equal to 70%, and the glossiness of the first polymer ceramic composite layer 10 is greater than or equal to 140. Further, the first polymer ceramic composite layer 10 has a gloss of 145 or more. The application adopts GB/T8807 and 1988 standards to carry out the detection of the glossiness.

In the present application, the second polymer-ceramic composite layer 30 includes a second ceramic powder and a second polymer. In one embodiment of the present application, the refractive index of the second ceramic powder is greater than 2. By arranging the second ceramic powder with high refractive index, the surface glossiness of the second polymer-ceramic composite layer 30 is improved, and the ceramic texture of the second polymer-ceramic composite layer 30 is improved, so that the appearance of the shell 100 is closer to that of a ceramic shell. Compared with the fiber reinforced polymer shell 100, the shell 100 provided by the application adopts ceramic powder with high refractive index, so that the ceramic texture of the shell 100 can be improved, and the glossiness can be improved. In one embodiment, the refractive index of the second ceramic powder is greater than 2.2. In another embodiment, the second ceramic powderIs greater than 2.3. In another embodiment of the present application, the second ceramic powder includes ZrO₂、Si₃N₄、TiO₂At least one of Si and SiC. The ceramic powder is high-temperature resistant, corrosion resistant, high in hardness and good in strength, is beneficial to being used in the shell 100, can effectively improve the strength of the shell 100, and meanwhile, the ceramic powder is high in refractive index, and can improve the ceramic texture of the shell 100. In another embodiment of the present application, the second ceramic powder content in the second polymer-ceramic composite layer 30 is 70% to 95%. The second polymer ceramic composite layer 30 contains a large amount of second ceramic powder, which can improve the surface hardness and improve the texture of the ceramic. In one embodiment, the content of the second ceramic powder in the second polymer-ceramic composite layer 30 is 75% to 90%. In another embodiment, the content of the second ceramic powder in the second polymer-ceramic composite layer 30 is 77% to 85%. Specifically, the content of the second ceramic powder in the second polymer-ceramic composite layer 30 may be, but not limited to, 70%, 73%, 76%, 80%, 82%, 85%, 88%, or 90%. In yet another embodiment of the present application, the second polymer includes at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate. The physical and chemical properties of the polymer can be matched with the preparation process of the shell 100, decomposition cannot occur in the preparation process, the difficulty of the preparation process cannot be increased, and the production cost can be reduced. It is understood that the materials of the second ceramic powder and the second polymer can be selected from other ceramic powders and polymers not listed above, which are suitable for preparing the housing 100.

In one embodiment of the present application, the second polymer-ceramic composite layer 30 has a gloss of 140 or more on a surface of the second polymer-ceramic composite layer facing away from the fiber-reinforced polymer composite layer 20. The second polymer-ceramic composite layer 30 has a high gloss, thereby contributing to an enhanced ceramic texture of the case 100. In one embodiment, the second polymer-ceramic composite layer 30 made of the second ceramic powder with the refractive index greater than 2 has a gloss greater than or equal to 140. Further, the second polymer-ceramic composite layer 30 has a gloss level of 140-165. Further, the second polymer-ceramic composite layer 30 has a gloss level of 140-. In another embodiment, the second ceramic powder with a refractive index greater than 2 is selected to prepare the second polymer-ceramic composite layer 30, the content of the second ceramic powder in the second polymer-ceramic composite layer 30 is greater than or equal to 70%, and the glossiness of the second polymer-ceramic composite layer 30 is greater than or equal to 140. Further, the second polymer-ceramic composite layer 30 has a gloss of 145 or more.

In the embodiment of the present application, the difference between the contents of the ceramic powder in the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30 is not greater than 10%. Further, the content difference of the ceramic powder in the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30 is not more than 5%. Furthermore, the first polymer ceramic composite layer 10 and the second polymer ceramic composite layer 30 have the same content of ceramic powder. In the present embodiment, the thicknesses of the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30 are the same. The above arrangement can improve the symmetry of the housing 100, thereby improving the stability of the overall structure.

In the embodiment of the present application, the first polymer in the first polymer-ceramic composite layer 10 is crosslinked to form a three-dimensional network structure, and the first ceramic powder is dispersed in the three-dimensional network structure; the second polymer in the second polymer-ceramic composite layer 30 is crosslinked to form a three-dimensional network structure, and the second ceramic powder is dispersed in the three-dimensional network structure. In the casing 100 that this application provided, the polymer cross-linking is three-dimensional network structure, promotes overall structure's inside cohesion and elasticity, and ceramic powder disperses in the three-dimensional network structure that the polymer cross-linking formed simultaneously, reduces ceramic powder's mobility to overall structure's intensity has been promoted. Furthermore, the first ceramic powder and the second ceramic powder are uniformly dispersed in the three-dimensional network structure. Further improving the uniformity of the performance of the housing 100.

In the embodiment of the present application, the content of the first ceramic powder in the first polymer-ceramic composite layer 10 is 70% to 95%, the content of the second ceramic powder in the second polymer-ceramic composite layer 30 is 70% to 95%, and the content of the fiber material in the fiber-reinforced polymer composite layer 20 is 10% to 60%. Therefore, the shell 100 has high hardness and high toughness, the dielectric property of the shell 100 is better, and the overall performance is improved. In an embodiment, the content of the first ceramic powder in the first polymer-ceramic composite layer 10 is 75% to 90%, the content of the second ceramic powder in the second polymer-ceramic composite layer 30 is 75% to 90%, and the content of the fiber material in the fiber-reinforced polymer composite layer 20 is 15% to 50%.

