WO2022001828A1

WO2022001828A1 - Ceramic-like material, preparation method therefor, and application thereof

Info

Publication number: WO2022001828A1
Application number: PCT/CN2021/102127
Authority: WO
Inventors: 张玲玲; 刘芳; 林信平
Original assignee: 比亚迪股份有限公司
Priority date: 2020-06-29
Filing date: 2021-06-24
Publication date: 2022-01-06
Also published as: CN113929350B; CN113929350A

Abstract

Disclosed are a ceramic-like material, a preparation method therefor, and an application thereof. The ceramic-like material comprises 30-60 parts by weight of aluminum oxide, 5-20 parts by weight of silicon oxide, 5-20 parts by weight of zirconium oxide, and 20-30 parts by weight of an organic high-polymer material.

Description

Imitation ceramic material and preparation method and application thereof

priority information

This disclosure requests the priority of the Chinese patent application with the patent application number 202010604273.2 and the application title "Imitation ceramic material and its preparation method and application" submitted to the State Intellectual Property Office of China on June 29, 2020, and the entire contents Incorporated in this disclosure by reference.

technical field

Ceramics have become one of the materials for mobile phone casings in the 5G era due to their excellent properties such as wear resistance, high temperature resistance, corrosion resistance and excellent appearance. However, the poor drop resistance of ceramics limits the application of ceramics as mobile phone casings. Plastics have excellent properties such as low dielectric constant and good toughness, and are widely used in mobile phone backplanes. The plastic backplane has poor temperature resistance and stability, and is not resistant to wear, and the appearance of plastic materials can no longer meet consumers' requirements for the appearance of mobile phones. Therefore, a ceramic imitation material is needed, which has the texture of ceramics and the excellent performance of plastics, so as to achieve lightweight and adapt to the 5G era.

public content

The purpose of the present disclosure is to overcome the above-mentioned problems in the prior art, and to provide an imitation ceramic material, a preparation method and application thereof, the imitation ceramic material has high strength, good impact resistance, and good porcelain effect, thereby When it is used in the housing of electronic products, consumers' requirements for the appearance of electronic products can be met.

A first aspect of the present disclosure is to provide a ceramic-like material. According to an embodiment of the present disclosure, the imitation ceramic material includes 30-60 parts by weight of alumina, 5-20 parts by weight of silicon oxide, 5-20 parts by weight of zirconia, and 20-30 parts by weight of organic polymer material .

According to some embodiments of the present disclosure, the ceramic-like material includes 40-60 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia, and 20-30 parts by weight of organic macromolecules Material.

According to some embodiments of the present disclosure, the ceramic-like material further includes 5-20 parts by weight of fibers, the fibers including at least one of glass fibers, carbon fibers, and mineral fibers.

According to some embodiments of the present disclosure, the fibers have a D50 diameter of 0.1-10 μm.

According to some embodiments of the present disclosure, the imitation ceramic material includes 30-50 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia, and 20-30 parts by weight of organic macromolecules material and 5-15 parts by weight of fiber.

According to some embodiments of the present disclosure, the organic polymer material includes at least one of polyphenylene sulfide, polyamide, polybutylene terephthalate, and polycarbonate.

According to some embodiments of the present disclosure, the density of the ceramic-like material is 2.4-2.9 g/cm ³ , the tensile strength is not less than 45 MPa, the bending strength is not less than 55 MPa, and the drop height is not less than 20 cm.

A second aspect of the present disclosure is to provide a method for preparing the above-mentioned imitation ceramic material. According to an embodiment of the present disclosure, the preparation method includes:

S1. Put aluminum oxide, silicon oxide, zirconium oxide and organic polymer materials into an extruder to extrude to obtain a feed;

S2, injecting the feed material in an injection molding machine to obtain a ceramic imitation material.

According to some embodiments of the present disclosure, before step S1, at least one of the alumina, silica and zirconia is surface-modified with a modifier, the modifier includes titanate, At least one of stearic acid, silane coupling agent, zirconate and aluminate.

According to some embodiments of the present disclosure, the D50 of the alumina is 0.3-1 μm, the D50 of the silicon oxide is 0.3-1 μm, and the D50 of the zirconia is 0.3-1 μm.

