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Zirconia-based ceramic back plate, preparation method and application thereof

A technology of zirconia ceramics and ceramic backplanes, which can be used in sub-office equipment, telephone communications, electrical components, etc., and can solve problems such as low mechanical strength, high organic content, and low ceramic compactness

Active Publication Date: 2021-04-30
HUNAN KOSEN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic solvent used in the molding process of this method has certain toxicity, and the content of organic matter is high, and the strength of the backplane is low.
The above methods all have high organic matter content (both greater than 2%), and pores are inevitably generated during the volatilization process of organic matter, resulting in high porosity, resulting in low ceramic density and low mechanical strength.

Method used

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  • Zirconia-based ceramic back plate, preparation method and application thereof
  • Zirconia-based ceramic back plate, preparation method and application thereof

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Embodiment approach

[0080] According to a second embodiment of the present invention, a method for preparing a zirconia-based ceramic backplane or a method for preparing a zirconia-based ceramic backplane according to the first embodiment is provided.

[0081] A method for preparing a zirconia ceramic back plate, the method comprising the steps of:

[0082] 1) Weigh each raw material in proportion and stir to mix evenly. Then it is placed in an isostatic pressing mold cover to obtain an isostatic pressing green body.

[0083] 2) The isostatic pressed green body obtained in step 1) is placed in a sintering machine for pre-sintering treatment, and the pre-sintered green body is obtained after cooling.

[0084] 3) Slicing the calcined body obtained in step 2) to obtain thin slices.

[0085] 4) Sintering the flakes obtained in step 3) again, and finally obtaining a zirconia ceramic back plate after surface treatment.

[0086] As preferably, the proportioning of each component raw material addition...

Embodiment 1

[0106] 7.5kg of zirconia stabilized with magnesia-yttria composite stabilizer (8wt% magnesia+2wt% yttrium oxide+90% zirconia, the average particle size of zirconia is 15nm), 0.6kg lanthanum hexaboride (average particle size diameter of 15 μm), 0.1 kg of binder and 0.85 kg of titanium boride (average particle size of 10 μm) were put into the container, and then a saturated aqueous solution containing 1.8 kg of zirconium oxychloride (average particle size of 15 μm) and 4 kg of hydrogen peroxide were added And after stirring at room temperature for 24h, the mixture was obtained. The mixture was then dried at 110 °C for 1.5 h and ground to nanoscale. After the drying and grinding are completed, the isostatic pressing green body is obtained after pressing in the isostatic pressing mold sleeve under a pressure of 500 MPa and keeping the pressure for 15 minutes. Next, the isostatic pressed green body is heated to 1050° C. in a sintering machine at a rate of 15° C. / h for sintering an...

Embodiment 2

[0108] 6.5kg of zirconia stabilized with magnesia-yttria composite stabilizer (8wt% magnesia+2wt% yttrium oxide+90% zirconia, the average particle size of zirconia is 15nm), 0.8kg lanthanum hexaboride (average particle size diameter of 15 μm), 0.08 kg of binder and 0.8 kg of titanium boride (average particle size of 10 μm) were put into the container, and then a saturated aqueous solution containing 2.62 kg of zirconium oxychloride (average particle size of 15 μm) and 5 kg of hydrogen peroxide were added And after stirring at room temperature for 24h, the mixture was obtained. The mixture was then dried at 110 °C for 1.5 h and ground to nanoscale. After the drying and grinding are completed, the isostatic pressing green body is obtained after pressing in the isostatic pressing mold sleeve under a pressure of 500 MPa and keeping the pressure for 15 minutes. Next, the isostatic pressed green body is heated to 1050° C. in a sintering machine at a rate of 15° C. / h for sintering a...

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Abstract

The invention provides a zirconia-based ceramic back plate, a preparation method and application thereof. According to the invention, zirconia, zirconium oxychloride and lanthanum hexaboride are used as initial raw materials, a green body is obtained through uniform mixing, hydrolysis, drying and ultrahigh-pressure isostatic cool pressing pretreatment in the presence of a binder, and is free of organic volatilization, low in porosity and free of density gradient, and the blank is subjected to presintering, slicing and secondary sintering treatment to obtain a zirconia ceramic back plate, wherein the zirconia ceramic back plate obtained after the blank is sintered is good in sintering density, high in strength and high in wear resistance and has high toughness, strength and hardness and excellent wear resistance and heat stability.

Description

technical field [0001] The invention relates to a zirconia-based ceramic material and its preparation and application, in particular to a zirconia-based ceramic back plate and its preparation method and use, belonging to the technical field of back plate production for electronic products. Background technique [0002] With the rapid development of communication and digital technology, electronic products such as mobile phones have undergone several upgrades in just a few decades, becoming the epitome of technological progress. The mobile phone shell is not only a powerful protective umbrella for the mobile phone, but also ensures the reception and transmission of electromagnetic signals, reduces the damage caused by accidental drops, prolongs the service life of the mobile phone, and more importantly, improves the product experience of users. Therefore, the materials for making mobile phone shells are required to have the characteristics of no electromagnetic shielding, hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/645H04M1/18
CPCC04B35/48C04B35/622C04B35/645H04M1/185C04B2235/3804C04B2235/444C04B2235/3813C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96
Inventor 史伟卫义成欧阳光华刘立瑶
Owner HUNAN KOSEN NEW MATERIAL
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