In the present embodiment, the thickness of the fiber reinforced polymer composite layer 20 is greater than the sum of the thicknesses of the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30. That is, the fiber reinforced polymer composite layer 20 having high toughness accounts for a large thickness ratio, so that the brittleness of the case 100 can be reduced, and the toughness of the case 100 can be further improved. In one embodiment, the first polymer-ceramic composite layer 10 has a thickness of 5-20% of the thickness of the shell 100, the second polymer-ceramic composite layer 30 has a thickness of 5-20% of the thickness of the shell 100, and the fiber-reinforced polymer composite layer 20 has a thickness of 60-90% of the thickness of the shell 100. The fiber reinforced polymer composite layer 20 having high toughness has a large thickness ratio, so that the brittleness of the housing 100 can be reduced, the toughness of the housing 100 is further improved, and the first polymer-ceramic composite layer 10 and the second polymer-ceramic composite layer 30 have thicknesses ratio capable of ensuring the strength of the housing 100, and improving the surface hardness and the wear resistance. Further, the thickness of the first polymer ceramic composite layer 10 accounts for 10% -15% of the thickness of the shell 100, the thickness of the second polymer ceramic composite layer 30 accounts for 10% -15% of the thickness of the shell 100, and the thickness of the fiber reinforced polymer composite layer 20 accounts for 70% -85% of the thickness of the shell 100. In yet another embodiment, the thickness ratio of the fiber reinforced polymer composite layer 20 to the first polymer-ceramic composite layer 10 is greater than 3, and the thickness ratio of the fiber reinforced polymer composite layer 20 to the second polymer-ceramic composite layer 30 is greater than 3. Thereby contributing to the improvement of the hardness and toughness of the housing 100.

Referring to fig. 2, a schematic view of the interior of the housing according to an embodiment of the present disclosure is shown, wherein the first ceramic powder is a first polymer-ceramic composite layer 10, and the first ceramic powder is uniformly dispersed in the first polymer-ceramic composite layer 10; the second polymer ceramic composite layer 30 is provided with second ceramic powder, and the second ceramic powder is uniformly dispersed in the second polymer ceramic composite layer 30; what has the fiber material is the fiber reinforced polymer composite layer 20, and the fiber overlap joint in the fiber reinforced polymer composite layer 20 forms three-dimensional network structure, improves the toughness of casing 100. In the embodiment of the present application, it can be seen by performing an electron microscope scan on the shell 100 that the polymers in the shell are crosslinked to form a network structure, and the fiber materials are overlapped to form a network structure.

In the present embodiment, the casing 100 further includes a protective layer 40, and the protective layer 40 is disposed on a surface of the first polymer-ceramic composite layer 10 away from the fiber-reinforced polymer composite layer 20, or the protective layer 40 is disposed on a surface of the second polymer-ceramic composite layer 30 away from the fiber-reinforced polymer composite layer 20. Referring to fig. 3, which is a schematic structural diagram of a housing according to another embodiment of the present disclosure, the housing 100 further includes a protective layer 40, and the protective layer 40 is disposed on a surface of the first polymer-ceramic composite layer 10 away from the fiber-reinforced polymer composite layer 20. Referring to fig. 4, which is a schematic structural diagram of a housing according to another embodiment of the present disclosure, the housing 100 further includes a protective layer 40, and the protective layer 40 is disposed on a surface of the second polymer-ceramic composite layer 30 away from the fiber-reinforced polymer composite layer 20. It will be appreciated that the housing 100 has oppositely disposed inner and outer surfaces during use, with the protective layer 40 being located on the outer surface side to provide protection during use of the housing 100. Specifically, the protective layer 40 may be, but is not limited to, an anti-fingerprint layer, a hardened layer, and the like. In another embodiment, the protective layer 40 has a thickness of 5nm to 20 nm. In yet another embodiment, the protective layer 40 comprises an anti-fingerprint layer. Optionally, the anti-fingerprint layer has a contact angle greater than 105 °. The contact angle is an important parameter for measuring the wettability of the liquid on the surface of the material, and the contact angle of the anti-fingerprint layer is larger than 105 degrees, which shows that the liquid can easily move on the anti-fingerprint layer, thereby avoiding the pollution on the surface of the anti-fingerprint layer and having excellent anti-fingerprint performance. Optionally, the anti-fingerprint layer comprises a fluorine-containing compound. Specifically, the fluorine-containing compound may be, but not limited to, fluorosilicone resin, perfluoropolyether, fluoroacrylate, and the like. Further, the anti-fingerprint layer also comprises silicon dioxide, and the friction resistance of the anti-fingerprint layer is further improved by adding the silicon dioxide. In yet another embodiment, the protective layer 40 includes a hardened layer. The surface hardness of the housing 100 is further increased by providing a hardened layer. Optionally, the material of the hardened layer includes at least one of urethane acrylate, silicone resin, and perfluoropolyether acrylate.

In the present embodiment, the first polymer-ceramic composite layer 10 and/or the second polymer-ceramic composite layer 30 have a colorant therein, so that the surface of the housing 100 has a different color appearance, thereby improving the visual effect. Specifically, the colorant may be, but is not limited to, at least one selected from the group consisting of iron oxide, cobalt oxide, cerium oxide, nickel oxide, bismuth oxide, zinc oxide, manganese oxide, chromium oxide, copper oxide, vanadium oxide, and tin oxide, respectively. In an embodiment, the mass content of the colorant in the first polymer-ceramic composite layer 10 is less than or equal to 10%, and/or the mass content of the colorant in the second polymer-ceramic composite layer 30 is less than or equal to 10%. Thereby not only improving the appearance effect, but also not influencing the content of the ceramic powder. Further, the mass content of the colorant in the first polymer-ceramic composite layer 10 is 0.5% to 10%, and/or the mass content of the colorant in the second polymer-ceramic composite layer 30 is 0.5% to 10%.

In the present application, the thickness of the housing 100 may be selected according to the requirements of the application scenario, which is not limited herein; for example, when the housing 100 is used as a rear cover of a mobile phone, the thickness of the housing 100 may be, but is not limited to, 0.6mm to 1.2 mm.

