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Zirconia ceramic powder and preparation method thereof

A zirconia ceramic and zirconia technology, which is applied in the field of multi-stabilizer zirconia ceramic powder and its preparation, can solve the problem of difficulty in manufacturing dense sintering, and achieve suitable mass production, wide solid solution range, and improved stability. Effect

Inactive Publication Date: 2019-01-22
河源帝诺新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The three crystal forms can be transformed into each other. During the phase transition process of monoclinic and tetragonal crystal forms, there is a sudden change in volume. Therefore, it is difficult to produce densely sintered and crack-free products using pure zirconia.
[0005] Partially stabilized zirconia with a single stabilizer above has its own obvious advantages and disadvantages, and has certain limitations in actual grinding production

Method used

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  • Zirconia ceramic powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of zirconia ceramic powder, with yttrium nitrate hexahydrate Y (NO 3 ) 3 ·6H 2 O, 97mol of zirconium oxychloride octahydrate ZrOCl 2 ·8H 2 O was added to deionized water, and yttrium-stabilized zirconia Y-TZP powder was prepared by co-precipitation method. After forming, sintering, polishing and other processes, 1.5mm zirconia grinding balls are made. Wherein, the sintering temperature is 1500-1530°C.

[0029] Then test the physical properties of the zirconia balls as follows (abrasion test conditions: bedroom test sand mill 1L, continuous test for 7 days, test temperature 60°C):

[0030] Density; 6.06g / cm 3

[0031] Average compressive crushing strength: 700Mpa.

[0032] Abrasion: 80ppm.

Embodiment 2

[0034] A kind of preparation method of zirconia ceramic powder, with the magnesium nitrate Mg of 2mol (NO 3 ) 2 ·6H 2 O, 3mol of Y (NO 3 ) 3 ·6H 2 O, 95mol of ZrOCl 2· ·8H 2 O was added to deionized water, and Mg and Y co-stabilized zirconia Y-Mg-PSZ powder was prepared by co-precipitation method. After forming, sintering, polishing and other processes, 1.5mm zirconia grinding balls are made. Then test the physical properties of the zirconia balls as follows (abrasion test conditions: bedroom test sand mill 1L, continuous test for 7 days, test temperature 60°C):

[0035] The best sintering temperature: 1490-1530℃.

[0036] Density; 6.02g / cm 3

[0037] Average compressive crushing strength: 615Mpa.

[0038] Abrasion: 135ppm.

Embodiment 3

[0040] A kind of preparation method of zirconia ceramic powder, with 1mol of Mg (NO 3 ) 2 ·6H 2 O, 3mol of Y (NO 3 ) 3 ·6H 2 O, 96mol of ZrOCl 2· ·8H 2 O was added to deionized water, and the co-stabilized zirconia powder was prepared by co-precipitation method. After forming, sintering, polishing and other processes, 1.5mm zirconia grinding balls are made. Then test the physical properties of the zirconia balls as follows (abrasion test conditions: bedroom test sand mill 1L, continuous test for 7 days, test temperature 60°C):

[0041] The best sintering temperature: 1460-1500℃.

[0042] Density; 6.07g / cm 3

[0043] Average compressive crushing strength: 685Mpa.

[0044] Abrasion: 70ppm.

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Abstract

The invention discloses zirconia ceramic powder and a preparation method thereof. The zirconia ceramic powder is prepared from the following raw materials in parts by weight: 1-5 parts of Y(NO3)3.6H2O, 95-100 parts of ZrOCl2..8H2O and 0.5-4 parts of Mg(NO3)2.6H2O; the raw materials are separately added into deionized water to obtain a mixed solution, and the mixed solution is subjected to precipitation treatment by a coprecipitation method to obtain zirconia (Y-TZP) powder; the zirconium (Y-TZP) powder is subjected to molding, sintering and polishing to obtain a zirconia grinding ball with theparticle size of 1.5mm. The zirconia ceramic powder prepared by the method has the advantages of high compressive strength, stability, good toughness, resistance to high temperature and humid environment in use, low sintering temperature and simple process under the existing process conditions, and suitability for mass production.

Description

technical field [0001] The invention belongs to the technical field of ceramic powder processing, in particular to a multi-stabilizer zirconia ceramic powder and a preparation method thereof. Background technique [0002] Zirconia ceramics are the earliest researched phase-change toughened ceramics. Using the phase-change characteristics of zirconia, ceramic products with very high fracture toughness and bending strength can be obtained. In the modern industrial ceramic system, zirconia ceramics have become the second largest industrial ceramic system after alumina ceramics. Zirconia has three crystal forms: monoclinic, tetragonal, and cubic. The three crystal forms can be transformed into each other. During the phase transition process between monoclinic and tetragonal crystal forms, there is a sudden change in volume. Therefore, it is difficult to produce densely sintered products without cracking using pure zirconia. Early people found that adopting and Zr 4+ Cationic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/626
CPCC04B35/48C04B35/622C04B35/62605C04B2235/3206C04B2235/3225C04B2235/77C04B2235/96
Inventor 黄印刘泽勇戴立品
Owner 河源帝诺新材料有限公司
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