A kind of zirconia ceramic material and its preparation method and application

A technology of zirconia ceramics and zirconia, which is applied in the field of ceramic materials, can solve the problems of reduced bending strength of materials, and achieve the effects of small reduction in bending strength, low temperature, and increased volume content

Active Publication Date: 2022-08-02
中新棠国业(江苏)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the grain size of zirconia ceramic materials in the prior art is basically above 500nm. According to the Hall-Petch relationship, the increase in grain size will lead to a decrease in the bending strength of the material

Method used

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  • A kind of zirconia ceramic material and its preparation method and application
  • A kind of zirconia ceramic material and its preparation method and application
  • A kind of zirconia ceramic material and its preparation method and application

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preparation example Construction

[0032] The invention provides a preparation method of a zirconia ceramic material, comprising the following steps:

[0033] After mixing zirconia, metal oxide stabilizer, organic dispersant, polymer stabilizer and water, perform homogenization treatment to obtain a homogeneous mixed solution;

[0034] The homogeneous mixture is shaped to obtain a zirconia ceramic body;

[0035] The zirconia ceramic body is sequentially pre-sintered and final sintered to obtain the zirconia ceramic material;

[0036] The temperature of the pre-sintering is 600-1000°C;

[0037] The temperature of the final sintering is 1200-1400°C.

[0038] In the present invention, unless otherwise specified, the raw materials used are all commercially available products.

[0039] In the present invention, after mixing zirconia, oxide stabilizer, organic dispersant, polymer stabilizer and water, homogenization treatment is performed to obtain a homogeneous mixed solution.

[0040] In the present invention, ...

Embodiment 1

[0064] 1.76g of ammonium citrate, 14.5g of acrylamide and 0.5g of polyacrylamide were added to 106g of deionized water for first mixing to obtain a first mixed solution; 220g of zirconia and 12g of Y 2 O 3 Carry out the second mixing to obtain the mixed solid; carry out the third mixing of the first mixed solution and the mixed solid to obtain the second mixed solution; carry out the homogenization treatment of the second mixed solution in a planetary ball mill, and the ball milling speed is 200r / min, the time is 30min to obtain a homogeneous mixed solution;

[0065] The homogeneous mixed solution is obtained by grouting to obtain a wet blank, demoulded, and naturally air-dried to obtain a green blank;

[0066] Cutting the green body to obtain a zirconia ceramic body;

[0067] The zirconia ceramic body was calcined at 1000°C under normal pressure for 120h to obtain a pre-sintered body;

[0068] The pre-sintered green body is calcined at 1400 ℃ for 2 hours under normal pres...

Embodiment 2

[0073] Add 0.62g of ammonium polyacrylate and 2.2g of sodium alginate to 106g of deionized water, and perform first mixing to obtain a first mixed solution; 220g of zirconia and 12g of Y 2 O 3 Carry out the second mixing to obtain the mixed solid; carry out the third mixing of the first mixed solution and the mixed solid to obtain the second mixed solution; carry out the homogenization treatment of the second mixed solution in a planetary ball mill, and the ball milling speed is 200r / min, the time is 30min to obtain a homogeneous mixed solution;

[0074] The homogeneous mixed solution is formed by grouting to obtain a wet blank, the wet blank has a certain mechanical strength and then demoulded, and naturally air-dried to obtain a green blank;

[0075] Cutting the green body to obtain a zirconia ceramic body;

[0076] The zirconia ceramic body was calcined at 1000°C under normal pressure for 120h to obtain a pre-sintered body;

[0077] The pre-sintered green body is calcin...

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Abstract

The invention relates to the technical field of ceramic materials, in particular to a zirconia ceramic material and a preparation method and application thereof. The preparation method provided by the present invention includes the following steps: after mixing zirconia, oxide stabilizer, organic dispersant, polymer stabilizer and water, performing homogenization treatment to obtain a homogeneous mixed solution; Pre-sintering is performed to obtain a pre-sintered body; final sintering is performed on the pre-sintered body to obtain the zirconia ceramic material; the temperature of the pre-sintering is 600-1000°C; the temperature of the final sintering is 1200- 1400℃. The zirconia ceramic material prepared by the preparation method has a high volume percentage of tetragonal zirconia and can exist stably in the presence of water vapor; and the tetragonal zirconia has small grain size and high bending strength.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a zirconia ceramic material and a preparation method and application thereof. Background technique [0002] As one of the most important ceramic materials, zirconia is used in bearings, wear-resistant materials, thermal barrier coatings (TBC) and biomedical fields. Compared with metal and polymer materials in the field of medical materials, zirconia ceramic materials are widely used in the preparation of dental teeth due to their excellent mechanical properties, chemical stability and biocompatibility, especially their excellent aesthetic effects. Crown Restoration. [0003] However, due to the existence of three crystal forms of zirconia, the low temperature stable monoclinic phase (m), the metastable tetragonal phase (t) and the high temperature stable cubic phase (c) are respectively. Among them, the transformation of t→m has not only 3-4% volume effect and shear s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/632C04B35/634C04B35/636
CPCC04B35/48C04B35/622C04B35/632C04B35/63444C04B35/63404C04B35/63424C04B35/636
Inventor 梁新杰
Owner 中新棠国业(江苏)科技有限公司
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