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Mobile phone rear cover material and preparation method thereof

A technology for mobile phone back cover and raw material, applied in the field of mobile phone back cover material and its preparation, can solve the problems of surface density, poor oxidation resistance and yield strength, etc.

Inactive Publication Date: 2020-10-30
HANGZHOU XINKANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor surface density, oxidation resistance and yield strength of existing mobile phone back cover materials, and provide a composite oxidation of nano-graphite particles doped with potassium niobate with high density, oxidation resistance and high yield strength. Zirconium ceramic mobile phone back cover material and preparation method thereof

Method used

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  • Mobile phone rear cover material and preparation method thereof
  • Mobile phone rear cover material and preparation method thereof
  • Mobile phone rear cover material and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0029] 1) Lower the temperature of the stirrer to 150°C, add the potassium niobate raw material that has been soaked in dedecyl diammonium, accounting for 15% of the total weight of the mobile phone back cover material, and accounting for 15% of the total weight of the mobile phone back cover material. Add bismuth oxide with a content of 2%, and continue stirring for 6h.

[0030] 2) The product of step 1) was heated to 750° C. in a resistance furnace and stirred mechanically. 3% by weight of granular graphite was added. The stirrer performs mechanical agitation to form a fine vortex during the zirconia overlay. The stirrer was rotated at 250 rpm for 8 minutes. Graphite was added in three equal portions every 20 minutes.

[0031] 3) in step 2), add degassing agent hexachloroethane (C 2 Cl 6 )2kg, to remove all unwanted absorbed gas in the molten metal

[0032] 4) Add binder to the product of step 5), stir, pour into a cast iron preheated permanent mold with a size of 200 ...

Embodiment 2

[0034] 1) Lower the temperature of the agitator to 150°C, add potassium niobate, 65-80% of zirconia, The total weight percentage of the mobile phone back cover material is 2% bismuth oxide, and the stirring is continued for 6 hours.

[0035] 2) The product of step 1) was heated to 750° C. in a resistance furnace and stirred mechanically. 3% by weight of granular graphite was added. The stirrer performs mechanical agitation to form a fine vortex during the zirconia overlay. The stirrer was rotated at 250 rpm for 8 minutes. Graphite was added in three equal portions every 20 minutes.

[0036] 3) in step 2), add degassing agent hexachloroethane (C 2 Cl 6 )2kg, to remove all unwanted absorbed gas in the molten metal

[0037] 4) Add binder to the product of step 5), stir, pour into a cast iron preheated permanent mold with a size of 200 mm in length and 25 mm in diameter, sinter at high temperature, and perform a hardness test.

[0038] 5) Use a spherical indenter with a diame...

Embodiment 3

[0040] 1) Lower the temperature of the agitator to 150°C, add potassium niobate, 80% zirconia, and The total weight percentage of the cover material is 2% bismuth oxide, and the stirring is continued for 6 hours.

[0041] 2) The product of step 1) was heated to 750° C. in a resistance furnace and mechanically stirred to add 3% by weight of granular graphite. The stirrer performs mechanical agitation to form a fine vortex during the covering process of potassium niobate composite zirconia. The stirrer was rotated at 250 rpm for 8 minutes. Graphite was added in three equal portions every 20 minutes.

[0042] 3) in step 2), add degassing agent hexachloroethane (C 2 Cl 6 )2kg, to remove all unwanted absorbed gas in the molten metal

[0043] 4) Add binder to the product of step 5), stir, pour into a cast iron preheated permanent mold with a size of 200 mm in length and 25 mm in diameter, and sinter at high temperature.

[0044] 5) Using a tensile test pump, perform a tensile ...

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Abstract

The invention relates to a mobile phone rear cover material and a preparation method thereof. The mobile phone rear cover material is formed by compounding graphite micro-particles, potassium niobateand zirconium oxide, wherein the graphite microparticles can be uniformly dispersed in the potassium niobate composite zirconium oxide ceramic mobile phone rear cover material through a melting method, the KNbO3 synthesis raw materials are K2CO3 and Nb2O5, and bismuth oxide is added in the calcination process of the KNbO3 synthesis raw materials and a zirconium oxide raw material. The KNbO3 synthetic raw material and the zirconium oxide raw material are subjected to composite calcination, so that a uniform fine-grain structure is shown, and meanwhile, the KNbO3 synthetic raw material also hasthe characteristics of very high Curie temperature (about 420 DEG C), high frequency constant and the like. Due to no lead, the pollution to the environment can be reduced, and the volatilization of potassium and sodium in the sintering process can be avoided or reduced through hot-pressing sintering, so that a compact product is obtained. The preparation method disclosed by the invention is simple and convenient to operate and has an extremely wide application prospect.

Description

technical field [0001] The invention belongs to the field of oxide ceramic materials, and in particular relates to a mobile phone back cover material with high surface density, strong oxidation resistance and high yield strength and a preparation method thereof. Background technique [0002] The massive MIMO technology adopted by 5G needs to add a special antenna to the mobile phone, and metal will shield and interfere with the signal, so the demetallization of the back cover of the mobile phone will be the general trend. At present, the material of the back cover of the mobile phone is changing from metal to glass and ceramics And plastic, among which plastic is one of the most popular materials, but ordinary injection + sprayed back cover and protective cover cannot meet the requirements of the 5G era. The future trend is to approach metal or glass in terms of texture and experience. . The current IMT and back cover PC injection molding + coating plastic shells have made ...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
CPCC04B35/48C04B35/622C04B2235/3255C04B2235/3298C04B2235/425C04B2235/6022
Inventor 钟日城
Owner HANGZHOU XINKANG NEW MATERIAL CO LTD
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