In the present embodiment, the density of the case 100 is more than 1g/cm³And less than 2.4g/cm³. The housing 100 has a low density and a light weight, which is advantageous for application. In one embodiment, the density of the housing 100 is 1.5g/cm³-2.35g/cm³. Further, the density of the case 100 is 1.8g/cm³-2.2g/cm³. Further, the density of the case 100 is 1.9g/cm³-2.1g/cm³。

In the present application, the performance of the housing 100 is tested by a ball drop impact test, wherein the ball drop is a 32g stainless steel ball, and the thickness of the housing 100 is 0.8 mm. In one embodiment, the casing 100 is supported on a jig, wherein the periphery of the casing 100 is supported by 3mm, and the middle part of the casing is suspended; and (3) freely dropping a 32g stainless steel ball from a certain height to a point to be detected on the surface of the shell 100 to be detected, and recording the height of crushing the shell 100 as the ball dropping height. Further, a 32g stainless steel ball is freely dropped from a certain height to five detection points including four corners and the center of the surface of the casing 100 to be measured, and the height for crushing the casing 100 is recorded as the ball drop height. In the embodiment of the application, the falling ball height is 40cm-120 cm. Further, the content of the first ceramic powder in the first polymer ceramic composite layer 10 is 70% -95%, the content of the second ceramic powder in the second polymer ceramic composite layer 30 is 70% -95%, the content of the fiber material in the fiber reinforced polymer composite layer 20 is 10% -60%, and the ball drop height of the shell 100 is 80cm-120 cm. Furthermore, the content of the first ceramic powder in the first polymer ceramic composite layer 10 is 70% -95%, the content of the second ceramic powder in the second polymer ceramic composite layer 30 is 70% -95%, the content of the fiber material in the fiber reinforced polymer composite layer 20 is 10% -60%, the thickness of the first polymer ceramic composite layer 10 accounts for 5% -20% of the thickness of the shell 100, the thickness of the second polymer ceramic composite layer 30 accounts for 5% -20% of the thickness of the shell 100, the thickness of the fiber reinforced polymer composite layer 20 accounts for 60% -90% of the thickness of the shell 100, and the ball drop height of the shell 100 is 90cm-120 cm.

The porosity of the shell 100 is detected by adopting the GB/T25995-2010 standard. In the present embodiment, the porosity of the casing 100 is less than 5%. I.e. the density of the shell 100 is greater than or equal to 95%. The low porosity of the housing 100 ensures the bonding strength inside the housing 100, which is beneficial to improving the mechanical performance of the housing 100. Further, the porosity of the case 100 is less than 1%. Further increasing the compactness of the housing 100.

In the present embodiment, the surface roughness of the case 100 is less than 0.1 μm. By providing the housing 100 with small surface roughness, the surface glossiness and ceramic texture of the housing can be enhanced, and the visual effect can be improved. Further, the surface roughness of the case 100 is 0.02 μm to 0.08 μm.

The application provides a casing 100 of sandwich structure, inside fiber reinforcement polymer composite layer 20 promotes the toughness of casing 100, and outside first polymer ceramic composite layer 10 and second polymer ceramic composite layer 30 improve hardness and wear resistance, promote the comprehensive properties of casing 100 by a wide margin to casing 100 is light in quality, dielectric properties is good, has ceramic feel outward appearance, is favorable to its use.

Referring to fig. 5, a flowchart of a method for manufacturing a housing according to an embodiment of the present disclosure is shown, where the method for manufacturing the housing 100 according to any of the embodiments includes:

s101: the first polymer ceramic sheet, the fiber reinforced polymer sheet and the second polymer ceramic sheet are sequentially stacked to form a stacked structure.

S102: and pressing the stacked structure to obtain the shell.

The preparation method of the shell 100 provided by the application is simple to operate, is easy for large-scale production, can prepare the shell 100 with excellent performance, and is beneficial to application of the shell.

In S101, the first polymer ceramic sheet, the fiber-reinforced polymer sheet, and the second polymer ceramic sheet are sequentially stacked to obtain a stacked structure.

Before S101, the method further includes providing a first polymer ceramic sheet, a fiber reinforced polymer sheet, and a second polymer ceramic sheet.

In an embodiment of the present application, providing a first polymer ceramic sheet includes: mixing the first ceramic powder with a first surface modifier, and drying to obtain modified first ceramic powder; after the modified first ceramic powder is blended with a first polymer, a first injection molding feed is formed through closed milling and granulation; the first injection molding feed is subjected to injection molding to form a first polymer ceramic sheet.

In an embodiment of the present application, providing the second polymer ceramic sheet comprises: mixing the second ceramic powder with a second surface modifier, and drying to obtain modified second ceramic powder; after the modified second ceramic powder is blended with a second polymer, a second injection molding feed is formed through closed milling and granulation; and the second injection molding feed is subjected to injection molding to form a second polymer ceramic sheet.

In an embodiment of the present application, providing a fiber reinforced polymer sheet includes: mixing the fiber material with a third surface modifier, and drying to obtain a modified fiber material; after the fiber material is blended with a third polymer, a third injection molding feed is formed through milling granulation; the third injection feed is injection molded to form a fiber reinforced polymer sheet.

Referring to fig. 6, a flowchart of a method for manufacturing a housing according to another embodiment of the present disclosure is substantially the same as that shown in fig. 5, except that before S101, the method further includes:

s1001: mixing the first ceramic powder with a first surface modifier, and drying to obtain modified first ceramic powder; after the modified first ceramic powder is blended with a first polymer, a first injection molding feed is formed through closed milling and granulation; the first injection molding feed is subjected to injection molding to form a first polymer ceramic sheet.

S1002: mixing the second ceramic powder with a second surface modifier, and drying to obtain modified second ceramic powder; after the modified second ceramic powder is blended with a second polymer, a second injection molding feed is formed through closed milling and granulation; and the second injection molding feed is subjected to injection molding to form a second polymer ceramic sheet.

