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Zirconium oxide ceramic material and preparation method and application thereof

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 small crystal size

Active Publication Date: 2021-05-28
中新棠国业(江苏)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Zirconium oxide ceramic material and preparation method and application thereof
  • Zirconium oxide ceramic material and preparation method and application thereof
  • Zirconium oxide ceramic material and preparation method and application thereof

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preparation example Construction

[0032] The invention provides a method for preparing 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 liquid;

[0034] molding the homogeneous mixture to obtain a zirconia ceramic body;

[0035] performing pre-sintering and final sintering on the zirconia ceramic body in sequence to obtain the zirconia ceramic material;

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

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

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

[0039] In the invention, after mixing zirconium oxide, oxide stabilizer, organic dispersant, polymer stabilizer and water, homogenization treatment is carried out to obtain homogeneous mixed liquid.

[0040] In the present invention, the average pa...

Embodiment 1

[0064] Add 1.76g of ammonium citrate, 14.5g of acrylamide and 0.5g of polyacrylamide to 106g of deionized water for the first mixing to obtain the first mixed solution; mix 220g of zirconia and 12g of Y 2 o 3 Carry out the second mixing to obtain mixed solids; the first mixed solution and mixed solids are mixed for the third time to obtain the second mixed solution; the second mixed solution is homogenized in a planetary ball mill, and the speed of ball milling is 200r / min, the time is 30min to obtain a homogeneous mixture;

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

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

[0067] Calcining the zirconia ceramic green body at 1000°C for 120 hours under normal pressure to obtain a calcined green body;

[0068] Calcining the pre-fired green body at 1400°C for 2 hours under normal pressure, grinding and polishing afte...

Embodiment 2

[0073] Add 0.62g ammonium polyacrylate and 2.2g sodium alginate to 106g deionized water, carry out first mixing, obtain the first mixed solution; Mix 220g zirconia and 12gY 2 o 3 Carry out the second mixing to obtain mixed solids; the first mixed solution and mixed solids are mixed for the third time to obtain the second mixed solution; the second mixed solution is homogenized in a planetary ball mill, and the speed of ball milling is 200r / min, the time is 30min to obtain a homogeneous mixture;

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

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

[0076] Calcining the zirconia ceramic green body at 1000°C for 120 hours under normal pressure to obtain a calcined green body;

[0077] Calcining the pre-fired green body at 1400°C for 2 hours under normal pressure, gr...

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Abstract

The invention relates to the technical field of ceramic materials, in particular to a zirconium oxide ceramic material and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps of mixing zirconium oxide, an oxide stabilizer, an organic dispersant, a polymer stabilizer and water, and homogenizing to obtain a homogeneous mixed solution, pre-sintering the homogeneous mixed solution to obtain a pre-sintered green body, and finally sintering the pre-sintered green body to obtain the zirconium oxide ceramic material, wherein the pre-sintering temperature ranges from 600 DEG C to 1000 DEG C; and the temperature of the final sintering is 1200 to 1400 DEG C. The zirconium oxide ceramic material prepared by the preparation method has high volume percentage content of tetragonal phase zirconium oxide and stably exists in the presence of water vapor; and the tetragonal zirconium oxide is small in grain size and high in bending strength.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a zirconia ceramic material and its preparation method and application. 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, there are three crystal forms of zirconia, which are monoclinic phase (m) which is stable at low temperature, tetragonal phase (t) which is metastable and cubic phase (c) which is stable at high temperature. Among them, the transformation of t→m not only has 3-4% volume effect and shear stress,...

Claims

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Application Information

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Patent Type & Authority Applications(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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