According to some embodiments of the present disclosure, the extrusion temperature of the extrusion is 290-335° C.; the injection molding temperature of the injection molding is 300-340° C., the injection pressure is 100-200 MPa, and the pressure holding time is 10-90 s.

According to some embodiments of the present disclosure, fibers are further added in step S1, and the fibers include at least one of glass fibers, carbon fibers, and mineral fibers.

A third aspect of the present disclosure is to provide an electronic product housing. According to an embodiment of the present disclosure, the electronic product housing is prepared by using the foregoing imitation ceramic material or the imitating ceramic material obtained by the foregoing method.

The present disclosure forms a close-packed structure by controlling the proportions of alumina, silica and zirconia to improve the strength of the ceramic material; and contains specific content of silica, alumina and zirconia to synergize with organic polymer materials , so that the imitation ceramic material has high strength, good impact resistance and ceramic texture, so that it can be used in electronic product casings to meet consumers' requirements for the appearance of electronic products.

Other features and advantages of the present disclosure will be described in detail in the detailed description that follows.

public detailed description

The endpoints of ranges and any values disclosed herein are not limited to the precise ranges or values, which are to be understood to encompass values proximate to those ranges or values. For ranges of values, the endpoints of each range, the endpoints of each range and the individual point values, and the individual point values can be combined with each other to yield one or more new ranges of values that Ranges should be considered as specifically disclosed herein.

In one aspect of the present disclosure, the present disclosure provides a ceramic-like material. According to an embodiment of the present disclosure, the imitation ceramic material includes 30-60 parts by weight of alumina, 5-20 parts by weight of silicon oxide, 5-20 parts by weight of zirconia, and 20-30 parts by weight of organic macromolecules Material.

In the present disclosure, the alumina, silica and zirconia have different morphologies, and by controlling the proportional relationship of the three within the scope of the present application, the alumina, silica and zirconia can form a close-packed structure , the strength of the imitation ceramic material is improved; and the alumina, silicon oxide, zirconia interact with the organic polymer material, so that the imitation ceramic material has the plastic toughness and the texture of the ceramic at the same time. The imitation ceramic material is easy to process, has high strength, has good impact resistance, and has good ceramic effect, so that it can be used in electronic product casings and can meet consumers' requirements for the appearance of electronic products. According to a specific embodiment of the present disclosure, the above-mentioned imitation ceramic material includes 40-60 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia and 20-30 parts by weight of organic macromolecules Material.

In an embodiment of the present disclosure, in order to further improve the mechanical properties of the ceramic-like material, the above-mentioned ceramic-like material may further include 5-20 parts by weight of fibers. According to a specific embodiment of the present disclosure, the above-mentioned imitation ceramic material includes 30-50 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia, and 20-30 parts by weight of organic macromolecules material and 5-15 parts by weight of fibers. According to yet another specific embodiment of the present disclosure, the above-mentioned fibers include at least one of glass fibers, carbon fibers, and mineral fibers. According to yet another specific embodiment of the present disclosure, the D50 diameter of the above-mentioned fibers is 0.1-10 μm. Thus, the mechanical properties of the ceramic-like material are further improved.

In yet another embodiment of the present disclosure, the above organic polymer material includes polyphenylene sulfide (PPS), polyamide (PA), polybutylene terephthalate (PBT) and polycarbonate (PC) one or more of. In order to further improve the mechanical properties of the material, reduce the melting temperature of the material, and thus reduce the difficulty of processing, according to a specific embodiment of the present disclosure, the above-mentioned organic polymer material may be a polyphenylene sulfide-based blend; The ether-based blend can be based on polyphenylene sulfide, mixed with one or more of polyamide, polybutylene terephthalate and polycarbonate polymer or alloys thereof.

The imitation ceramic material provided by the present disclosure has high strength and good impact resistance. According to an embodiment of the present disclosure, the tensile strength of the imitated ceramic material is not less than 45MPa, and the flexural strength is not less than 55MPa; The imitation ceramic material can withstand a 60g drop weight with a drop weight of not less than 20cm. The drop weight can be obtained by, but not limited to, a method of smashing the imitation ceramic material with a 60g drop weight at a preset drop weight height.