S1003: mixing the fiber material with a third surface modifier, and drying to obtain a modified fiber material; blending the modified fiber material and a third polymer, and then carrying out milling granulation to form a third injection molding feed; the third injection feed is injection molded to form a fiber reinforced polymer sheet.

It is understood that the sequence of the steps in the flow chart of the preparation method provided by the application is not limited.

In the present application, the first surface modifier may include, but is not limited to, at least one of a coupling agent, a surfactant, a silicone, a dispersant, etc., and the first surface modifier may be selected according to the properties of the first polymer. In an embodiment, a coupling agent may be selected to modify the first ceramic powder, and the coupling agent may be, but is not limited to, a silane coupling agent, a titanate coupling agent, and the like. In another embodiment, the mass ratio of the first surface modifier to the first ceramic powder is 0.5% -3%. Thereby the surface modification of the first ceramic powder can be completed,and does not cause agglomeration between the first surface modifying agents. Further, the mass ratio of the first surface modifier to the first ceramic powder is 1-2.5%. Specifically, the mass ratio of the first surface modifier to the first ceramic powder may be, but is not limited to, 0.8%, 1.3%, 1.5%, 1.7%, 2%, 2.4%, 2.5%, or the like. In another embodiment, the particle size D50 of the first ceramic powder is 500nm-2 mm. By adopting the first ceramic powder with the particle size, the strength and hardness of the shell 100 can be improved, and meanwhile, the brittleness of the shell 100 cannot be excessively increased. Optionally, the particle size D50 of the first ceramic powder is 800nm-500 μm. Furthermore, the grain diameter D50 of the first ceramic powder is 1-100 μm. Furthermore, the grain diameter D50 of the first ceramic powder is 2-10 μm. In yet another embodiment, the refractive index of the first ceramic powder is greater than 2. Thereby helping the surface of the shell 100 to realize the warm and moist texture and luster of the ceramic, having the same visual effect as the ceramic shell, but having lighter weight and better performance. Optionally, the first ceramic powder comprises Al₂O₃、ZrO₂、Si₃N₄、SiO₂、TiO₂At least one of AlN, SiC and Si. In a specific embodiment, the first surface modifier is dissolved in an alcohol solvent, water or an alcohol-water mixed solvent, and the first ceramic powder is added, mixed and dried to obtain the modified first ceramic powder. In yet another embodiment, the first polymer includes at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate, although other suitable polymers for the housing 100 may also be selected. In one embodiment, when the first polymer is polyphenylene sulfide, a coupling agent having an epoxy group may be selected to modify the first ceramic powder. Thereby being beneficial to better compatibility and mixing between the modified first ceramic powder and the polyphenylene sulfide polymer. It is understood that the mixing ratio of the first polymer and the first modified ceramic powder can be selected according to the content of the ceramic powder in the first polymer-ceramic composite layer 10 in the shell 100, and is not limited thereto. In one embodiment, the mass ratio of the first ceramic powder to the first polymer is 1 to 10. Thereby making it possible to obtain a first polymer having high gloss, a high ceramic texture, and both hardness and toughnessA ceramic composite layer 10. In another embodiment, when the mass ratio of the modified first ceramic powder to the first polymer is greater than 4:1, the first polymer-ceramic composite layer 10 with high surface hardness, strong ceramic texture and high glossiness can be obtained through the subsequent processes.

In the present application, the second surface modifier may include, but is not limited to, at least one of a coupling agent, a surfactant, a silicone, a dispersant, etc., and may be selected according to the properties of the second polymer. In an embodiment, a coupling agent may be selected to modify the second ceramic powder, and the coupling agent may be, but is not limited to, a silane coupling agent, a titanate coupling agent, and the like. In another embodiment, the mass ratio of the second surface modifier to the second ceramic powder is 0.5% -3%. Therefore, the surface modification of the second ceramic powder can be completed, and the agglomeration of the second surface modifiers can not be caused. Further, the mass ratio of the second surface modifier to the second ceramic powder is 1-2.5%. Specifically, the mass ratio of the second surface modifier to the second ceramic powder may be, but is not limited to, 0.8%, 1.3%, 1.5%, 1.7%, 2%, 2.4%, 2.5%, or the like. In another embodiment, the particle size D50 of the second ceramic powder is 500nm-2 mm. By adopting the second ceramic powder with the particle size, the strength and hardness of the shell 100 can be improved, and meanwhile, the brittleness of the shell 100 cannot be excessively increased. Optionally, the particle size D50 of the second ceramic powder is 800nm-500 μm. Furthermore, the grain diameter D50 of the second ceramic powder is 1-100 μm. Furthermore, the grain diameter D50 of the second ceramic powder is 2-10 μm. In yet another embodiment, the refractive index of the second ceramic powder is greater than 2. Thereby helping the surface of the shell 100 to realize the warm and moist texture and luster of the ceramic, having the same visual effect as the ceramic shell, but having lighter weight and better performance. Optionally, the second ceramic powder comprises Al₂O₃、ZrO₂、Si₃N₄、SiO₂、TiO₂At least one of AlN, SiC and Si. In a specific embodiment, the second surface modifier is dissolved in an alcohol solvent, water or an alcohol-water mixed solvent, and the second ceramic powder is added, mixed and dried to obtain the modified second ceramic powder. In yet another embodimentIn the example, the second polymer includes at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate, although other polymers suitable for the housing 100 may be selected. In one embodiment, when the second polymer is polyphenylene sulfide, a coupling agent with an epoxy group can be selected to modify the second ceramic powder. Thereby being beneficial to better compatibility and mixing between the modified second ceramic powder and the polyphenylene sulfide polymer. It is understood that the mixing ratio of the second polymer and the second modified ceramic powder can be selected according to the content of the ceramic powder in the second polymer-ceramic composite layer 30 in the shell 100, and is not limited thereto. In one embodiment, the mass ratio of the second ceramic powder to the second polymer is 1-10. Thus, the second polymer-ceramic composite layer 30 having high glossiness, high ceramic texture, and both hardness and toughness can be obtained. In another embodiment, when the mass ratio of the modified second ceramic powder to the second polymer is greater than 4:1, the second polymer-ceramic composite layer 30 with high surface hardness, strong ceramic texture and high glossiness can be obtained through the subsequent processes. In the present application, the first polymer ceramic sheet and the second polymer ceramic sheet may be the same or different in material, material ratio, and thickness, which is not limited herein.

