Powder for high-strength zirconia sintered body and application of high-strength zirconia sintered body

A technology of zirconia and sintered body, applied in dental prosthesis, compression mold cup, dentistry, etc., can solve the problems of low strength of zirconia, poor overall texture and jade feeling, not beautiful enough, and achieve good jade feeling and excellent performance , the effect of strong denture texture

Inactive Publication Date: 2017-05-24
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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Problems solved by technology

[0003] CN104016677A discloses a light-transmitting zirconia sintered body and its preparation method. The dental zirconia prepared by thi

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  • Powder for high-strength zirconia sintered body and application of high-strength zirconia sintered body

Examples

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Comparison scheme
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Embodiment 1

[0023] This embodiment provides a method for preparing a high-strength zirconia sintered body, which includes the following steps:

[0024] (1) Mix and dissolve soluble zirconium salt and yttrium salt in water at a molar ratio of 97.5:2.5, adjust the pH value to 9 with ammonia water under stirring conditions, then hydrothermally synthesize at 170°C for 50 hours, and wash and dry the obtained reaction solution in turn Finally, heat treatment at 950°C, and then grind, and granulate the obtained powder to obtain zirconia powder; the molar percentage of yttrium oxide in the zirconia powder is 2.5%, and the BET specific surface area of ​​the zirconia powder is 12.8m 2 / g, the average particle size is 0.198μm;

[0025] (2) Disperse 100kg of zirconia powder in 80kg of water, add 0.4kg of acrylic acid and 2kg of polyethylene glycol, mix and spray granulate to obtain high-strength zirconia with a moisture content of 0.3wt% and an average particle size of 35 μm Powder for sintered bod...

Embodiment 2

[0028] This embodiment provides a method for preparing a high-strength zirconia sintered body, which includes the following steps:

[0029] (1) Mix and dissolve soluble zirconium salt and yttrium salt in water at a molar ratio of 97.2:2.8, adjust the pH value to 8.5 with ammonia water under stirring conditions, then hydrothermally synthesize at 160°C for 32 hours, and wash and dry the obtained reaction solution in turn Afterwards, heat treatment at 1100°C, and then grinding, and granulation of the obtained powder to obtain zirconia powder; the molar percentage of yttrium oxide in the zirconia powder is 2.8%, and the BET specific surface area of ​​the zirconia powder is 11.6m 2 / g, the average particle size is 0.192μm;

[0030] (2) Disperse 50kg of zirconia powder in 100kg of water, add 0.1kg of polyacrylic acid and 0.5kg of polyvinyl alcohol, mix well and spray granulate to obtain a high-strength zirconia with a moisture content of 0.15wt% and an average particle size of 38 μ...

Embodiment 3

[0033] This embodiment provides a method for preparing a high-strength zirconia sintered body, which includes the following steps:

[0034] (1) Mix and dissolve soluble zirconium salt and yttrium salt in water at a molar ratio of 97:3, adjust the pH value to 10 with ammonia water under stirring conditions, then hydrothermally synthesize at 140°C for 70 hours, and wash and dry the obtained reaction solution in turn Finally, heat treatment at 1000°C, then grinding, and granulating the obtained powder to obtain zirconia powder; the molar percentage of yttrium oxide in the zirconia powder is 3%, and the BET specific surface area of ​​the zirconia powder is 10.5m 2 / g, the average particle size is 0.201μm;

[0035] (2) Disperse 100kg of zirconia powder in 100kg of water, add 0.2kg of polyacrylic acid and 5kg of polyvinyl alcohol, mix and spray granulate to obtain high-strength zirconia with a moisture content of 0.45wt% and an average particle size of 42 μm Powder for sintered bo...

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Abstract

The invention relates to the field of ceramic materials, in particular to a high-strength zirconia sintered body and a preparation method and application of the high-strength zirconia sintered body. The preparation method comprises the following steps that (1) zirconium salt and yttrium salt are mixed and dissolved in water, the pH value is adjusted to 8 to 10, then hydrothermal synthesis is carried out, an obtained reaction solution is subjected to heat treatment after being washed and dried, the reaction solution subjected to heat treatment is then ground, and obtained powder particles are granulated to obtain zirconia powder; (2) the zirconia powder is mixed with water to obtain a mixture I, a dispersant and a binder are added to the mixture I to be uniformly mixed to obtain a mixture II, and the mixture II is granulated to obtain the powder for the high-strength zirconia sintered body; (3) isostatic pressing is carried out on the powder for the high-strength zirconia sintered body and the like to be prepared into a green body, and the green body is subjected to degreased biscuit firing for 1 to 4 h at the temperature of 900 to 1100 DEG C and then high-temperature sintering is conducted to obtain the powder for the high-strength zirconia sintered body. The high-strength zirconia sintered body prepared by the method disclosed by the invention has high strength, good light transmittance and excellent performances, and a denture prepared by using the sintered body is strong in texture, good in jade appearance and similar to a human tooth.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a powder for high-strength zirconia sintered body and its application. Background technique [0002] Zirconia ceramics is a new type of biological powder, with good biocompatibility and excellent mechanical properties, it has become the focus of dental ceramics development. [0003] CN104016677A discloses a light-transmitting zirconia sintered body and a preparation method thereof. The dental zirconia prepared by this method has low strength, poor overall texture and jade feeling, and is not beautiful enough, so its application has certain limitations. Contents of the invention [0004] In order to solve the above technical problems, the present invention provides a method for preparing a high-strength zirconia sintered body, which comprises the following steps: [0005] (1) Preparation of zirconia powder: mix and dissolve soluble zirconium salt and yttrium salt in water, adju...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622A61K6/02
CPCA61K6/818A61K6/822C04B35/48C04B35/622C04B2235/3225C04B2235/608C04B2235/656C04B2235/96C04B2235/9653
Inventor 杨爱民莫雪魁宋锡滨
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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