In yet another embodiment of the present disclosure, the density of the ceramic-like material provided by the present disclosure is 2.4-2.9 g/cm ³ , and thus, the ceramic-like material not only has the texture of ceramics, but also has Zirconium ceramics have the advantage of light weight.

In yet another aspect of the present disclosure, the present disclosure also provides a method for preparing the above-mentioned imitation ceramic material. According to an embodiment of the present disclosure, the preparation method includes:

S1, put 30-60 parts by weight of alumina, 5-20 parts by weight of silicon oxide, 5-20 parts by weight of zirconia and 20-30 parts by weight of organic polymer materials into an extruder and extrude to obtain feed material;

In the method for preparing the imitation ceramic material provided by the present disclosure, in the preparation process, by controlling the content of each component of the imitation ceramic material within the scope of the present application, the system has high melt index, good fluidity, and is easy to process and inject to obtain the imitation ceramic material. materials to improve product yields. According to a specific embodiment of the present disclosure, the melt index of the feed obtained in the above step S1 is greater than 10 g/10 min/290°C.

In an embodiment of the present disclosure, in the above step S1, 40-60 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia and 20-30 parts by weight of organic high The molecular material is put into the extruder and extruded to obtain the feed.

In yet another embodiment of the present disclosure, in order to further improve the mechanical properties of the imitation ceramic material, the above step S1 may further include adding 5-20 parts by weight of fibers. According to a specific embodiment of the present disclosure, in the above step S1, 30-50 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia, 20-30 parts by weight of organic The polymer material and 5-15 parts by weight of fibers are put into an extruder and extruded to obtain a feed. According to yet another specific embodiment of the present disclosure, the above-mentioned fibers include at least one of glass fibers, carbon fibers, and mineral fibers. According to yet another specific embodiment of the present disclosure, the D50 diameter of the above-mentioned fibers is 0.1-10 μm. Thus, the mechanical properties of the ceramic-like material are further improved.

In yet another embodiment of the present disclosure, in order to further improve the compatibility of the alumina, silica, zirconia and organic polymer materials, before step S1, the alumina, oxidative At least one of silicon and zirconia is subjected to surface modification treatment, and the modifier includes at least one of titanate, stearic acid, silane coupling agent, zirconate and aluminate. According to a specific embodiment of the present disclosure, the content of the above modifier accounts for 0.5-1.5 wt % of the total amount of the surface-modified substances; the surface-modified substances include the alumina, silicon oxide and oxide at least one of zirconium. According to yet another specific embodiment of the present disclosure, the surface-modified substances include the alumina, silica and zirconia.

In yet another embodiment of the present disclosure, in order to further improve the dispersibility of the alumina, silica and zirconia in the system, thereby improving the mechanical properties of the prepared ceramic-like material, the D50 of the alumina is 0.3- 1 μm, the D50 of the above-mentioned silicon oxide is 0.3-1 μm, and the D50 of the above-mentioned zirconia is 0.3-1 μm.

In yet another embodiment of the present disclosure, in order to improve the uniformity of the product, the raw materials are first mixed, and then put into an extruder to extrude to obtain a feed; the mixing time can be 0.5-3 hours, and the raw materials are mixed Evenly. According to a specific embodiment of the present disclosure, the extrusion temperature of the above extrusion is 290-335°C. The feeding material is injected in an injection molding machine, and the injection molding temperature is 300-340° C., the injection pressure is 100-200 MPa, and the pressure holding time is 10-90 s.

In yet another embodiment of the present disclosure, the above-mentioned organic polymer material includes at least one of polyphenylene sulfide, polyamide, polybutylene terephthalate, and polycarbonate. In order to further improve the mechanical properties of the material, reduce the melting temperature of the material, and thus reduce the difficulty of processing, the above-mentioned organic polymer material can be a polyphenylene sulfide-based blend; specifically, the polyphenylene sulfide-based blend can be polyphenylene sulfide. Sulfide is the main body, mixed with one or more of polyamide, polybutylene terephthalate and polycarbonate polymer or its alloy.