In the present application, the third surface modifier may include, but is not limited to, at least one of a coupling agent, a surfactant, a silicone, a dispersant, etc., and may be selected according to the properties of the third polymer. In one embodiment, a coupling agent may be selected to modify the fiber material, and may be, but is not limited to, a silane coupling agent, a titanate coupling agent, and the like. In another embodiment, the mass ratio of the third surface modifier to the fibrous material is from 0.5% to 3%. Thereby, the surface modification of the fiber material can be completed without causing agglomeration between the third surface modifiers. Further, the mass ratio of the third surface modifier to the fiber material is 1-2.5%. Specifically, the mass ratio of the third surface modifier to the fiber material can be, but is not limited to, 0.8%, 1.2%, 1.5%, 1.9%, 2%, 2.3%, or 2.4%, etc. In a specific embodiment, the third surface modifier is dissolved in an alcohol solvent, water or an alcohol-water mixed solvent, and the fiber material is added, mixed and dried to obtain the modified fiber material. In yet another embodiment, the fibrous material comprises at least one of glass fibers, carbon fibers, and polymer fibers. For example, the fiber reinforced polymer composite layer 20 is a glass fiber reinforced polymer composite layer 20. The toughness and impact resistance of the case 100 are further improved. In yet another embodiment, the fiber material has a diameter of 0.5 μm to 10 μm and a length of 5 μm to 200 μm. Thereby being beneficial to improving the toughness of the fiber material and reducing the brittleness, and the specific surface area of the fiber material is proper and is beneficial to uniform dispersion. Further, the fiber material has a diameter of 1 μm to 8 μm and a length of 20 μm to 150 μm. In yet another embodiment, the third polymer includes at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate, although other suitable polymers for the housing 100 may also be selected. In a specific embodiment, when the third polymer is polyphenylene sulfide, a coupling agent having an epoxy group can be selected to modify the fiber material. Thereby being beneficial to better compatibility and mixing between the modified fiber material and the polyphenylene sulfide polymer. It is understood that the mixing ratio of the third polymer and the third modified fiber material may be selected according to the content of the fiber material in the fiber reinforced polymer composite layer 20 in the shell 100, and is not limited thereto.

In one embodiment of the present application, blending comprises milling by dry or wet methods. Furthermore, the blending is carried out by a dry method, so that the efficiency is improved. In a specific embodiment, the modified first ceramic powder, the first polymer and the ball-milling beads are put into a dry ball mill together for milling for 2h-10 h; putting the modified second ceramic powder, the second polymer and the ball-milling beads into a dry ball mill together for grinding for 2-10 h; and (3) putting the modified fiber material, the third polymer and the ball-milling beads into a dry ball mill together for grinding for 2-10 h.

In the present application, banburying granulation is advantageous for the injection molding process, for example, the blended mixture can be placed in a banburying granulation machine for banburying granulation. In one embodiment, the temperature for banbury granulation is above the melting point of the polymer selected and below the decomposition temperature of the polymer selected. Specifically, the temperature for banburying granulation can be but is not limited to 200-350 ℃, and the time for banburying granulation can be but is not limited to 1-12 h. Furthermore, the banburying process is in a negative pressure state, and the absolute value of the pressure is less than 0.01MPa, so that the selected polymer can be effectively prevented from being oxidized, and the elimination of gas generated by side reaction can be effectively promoted. In another embodiment, the first injection feed, the second injection feed and the third injection feed each have a diameter of 2mm to 3mm and a length of 3mm to 4 mm. Thereby facilitating the injection molding.

In the present application, the injection molding temperature may be selected according to the properties of the selected polymer, for example, the injection molding temperature may be, but is not limited to, 200 ℃ to 350 ℃; as another example, when polyphenylene sulfide is selected, the injection molding temperature can be 290 ℃ to 330 ℃. The thicknesses of the first polymer ceramic sheet, the second polymer ceramic sheet and the fiber reinforced polymer sheet obtained by injection molding can be selected according to needs, and the thicknesses can be reduced in the subsequent pressing and processing processes, so that the thicknesses can be increased during injection molding. In the application, the injection molding method is simpler to operate, and compared with tape casting, the compatibility problem between a solvent and a polymer does not need to be considered, so that the preparation cost is low. It is understood that the first polymer ceramic sheet, the second polymer ceramic sheet and the fiber reinforced polymer sheet may be prepared by other forming methods such as tape casting.

The first polymer ceramic piece and the second polymer ceramic piece prepared by the method are beneficial to fully mixing the polymer and the ceramic powder, and are beneficial to the subsequent pressing, the internal bonding force is improved, and the ceramic powder in the whole structure is uniformly dispersed in the polymer after the polymer is crosslinked; compared with a method for soaking a ceramic blank into a polymer solution, the method enables the polymer to be dispersed more uniformly, the polymer can better wrap ceramic powder, the ceramic powder is prevented from moving, and the strength is improved; the fiber reinforced polymer sheet prepared by the method is beneficial to fully mixing the polymer and the fiber material, is beneficial to the subsequent pressing, improves the internal binding force and improves the toughness.

