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Zirconium-oxide ceramic, mobile phone backboard, preparing method of zirconia ceramic and preparing method of mobile phone backboard

A technology of zirconia ceramics and zirconia, which is applied in the field of ceramic materials and can solve problems such as poor wear resistance, poor wear resistance, and singleness

Active Publication Date: 2017-08-11
DONGGUAN HUAJING POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Zirconia powder itself is a white powder, and the ceramics prepared by it are naturally white. Common black zirconia ceramics are mainly prepared by blackening black materials or vacuum furnaces. Other colored zirconia ceramics are prepared by adding praseodymium oxide to the raw materials. , erbium oxide, cobalt oxide and other rare earth coloring agents; in addition, there is also a leopard pattern obtained by mixing the colored zirconia powder and white zirconia powder in a certain proportion after being molded. However, the above method can only obtain zirconia ceramics with the same overall color or the same overall effect, but cannot make numbers, characters, graphics, etc. on zirconia ceramics, which is very simple
[0004] For this reason, some merchants refer to the method of glazing wall and floor tiles. By making glaze, spraying, printing, etc. are used to glaze on the zirconia ceramic body, and then sintered integrally to form a layer of glaze on the zirconia ceramic layer. However, the glaze layer is usually sintered by inorganic pigments and glass powder, which has poor wear resistance and directly affects the wear resistance of the product, making the wear resistance of the product poor

Method used

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  • Zirconium-oxide ceramic, mobile phone backboard, preparing method of zirconia ceramic and preparing method of mobile phone backboard
  • Zirconium-oxide ceramic, mobile phone backboard, preparing method of zirconia ceramic and preparing method of mobile phone backboard
  • Zirconium-oxide ceramic, mobile phone backboard, preparing method of zirconia ceramic and preparing method of mobile phone backboard

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preparation example Construction

[0029] Such as figure 1 Shown, the preparation method of the mobile phone back plate of an embodiment, comprises the following steps:

[0030] Step S10: preparing zirconia ceramics.

[0031] Please also refer to figure 2 , wherein, the preparation method of zirconia ceramics comprises the following steps:

[0032] Step S110: molding the mixture to obtain a colored ceramic green body.

[0033] Wherein, the mixture includes zirconium oxide and inorganic colorant in a mass ratio of 80-90:10-20. The mixture of zirconia and inorganic colorants in this mass ratio can ensure the molding of the colored ceramic body and have sufficient strength; and zirconia is used as the ceramic powder in the mixture, so that during sintering, the colored ceramic body and zirconia There will be no reaction between the ceramic bodies, but other ceramic powders will react with the zirconia ceramic bodies to form eutectic compounds, which will affect the strength and appearance of the sintered zirc...

Embodiment 1

[0067] The preparation process of the mobile phone backboard of the present embodiment is as follows:

[0068] (1) Add zirconia, inorganic colorant, sintering aid and water into a ball mill tank and mix them for 5 hours on a planetary ball mill. The speed of ball milling is 250 rpm to obtain a slurry. The mass ratio of the additive is 85:15, and the inorganic colorant is cobalt oxide; the mass ratio of the sintering aid to zirconia is 0.9:190, and the sintering aid is composed of alumina, lithium carbonate and boron oxide, and alumina, lithium carbonate And the mass ratio of boron oxide is 7:1.5:1.5, the mass ratio of the sum of the mass of zirconia, inorganic colorant and sintering aid to the ball milling medium is 1:2, the mass ratio of zirconia, inorganic colorant and sintering aid The mass ratio of the sum to water is 1:0.6; then the slurry is filtered through a 30-mesh sieve, and placed on a stainless steel plate to dry at 190°C for 2.5 hours, and then add polyvinyl alcoh...

Embodiment 2

[0077] The preparation process of the mobile phone backboard of the present embodiment is as follows:

[0078](1) Add zirconia, inorganic colorant, sintering aid and water into a ball mill tank and mix them for 4 hours on a planetary ball mill at a speed of 200 rpm to obtain a slurry, wherein zirconia and inorganic coloring The mass ratio of agent is 80:20, and inorganic colorant is tin oxide, calcium carbonate, dichromium oxide and erbium oxide, and the mass ratio of tin oxide, calcium carbonate, dichromium oxide and erbium oxide is 5:0.6:0.2: 0.4; the mass ratio of sintering aid to zirconia is 0.8:180, the sintering aid is composed of alumina, lithium carbonate and boron oxide, and the mass ratio of alumina, lithium carbonate and boron oxide is 8:1:1, and the mass ratio of sintering aid is 8:1:1. The sum of the mass of zirconium, inorganic colorant and sintering aid is 1:1.5 with the mass ratio of ball milling medium, and the mass ratio of zirconia, inorganic colorant and si...

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Abstract

The invention relates to a zirconium-oxide ceramic, a mobile phone backboard, a preparing method of the zirconium-oxide ceramic and a preparing method of the mobile phone backboard. The preparing method of the zirconium-oxide ceramic includes the following steps that mixed materials are formed, and a colored ceramic blank is obtained, wherein the mixed materials comprise zirconium oxide and an inorganic coloring agent, and the mass ratio of the zirconium oxide to the inorganic coloring agent is (80-90):(10-20); a zirconium-oxide ceramic blank is provided, the colored ceramic blank and the zirconium-oxide ceramic blank are stacked, the product is sintered under the condition that the temperature is higher than or equal to the temperature when the inorganic coloring agent is started to be subjected to atomic diffusion so that the inorganic coloring agent in the colored ceramic blank can be diffused to enter the zirconium-oxide ceramic blank, and the zirconium-oxide ceramic is obtained. By means of the preparing method of the zirconium-oxide ceramic, figures, characters, graphs and the like can be made on the zirconium-oxide ceramic, and the obtained zirconium-oxide ceramic also has the good wear-resistant performance.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a zirconia ceramic, a mobile phone back plate and a preparation method thereof. Background technique [0002] Zirconia ceramics are a new type of ceramic material with many excellent properties such as wear resistance, corrosion resistance, high strength, high toughness, and good thermal stability. Compared with metals and plastics, zirconia ceramics have the characteristics of high Mohs hardness, high dielectric constant, no signal shielding and good biocompatibility, and have broad application prospects in smartphones and wearable devices, which makes zirconia Zirconium ceramics start from fingerprint identification cover and mobile phone back cover, and will gradually cut into the mobile terminal industry chain, becoming the third largest mobile phone back panel material after plastic and metal. [0003] Zirconia powder itself is a white powder, and the ceramics prepared by i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622H04M1/02
Inventor 张宁谢庆丰彭毅萍
Owner DONGGUAN HUAJING POWDER METALLURGY
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