In a third aspect of the present disclosure, the present disclosure also provides an electronic product housing. According to an embodiment of the present disclosure, the electronic product housing includes the above-mentioned imitation ceramic material or the imitative ceramic material prepared by the above method. For example, the electronic product casing may be a mobile phone casing or a wearable device casing, specifically, a mobile phone casing, a mobile phone middle frame, an integrated mobile phone casing middle frame, a watch back cover or a watch middle frame, and the like. The imitation ceramic material of the present disclosure has the advantages of simple process preparation, easy processing and injection molding, no need for sintering, greatly reducing the manufacturing cost, and the obtained imitation ceramic material has high strength, good impact resistance, and good porcelain effect, and meets the requirements of Performance requirements for electronic product housings.

The present disclosure will be described below with reference to specific embodiments. It should be noted that these embodiments are merely illustrative and do not limit the present disclosure in any way.

Example 1

The method for preparing the imitation ceramic material of the present embodiment includes:

Weigh 4kg of alumina with a particle size of D50 of 0.5μm, 1kg of D50 of 0.8μm of silicon oxide, and 1kg of zirconia with a D50 of 0.3μm, then add 60g of γ-aminopropyltriethoxysilane to the mixer and stir for 1h After obtaining the modified ceramic composite powder;

Weigh 2.0kg of PPS plastic and add it to the mixer to mix for 1 hour to obtain the plastic-ceramic composite material. The screw extruder is heated to 300°C, and the plastic-ceramic composite material is extruded and pelletized by the screw extruder to obtain the feed;

Load the feeding material into the hopper of the injection molding machine, install the injection mold, set the barrel temperature of the injection molding machine to 320 ℃, the injection pressure to 120 MPa, the holding time of 30 s, and the mold temperature to 120 ℃ to obtain the imitation ceramic material S1 by injection molding. The component content of the imitation ceramic material S1 is: 50 parts by weight of alumina, 12.5 parts by weight of silicon oxide, 12.5 parts by weight of zirconia and 25 parts by weight of PPS plastic.

Example 2

Weigh 1.5kg of PPS plastic and 0.5kg of PBT plastic into the mixer and mix for 1 hour to obtain a plastic-ceramic composite material. The screw extruder is heated to 300 ° C, and the plastic-ceramic composite material is extruded and granulated by the screw extruder to obtain a plastic-ceramic composite. material;

Load the feeding material into the hopper of the injection molding machine, install the injection mold, set the temperature of the injection molding machine barrel to 320 °C, the injection pressure to 120 MPa, the holding time of 30 s, and the mold temperature to be 120 °C, and the imitation ceramic material S2 is obtained by injection molding. The component content of the imitation ceramic material S2 is: 50 parts by weight of alumina, 12.5 parts by weight of silicon oxide, 12.5 parts by weight of zirconia, 18.75 parts by weight of PPS and 6.25 parts by weight of PBT plastic polymer blend matrix.

Examples 3-8

Embodiments 3-8 respectively provide the preparation methods of the imitation ceramic materials. During the preparation process, the remaining steps are the same as those in Embodiment 1 except that the types or parts by weight of the raw materials used are different. The content of each component in the mixed raw materials in Examples 3-8 is shown in Table 1.

Comparative Example 1

The method for preparing the imitation ceramic material of this comparative example includes:

Weigh 6.0 kg of alumina with a medium particle size D50 of 0.5 μm, then add 60 g of γ-aminopropyltriethoxysilane to the mixer, and stir for 1 hour to obtain the modified ceramic composite powder;

Put the feed material into the hopper of the injection molding machine, install the injection mold, set the temperature of the injection molding machine barrel to 320°C, the injection pressure to 120MPa, the pressure holding time to 30s, and the mold temperature to be 120°C, and the imitation ceramic material D1 is obtained by injection molding. The component content of the imitation ceramic material D1 is: 75 parts by weight of alumina and 25 parts by weight of PPS plastic.

Comparative Example 2

The preparation method of the imitation ceramic material of this comparative example is:

Weigh 6.0 kg of zirconia with a medium particle size D50 of 0.3 μm, then add 60 g of γ-aminopropyltriethoxysilane to the mixer, and stir for 1 hour to obtain the modified ceramic composite powder;

Load the feeding material into the hopper of the injection molding machine, install the injection mold, set the barrel temperature of the injection molding machine to 320°C, the injection pressure to be 120MPa, the pressure holding time to 30s, and the mold temperature to be 120°C, and the imitation ceramic material D2 is obtained by injection molding. The component content of the imitation ceramic material D2 is: 75 parts by weight of zirconia and 25 parts by weight of PPS.