In S102, the stitching stack structure includes: the stacked structure is subjected to warm isostatic pressing and thermocompression bonding. Reducing the porosity inside the stacked structure through warm isostatic pressing, and enhancing the acting force among the ceramic powder, the fiber material and the polymer; the internal molecular chains of the polymer move through hot-pressing adhesion to generate crosslinking, so that a three-dimensional network structure is formed, and the internal binding force is improved.

The isostatic pressing technique is a technique of molding a product in a closed high-pressure vessel under an ultrahigh pressure condition having a uniform pressure. The isostatic pressing technology is divided into three different types, namely cold isostatic pressing, warm isostatic pressing and hot isostatic pressing according to the temperature during molding and consolidation. In this application, the temperature of the warm isostatic press is greater than the glass transition temperature of the polymer. Therefore, the polymer in the stacked structure can be softened, and the compactness is better under the action of pressure, so that air holes in the stacked structure are eliminated, and the binding force among the ceramic powder, the fiber material and the polymer is improved. In one embodiment, the pressure of the warm isostatic pressing is 50MPa-500MPa, so that the full compaction of the stacked structure is facilitated, and the process has low requirements on equipment and good safety, and is more beneficial to practical operation and application. Furthermore, the pressure of the warm isostatic pressing is 100MPa-400 MPa. In the present application, the time of the warm isostatic pressing may be selected depending on the thickness of the stacked structure. In one embodiment, the temperature of the warm isostatic pressing is 80-300 ℃, the time of the warm isostatic pressing is 0.5-2 h, and the pressure of the warm isostatic pressing is 50-500 MPa. Therefore, the porosity of the stacked structure can be further reduced, and the internal bonding force is improved. In one embodiment, the stack may be placed in a sheath, the gases adsorbed on the surface and internal voids of the green body and within the sheath are evacuated, and the vacuum sealed and placed in a pressure vessel with a heating furnace for isothermal and isostatic pressing.

In the application, the polymer is in a molten state in the hot-press bonding process, for example, the temperature of the hot-press bonding can be close to the melting point of the polymer, and meanwhile, under the action of pressure, molecular chains of the molten polymer move and interweave to generate a blocking effect. In one embodiment, the pressure of the thermocompression bonding is 5MPa to 50 MPa. Thereby being beneficial to fully compacting the structure and promoting the polymer to be crosslinked, and meanwhile, the process has low requirements on equipment and good safety and is more beneficial to actual operation and application. Furthermore, the pressure of the hot-pressing adhesion is 10MPa-40 MPa. In one embodiment, the hot-press bonding temperature is 150-350 ℃, the hot-press bonding time is 5-30 min, and the hot-press bonding pressure is 5-50 MPa. Thereby further improving the crosslinking degree of the polymer and improving the internal bonding force.

In the embodiments of the present application, heat treatment is further included after the thermocompression bonding. The heat treatment further promotes the polymer molecular chain to carry out reactions such as chain extension, crosslinking and the like, realizes the effective regulation and control of crystallinity and crosslinking degree, and further improves the toughness. In the present application, the heat treatment temperature is determined by the specific crystallization, crosslinking and degradation properties of the selected polymer; for example, the heat treatment temperature is greater than the melting temperature of the polymer and less than the decomposition temperature of the polymer. In one embodiment, the temperature of the heat treatment is 100-350 ℃, and the time of the heat treatment is 5-48 h. In one embodiment, when the polymer is polyphenylene sulfide, the heat treatment can be carried out at a temperature of 100 ℃ to 350 ℃ for 5h to 48 h. Further, the temperature of the heat treatment is 270-350 ℃. Specifically, the heat treatment may be carried out in an inert atmosphere or in air, and oxidative crosslinking may occur.

In an embodiment of the present application, the method for manufacturing the housing 100 further includes performing computer numerical control precision machining (CNC machining) on the housing 100. The final desired assembled fit of the housing 100 is obtained by CNC machining. For example, the housing 100 is made more flat by CNC machining, etc. In another embodiment of the present application, the method for preparing the housing 100 further includes polishing the housing 100. By polishing and grinding the surface of the casing 100, the roughness of the surface of the casing 100 is reduced, and the ceramic texture of the surface of the casing 100 is improved. In one embodiment, the surface roughness of the housing 100 is less than 0.1 μm. By providing the housing 100 with small surface roughness, the surface glossiness and ceramic texture of the housing can be enhanced, and the visual effect can be improved. Further, the surface roughness of the case 100 is 0.02 μm to 0.08 μm. In another embodiment of the present application, a protective material may be sprayed or evaporated on the surface of the housing 100 to form the protective layer 40. In an embodiment, the anti-fingerprint material is evaporated on the surface of the casing 100 to form an anti-fingerprint layer, so as to improve the anti-fingerprint effect of the casing 100.

The present application further provides an electronic device 200 comprising the housing 100 of any of the above embodiments. It is understood that the electronic device 200 may be, but is not limited to, a cell phone, a tablet computer, a notebook computer, a watch, an MP3, an MP4, a GPS navigator, a digital camera, etc. Please refer to fig. 7, which is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, wherein the electronic device 200 includes a housing 100. The case 100 can improve the surface hardness and wear resistance of the electronic device 200, improve toughness and impact resistance, give the electronic device 200 a ceramic-like appearance, and improve the product competitiveness of the electronic device 200 without increasing the weight of the electronic device 200 too much. Referring to fig. 8, which is a schematic view illustrating a structure of an electronic device according to an embodiment of the present disclosure, a structure of the electronic device 200 may include an RF circuit 210, a memory 220, an input unit 230, a display unit 240, a sensor 250, an audio circuit 260, a WiFi module 270, a processor 280, a power supply 290, and the like. The RF circuit 210, the memory 220, the input unit 230, the display unit 240, the sensor 250, the audio circuit 260, and the WiFi module 270 are respectively connected to the processor 280; the power supply 290 is used to supply power to the entire electronic device 200. Specifically, the RF circuit 210 is used for transmitting and receiving signals; the memory 220 is used for storing data instruction information; the input unit 230 is used for inputting information, and may specifically include other input devices such as a touch panel and operation keys; the display unit 240 may include a display screen or the like; the sensor 250 includes an infrared sensor, a laser sensor, etc. for detecting a user approach signal, a distance signal, etc.; the speaker 261 and the microphone 262 are connected with the processor 280 through the audio circuit 260 and used for emitting and receiving sound signals; the WiFi module 270 is configured to receive and transmit WiFi signals; the processor 280 is used for processing data information of the electronic device 200.

