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Zirconia powder cake, preparation method and application, and adjustment method for its shrinkage performance

A technology of zirconia powder and zirconia, which can be used in applications, pharmaceutical formulations, dental preparations, etc., can solve problems such as cracking, deformation, and inconsistent shrinkage behavior of zirconia powder, and achieve avoidance of shape distortion, high deformation stability, and shrinkage Effects of Behavioral Controllable Modulation

Active Publication Date: 2021-11-30
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the shrinkage behavior of zirconia powders with different yttrium content is mostly inconsistent, causing problems such as deformation and cracking in the subsequent sintering process

Method used

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  • Zirconia powder cake, preparation method and application, and adjustment method for its shrinkage performance
  • Zirconia powder cake, preparation method and application, and adjustment method for its shrinkage performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Provide the preparation of multiple groups of zirconia powders (A1, A2, A3) with different yttrium content, the yttrium content of zirconia powder A1 is 3mol%, the yttrium content of zirconia powder A2 is 4mol%, and the yttrium content of zirconia powder A3 is 5mol% , the preparation method comprises the following steps:

[0072] (1) Preparation of zirconia powder A1 specifically includes the following steps: (1a) mixing zirconium nitrate and yttrium nitrate in a molar ratio of 97:6 and dissolving in water, adjusting the pH to 8-10; (1b) raising the temperature of the reaction system to 160 ℃ for hydrothermal synthesis; (1c) after the hydrothermal synthesis product is washed and dried, the powder is calcined and heat-treated at 950 ℃, ground, dispersed, and granulated to obtain zirconia powder A1 (yttrium content 3mol%);

[0073] (2) preparing zirconia powder A2, specifically comprising the following steps: (2a) calculating the hydrothermal synthesis temperature accordi...

Embodiment 2

[0095] Provide the preparation of multiple groups of zirconia powders (B1, B2, B3) with different yttrium content, the yttrium content of zirconia powder B1 is 5mol%, the yttrium content of zirconia powder B2 is 4mol%, and the yttrium content of zirconia powder B3 is 3mol% , the preparation method comprises the following steps:

[0096] (1) Preparation of zirconia powder B1 specifically includes the following steps: (1a) mixing zirconium nitrate and yttrium nitrate in a molar ratio of 95:10 and dissolving in water, adjusting the pH to 8-10; (1b) heating the reaction system to 160 ℃ for hydrothermal synthesis; (1c) after the hydrothermal synthesis product is washed and dried, the powder is calcined and heat-treated at 950 ℃, ground, dispersed, and granulated to obtain zirconia powder B1 (yttrium content 5mol%);

[0097] (2) preparing zirconia powder B2, specifically comprising the following steps: (2a) calculating the hydrothermal synthesis temperature according to formula (I):...

Embodiment 3

[0118] Provide the preparation of multiple groups of zirconia powders (C1, C2, C3) with different yttrium content, the yttrium content of zirconia powder C1 is 4mol%, the yttrium content of zirconia powder C2 is 6mol%, and the yttrium content of zirconia powder C3 is 2mol% , the preparation method comprises the following steps:

[0119](1) Preparation of zirconia powder C1 specifically includes the following steps: (1a) mixing zirconium nitrate and yttrium nitrate in a molar ratio of 96:8 and dissolving in water, adjusting the pH to 8-10; (1b) heating the reaction system to 160 ℃ for hydrothermal synthesis; (1c) after the hydrothermally synthesized product is washed and dried, the powder is calcined and heat-treated at 950°C, ground, dispersed, and granulated to obtain zirconia powder C1;

[0120] (2) preparing zirconia powder C2, specifically comprising the following steps: (2a) calculating the hydrothermal synthesis temperature according to formula (I): ΔT 水热合成 =-8.5×2=-17°...

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Abstract

The invention provides a zirconia powder cake, a preparation method and application, and a method for adjusting shrinkage performance thereof. The zirconia powder cake includes at least two zirconia powder layers, and the yttrium content of different zirconia powder layers is different, and the difference in TMA curve shrinkage initiation temperature of the different zirconia powder layers is ≤5°C; Different zirconia powder layers, TMA curve shrinkage deviation ≤ 0.3%. The present invention provides a zirconia powder cake, its preparation method and its use. The zirconia powder cake has different yttrium content in different zirconia powder layers, but still has substantially consistent shrinkage behavior, thus providing a solid foundation for the subsequent sintering process. High deformation stability can effectively avoid defects such as deformation and cracking caused by inconsistent shrinkage behavior.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and relates to a zirconia powder cake, a preparation method and its use, and a method for adjusting its shrinkage performance, in particular to a zirconia powder cake, its preparation method and use, and the preparation method of the zirconia powder cake The zirconia sintered body, its preparation method and application, and the denture prepared by using the zirconia powder cake or zirconia sintered body, its preparation method, and a method for adjusting the initial shrinkage temperature of the zirconia sintered body, and a A method for adjusting the shrinkage rate of a zirconia sintered body. Background technique [0002] Natural teeth have gradual light transmission, and layered zirconia dentures can make gradual light transmission dentures that are closer to natural teeth. Translucent gradient dentures with different Y 2 o 3 content achieved. However, due to the different components, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626C04B35/64A61K6/15A61K6/878A44C5/00A44C11/00
CPCC04B35/48C04B35/626C04B35/64A44C5/0084A44C11/00C04B2235/3225C04B2235/75C04B2235/656C04B2235/6567C04B2235/96C04B2235/9607C04B2235/9646A61K6/878
Inventor 宋锡滨杨爱民张巧云
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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