Comparative Example 3

Weigh 4kg of zirconia with a particle size of D50 of 0.3μm, 1kg of D50 of 0.8μm of silicon oxide, and 1kg of aluminum oxide with a D50 of 0.5μm, then add 60g of γ-aminopropyltriethoxysilane to the mixer and stir for 1h After obtaining the modified ceramic composite powder;

Load the feed material into the hopper of the injection molding machine, install the injection mold, set the barrel temperature of the injection molding machine to 320°C, the injection pressure to be 120MPa, the pressure holding time to 30s, and the mold temperature to be 120°C, and the imitation ceramic material D3 is obtained by injection molding. The component contents of the imitation ceramic material D3 are: 50 parts by weight of zirconia, 12.5 parts by weight of silicon oxide, 12.5 parts by weight of alumina and 25 parts by weight of PPS plastic.

Comparative Example 4

The preparation method of the preparation of the imitation ceramic material of this comparative example includes:

Weigh 5kg of alumina with a median particle size D50 of 0.5μm and 1kg of zirconia with a D50 of 0.3μm, then add 60g of γ-aminopropyltriethoxysilane to the mixer, and stir for 1h to obtain a modified ceramic composite powder;

Weigh 2.0kg of PPS plastic and add it to the mixer and mix for 1h to obtain the plastic-ceramic composite material, the screw extruder is heated to 300°C, and the plastic-ceramic composite material is extruded and pelletized through the screw extruder to obtain the feed;

Load the feeding material into the hopper of the injection molding machine, install the injection mold, set the barrel temperature of the injection molding machine to 320 ℃, the injection pressure to 120 MPa, the holding time of 30 s, and the mold temperature to 120 ℃ to obtain the imitation ceramic material S1 by injection molding. The component content of the imitation ceramic material S1 is: 62.5 parts by weight of alumina, 12.5 parts by weight of zirconia and 25 parts by weight of PPS plastic.

Comparative Example 5

Weigh 5kg of alumina with a median particle size D50 of 0.5μm and 1kg of D50 as 0.8μm silicon oxide, then add 60g of γ-aminopropyltriethoxysilane to the mixer, stir for 1h to obtain the modified ceramic composite powder body;

Load the feeding material into the hopper of the injection molding machine, install the injection mold, set the barrel temperature of the injection molding machine to 320 ℃, the injection pressure to 120 MPa, the holding time of 30 s, and the mold temperature to 120 ℃ to obtain the imitation ceramic material S1 by injection molding. The component content of the imitation ceramic material S1 is: 62.5 parts by weight of alumina, 12.5 parts by weight of silicon oxide and 25 parts by weight of PPS plastic.

Performance Testing:

(1) The raw material of imitating ceramic material is put into the extruder and extruded to obtain the feed, and the melt index of the feed is tested, and the test is carried out with reference to ASTM D1238-04, wherein the melting temperature is 290 ° C.

(2) Perform the following performance tests on the imitation ceramic materials:

Density/g/cm ³ : Test according to ISO 1183-1;

Tensile strength: test according to ASTM D638;

Flexural strength: tested according to ASTM D790;

Hardness: Vickers hardness, hardness tester and indentation method (diamond indenter, force 1kg, pressure test time 10s);

Drop weight test: Test according to ASTM E208, in which a 60g drop weight is used to hit the center of the sample, starting from a height of 5cm, and if it does not crack, increase the height by 5cm each time until the sample has visible cracks and stop, and record the height value;

Ceramic texture: percussion zirconia ceramics with stainless steel sheets, based on the sound of zirconia ceramics, percussion imitation ceramic materials with stainless steel, the sound of imitation ceramic materials is more than 80% close to that of zirconia ceramics , marked as A+ grade; every 10% is a gradient, more than 50% of the sound emitted by the imitation ceramic material is close to the sound emitted by the zirconia ceramic, which is marked as the B+ grade; among them, the sound emitted by the imitation ceramic material is closer to the sound emitted by the zirconia ceramic. The sound, the better the ceramic texture, the more ceramic-like in appearance.