Example 1

The shell comprises a first polymer ceramic composite layer and a fiber reinforced polymer composite layer which are arranged in a laminated mannerAnd a second polymer ceramic composite layer, the first polymer ceramic composite layer is made of ZrO₂And Polyphenylene Sulfide (PPS), ZrO in the first polymer-ceramic composite layer₂Is 80%, the second polymer ceramic composite layer is made of ZrO₂And PPS, ZrO in a second Polymer ceramic composite layer₂The content of the glass fiber reinforced polymer composite layer is 80%, the material of the fiber reinforced polymer composite layer is glass fiber and PPS, and the content of the glass fiber in the fiber reinforced polymer composite layer is 40%; the thickness of the first polymer ceramic composite layer accounts for 20% of the total thickness of the shell, the thickness of the second polymer ceramic composite layer accounts for 20% of the total thickness of the shell, and the thickness of the fiber reinforced polymer composite layer accounts for 60% of the total thickness of the shell.

Example 2

The same as in example 1, except that the glass fiber content in the fiber-reinforced polymer composite layer was 10%.

Example 3

The same as in example 1, except that the glass fiber content in the fiber-reinforced polymer composite layer was 60%.

Example 4

The same as in example 1, except that the glass fiber content in the fiber-reinforced polymer composite layer was 80%.

Example 5

The same as in example 1, except that the glass fiber content in the fiber-reinforced polymer composite layer was 2%.

Example 6

Substantially the same as in example 1, except that ZrO in the first polymer ceramic composite layer₂Is 70%, ZrO in the second polymer-ceramic composite layer₂The content of (B) is 70%.

Example 7

Substantially the same as in example 1, except that ZrO in the first polymer ceramic composite layer₂Is 95%, ZrO in the second polymer-ceramic composite layer₂The content of (B) is 95%.

Example 8

Substantially the same as in example 1, except that ZrO in the first polymer ceramic composite layer₂The content of (B) is 40%.

Example 9

Substantially the same as in example 1, except that ZrO in the second composite ceramic layer was contained₂The content of (B) is 40%.

Example 10

Substantially the same as in example 1, except that ZrO in the first polymer ceramic composite layer₂The content of (B) is 98%.

Example 11

Substantially the same as in example 1, except that ZrO in the second composite ceramic layer was contained₂The content of (B) is 98%.

Example 12

The difference from example 1 is that the thickness of the first polymer-ceramic composite layer accounts for 15% of the total thickness of the case, the thickness of the second polymer-ceramic composite layer accounts for 15% of the total thickness of the case, and the thickness of the fiber-reinforced polymer composite layer accounts for 70% of the total thickness of the case.

Example 13

The difference from example 1 is that the thickness of the first polymer-ceramic composite layer accounts for 5% of the total thickness of the case, the thickness of the second polymer-ceramic composite layer accounts for 5% of the total thickness of the case, and the thickness of the fiber-reinforced polymer composite layer accounts for 90% of the total thickness of the case.

Example 14

The difference from example 1 is that the thickness of the first polymer-ceramic composite layer accounts for 35% of the total thickness of the case, the thickness of the second polymer-ceramic composite layer accounts for 35% of the total thickness of the case, and the thickness of the fiber-reinforced polymer composite layer accounts for 30% of the total thickness of the case.

Example 15

The difference from example 1 is that the thickness of the first polymer-ceramic composite layer accounts for 2.5% of the total thickness of the case, the thickness of the second polymer-ceramic composite layer accounts for 2.5% of the total thickness of the case, and the thickness of the fiber-reinforced polymer composite layer accounts for 95% of the total thickness of the case.

Example 16

Substantially the same as in example 1, except that the fiber-reinforced polymer composite layer was made of carbon fiber and PPS, and the carbon fiber content in the fiber-reinforced polymer composite layer was 40%.

Comparative example 1

A shell, the material of the shell is ZrO₂And PPS, ZrO in the casing₂The content of (B) is 80%.

Comparative example 2

The shell is made of glass fiber and PPS, and the content of the glass fiber in the shell is 40%.

Comparative example 3

The shell is made of carbon fibers and PPS, and the content of the carbon fibers in the shell is 40%.

Performance detection

The glossiness of the surfaces of the casings provided in the above examples and comparative examples was measured by using GB/T8807-1988; providing the shells in the embodiments and the comparative examples, wherein the sizes of the shells are 150mm × 73mm × 0.8mm, respectively supporting the shells on a jig (four sides are respectively provided with 3mm supports, and the middle part is suspended), using a 32g stainless steel ball to freely fall to the surface to be measured from a certain height, measuring the four corners and the center of each shell for 5 times until the shells are broken, and recording the height of the falling balls; the densities of the cases of the examples and comparative examples of the same size were measured at the same time, and the results are shown in table 1.

TABLE 1 Performance test results

The glossiness and the ceramic texture of the surface of the shell are reflected by detecting the glossiness, and the toughness and the impact resistance of the shell can be reflected by detecting the falling ball height. It can be seen that the shell provided by comparative example 1 has a high density, a heavy weight, good gloss and poor toughness; the shell provided by the comparative example 2 is small in density, light in weight, low in glossiness and good in toughness, the density and the toughness of the shells provided by the examples 1 to 15 are superior to those of the shell provided by the comparative example 1, and the glossiness is superior to that of the shell provided by the comparative example 2; compared with comparative example 3, the case provided in example 16 of the present application has good glossiness; therefore, the shell provided by the application has the advantages of low density, contribution to preparation of a light shell, high glossiness, strong ceramic texture on the surface of the shell, high toughness, good impact resistance, excellent comprehensive performance and contribution to application of the shell.

