Method for preparing zirconia ceramic product

A technology of zirconia ceramics and zirconia, which is applied in the field of preparation of zirconia ceramic products, can solve problems such as complex procedures, performance fluctuations, and high costs, and achieve the effects of simple process flow, high quality stability, and low production costs

Inactive Publication Date: 2013-03-20
LUOYANG BEIYUAN SPECIAL CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of this method are: 1) The process is complicated, the process is cumbersome, and it is easy to be mixed; 2) Two high-temperature treatments consume a lot of energy and cost; 3) Sintering is difficult, and the sintering temperature is above 1750°C
Its disadvantages are: 1) The requirements for controlling the conditions of the powder preparation process are relatively high, and performance fluctuations are prone to occur; 2) The production efficiency is low and the manufacturing cost is high; 3) The sintered product has a large volume shrinkage, and it is difficult to make large-scale products

Method used

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Embodiment Construction

[0028] Below in conjunction with embodiment this patent is further explained and illustrated. But the scope of protection of this patent is not limited to the specific implementation.

[0029] 1) Raw materials

[0030] Monoclinic Zirconia - ZrO 2 Content ≥ 99% (mass)

[0031] Yttrium oxide - Y 2 o 3 Content ≥ 99.9% (mass)

[0032] Magnesium oxide - MgO content ≥ 97%

[0033] 2) Ingredients

[0034] Formula ingredients according to the table: % (mass)

[0035] raw material name Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Monoclinic ZrO 2 84 86 90 92 95 97 Y 2 o 3 14 13 8 5 2 0 MgO 0 1 2 3 3 3

[0036] 3) Grind finely

[0037] Put the prepared raw materials together into a ball mill, mix and grind until the particle size is less than or equal to 20 microns.

[0038] 4) Molding

[0039] Isostatic pressing can be used: put the finely ground raw material into a rubber mold, and then put the mol...

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Abstract

The present invention provides a method for preparing zirconia ceramic products. The raw material includes 84-97% of monoclinic zirconia, 0-15% of yttrium oxide, and 0-3% of magnesium oxide. The raw material is pulverized to a particle size of no more than 20 microns. Isostatic pressing or hot die casting is used. The isostatic pressing green body or hot die casting green body after de-waxing is cleaned, and loaded into a high-temperature furnace for calcination, wherein the calcination temperature is 1600-1700 DEG C, and the temperature is kept for 3-6 h to obtain the product. The present invention uses the simplest process to obtain indicators surpassing that of the zirconia products produced by conventional processes. The pre-high-temperature stabilization is not needed, therefore the energy can be saved by about 50%. The chemical composition of the products and crystalline phase composition are highly consistent. The quality stability of the products is high. Other impurities will not be brought during the preparation process. The production cost is low, is 50% of conventional craft products, and 30% of novel fine ceramic products.

Description

technical field [0001] The invention relates to a technology of zirconia ceramic products, in particular to a preparation method of zirconia ceramic products. Background technique [0002] It is well known that zirconia has three crystal phases: monoclinic, tetragonal and cubic. In the process of preparing and using zirconia ceramics, the change of temperature will cause the change of zirconia crystal phase, the change of crystal phase will cause the change of density and volume, and these changes of density and volume will lead to the destruction of zirconia products. Therefore, when preparing zirconia products, oxides whose crystal phase is cubic (such as calcium oxide, magnesium oxide, yttrium oxide, cerium oxide, etc.) Zirconium or cubic zirconia. [0003] The preparation method of traditional zirconia ceramic products is: 1) mixing and grinding monoclinic zirconia raw materials and stabilizers; 2) calcining or melting at high temperature to make stable zirconia; 3) br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/48
Inventor 雷复兴孙学义张拯
Owner LUOYANG BEIYUAN SPECIAL CERAMICS
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