Table 1 Mixed raw material components and parts by weight data table in the examples and comparative examples

Table 2

As can be seen from the data in Table 2, the imitation ceramic material provided by this application satisfies that the melt index is greater than 10g/10min/290°C, the density is 2.4-2.9g/cm ³ , the tensile strength is greater than or equal to 45MPa, and the flexural strength is greater than or equal to 55MPa, the height of the drop weight is greater than or equal to 20cm, and the comprehensive performance is excellent; among them, the raw material of the imitation ceramic material is put into the extruder and extruded to obtain a high melt index, and it is easy to be injection molded to form a ceramic imitation material; Good impact resistance; and good porcelain effect. Comparative example 1 and comparative example 5 have low melt index, which is difficult for injection molding and reduces production efficiency; comparative example 2-3 has low strength, poor impact resistance, and high density, which is not conducive to light weight; impact resistance of comparative example 4 Difference.

The preferred embodiments of the present disclosure are described above in detail, but the present disclosure is not limited to the specific details of the above-mentioned embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure. These simple modifications All belong to the protection scope of the present disclosure.

In addition, it should be noted that the various specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner unless they are inconsistent. In order to avoid unnecessary repetition, the present disclosure provides The combination method will not be specified otherwise.

In addition, the various embodiments of the present disclosure can also be arbitrarily combined, as long as they do not violate the spirit of the present disclosure, they should also be regarded as the contents disclosed in the present disclosure.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structures, materials, or features are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present disclosure have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limitations of the present disclosure, and those of ordinary skill in the art may interpret the above-described embodiments within the scope of the present disclosure. Embodiments are subject to variations, modifications, substitutions and variations.

Claims

An imitation ceramic material, comprising: 30-60 parts by weight of alumina, 5-20 parts by weight of silicon oxide, 5-20 parts by weight of zirconia and 20-30 parts by weight of organic polymer materials.
The imitation ceramic material according to claim 1, wherein the imitation ceramic material comprises 40-60 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia and 20-30 parts by weight of zirconia parts of organic polymer materials.
The imitation ceramic material according to claim 2, wherein the imitation ceramic material further comprises 5-20 parts by weight of fibers, the fibers comprising at least one of glass fibers, carbon fibers and mineral fibers.
The ceramic-like material according to claim 3, wherein the D50 diameter of the fibers is 0.1-10 μm.
The imitation ceramic material according to claim 3 or 4, wherein the imitation ceramic material comprises 30-50 parts by weight of alumina, 10-15 parts by weight of silicon oxide, 10-15 parts by weight of zirconia, 20-15 parts by weight of zirconia 30 parts by weight of organic polymer materials and 5-15 parts by weight of fibers.
The imitation ceramic material according to claim 1, wherein the organic polymer material comprises at least one of polyphenylene sulfide, polyamide, polybutylene terephthalate and polycarbonate.
The imitation ceramic material according to claim 1, wherein the density of the imitation ceramic material is 2.4-2.9g/cm 3 , the tensile strength is not less than 45MPa, the flexural strength is not less than 55MPa, and the drop height is not low at 20cm.
A method for preparing the imitation ceramic material described in any one of claims 1-7, wherein, comprising:

S1. Put aluminum oxide, silicon oxide, zirconium oxide and organic polymer materials into an extruder to extrude to obtain a feed;

S2, injecting the feed material in an injection molding machine to obtain a ceramic imitation material.
The method according to claim 8, wherein, before step S1, at least one of the alumina, silica and zirconia is surface-modified with a modifier, and the modifier includes titanium At least one of acid ester, stearic acid, silane coupling agent, zirconate and aluminate.
The method according to claim 8 or 9, wherein the D50 of the alumina is 0.3-1 m, the D50 of the silicon oxide is 0.3-1 m, and the D50 of the zirconia is 0.3-1 m.
The method according to any one of claims 8-10, wherein the extrusion temperature of the extrusion is 290-335°C; the injection molding temperature of the injection molding is 300-340°C, and the injection pressure is 100-200MPa, The holding time is 10-90s.
The method according to any one of claims 8-11, wherein step S1 further comprises adding fibers, the fibers comprising at least one of glass fibers, carbon fibers and mineral fibers.
An electronic product casing, wherein the electronic product casing adopts the imitation ceramic material according to any one of claims 1-7 or the imitation ceramic material obtained by the method according to any one of claims 8-12 prepared.