The foregoing detailed description has provided for the embodiments of the present application, and the principles and embodiments of the present application have been presented herein for purposes of illustration and description only and to facilitate understanding of the methods and their core concepts; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A casing comprising a first polymer-ceramic composite layer and a second polymer-ceramic composite layer, and a fiber-reinforced polymer composite layer disposed between the first polymer-ceramic composite layer and the second polymer-ceramic composite layer.

2. The housing of claim 1, wherein the fiber reinforced polymer composite layer includes a fiber material and a third polymer, and wherein the fiber material is present in the fiber reinforced polymer composite layer in an amount of 10% to 60%.

3. The housing of claim 2, wherein the fibrous material comprises at least one of glass fibers, carbon fibers, and polymer fibers, and the third polymer comprises at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate.

4. The housing of claim 1, wherein a surface of the first polymer-ceramic composite layer on a side remote from the fiber-reinforced polymer composite layer has a gloss of 140 or more, and a surface of the second polymer-ceramic composite layer on a side remote from the fiber-reinforced polymer composite layer has a gloss of 140 or more.

5. The housing of claim 1, wherein the first polymer-ceramic composite layer comprises a first ceramic powder and a first polymer, wherein the second polymer-ceramic composite layer comprises a second ceramic powder and a second polymer, and wherein the refractive indices of the first ceramic powder and the second ceramic powder are greater than 2.

6. The housing of claim 5, wherein the first polymer-ceramic composite layer comprises 70% to 95% of the first ceramic powder, and the second polymer-ceramic composite layer comprises 70% to 95% of the second ceramic powder.

7. The housing of claim 5, wherein a content of the first ceramic powder in the first polymer-ceramic composite layer is the same as a content of the second ceramic powder in the second polymer-ceramic composite layer; the first polymer-ceramic composite layer and the second polymer-ceramic composite layer have the same thickness.

8. The housing of claim 5, wherein the first ceramic powder and the second ceramic powder are independently selected from ZrO₂、Si₃N₄、TiO₂At least one of Si and SiC, the first polymer and the second polymer being independently selected from at least one of polyphenylene sulfide, polycarbonate, polyamide and polymethyl methacrylate.

9. The housing of claim 1, wherein a thickness of the fiber reinforced polymer composite layer is greater than a sum of thicknesses of the first polymer-ceramic composite layer and the second polymer-ceramic composite layer.

10. The shell according to claim 9, wherein the first polymer-ceramic composite layer has a thickness of 5% to 20% of the shell thickness, the second polymer-ceramic composite layer has a thickness of 5% to 20% of the shell thickness, and the fiber-reinforced polymer composite layer has a thickness of 60% to 90% of the shell thickness.

11. The casing of claim 1, further comprising a protective layer disposed on a surface of the first polymer-ceramic composite layer on a side away from the fiber-reinforced polymer composite layer or on a surface of the second polymer-ceramic composite layer on a side away from the fiber-reinforced polymer composite layer.

12. A method of making a housing, comprising:

and pressing the stacked structure to obtain the shell.

13. The method of manufacturing of claim 12, wherein pressing the stacked structure comprises:

carrying out warm isostatic pressing and hot-pressing bonding on the stacked structure, wherein the temperature of the warm isostatic pressing is 80-300 ℃, the time of the warm isostatic pressing is 0.5-2 h, and the pressure of the warm isostatic pressing is 50-500 MPa; the hot-press bonding temperature is 150-350 ℃, the hot-press bonding time is 5-30 min, and the hot-press bonding pressure is 5-50 MPa.

14. The method of claim 13, further comprising a heat treatment after the thermocompression bonding, wherein the heat treatment temperature is 100 ℃ to 350 ℃, and the heat treatment time is 5h to 48 h.

15. The method of making of claim 12, wherein providing the first polymeric ceramic sheet comprises: mixing the first ceramic powder with a first surface modifier, and drying to obtain modified first ceramic powder; after the modified first ceramic powder is blended with a first polymer, a first injection molding feed is formed through closed milling and granulation; the first injection molding feed is subjected to injection molding to form the first polymer ceramic sheet;

providing the second polymeric ceramic sheet comprises: mixing the second ceramic powder with a second surface modifier, and drying to obtain modified second ceramic powder; after the modified second ceramic powder is blended with a second polymer, a second injection molding feed is formed through closed milling and granulation; and the second injection molding feed is subjected to injection molding to form the second polymer ceramic sheet.

16. The method of claim 15, wherein the first ceramic powder and the second ceramic powder are independently selected from ZrO₂、Si₃N₄、TiO₂At least one of Si and SiC, wherein the grain diameter D50 of the first ceramic powder is 500nm-2mm, and the grain diameter D50 of the second ceramic powder is 500nm-2 mm; the first polymer and the second polymer are independently selected from at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate.

17. The method of making of claim 12, wherein providing the fiber reinforced polymer sheet comprises:

mixing the fiber material with a third surface modifier, and drying to obtain a modified fiber material;

after the modified fiber material is blended with a third polymer, a third injection molding feed is formed through milling granulation;

the third injection feed is injection molded to form the fiber reinforced polymer sheet.

18. The method of claim 17, wherein the fibrous material comprises at least one of glass fibers, carbon fibers, and polymer fibers; the diameter of the fiber material is 0.5-10 μm, and the length is 5-200 μm; the third polymer includes at least one of polyphenylene sulfide, polycarbonate, polyamide, and polymethyl methacrylate.

19. An electronic device, characterized in that it comprises a housing according to any one of claims 1-11.