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Preparation method of high-toughness and high-strength black zirconia ceramic material

A technology of black zirconia and ceramic materials, applied in the field of zirconia ceramics, can solve the problem that cannot solve the problem of the uniformity of chemical composition of black pigment and nano-zirconia powder, the reduction of T+C phase content of black zirconia material, and the black chromaticity. Insufficient uniformity and stability, etc., to achieve the effects of good product consistency and stability, shortened mass transfer distance, and good aging resistance

Active Publication Date: 2021-03-16
长裕控股集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, black zirconia ceramics mostly use the mechanical mixing method, which directly carries out physical ball milling of black pigment and nano-zirconia powder, and then sinters at high temperature. The process is simple and easy for industrial production, but it cannot solve the problem of black pigment and nano-oxidation. The uniformity of the chemical composition of the zirconium powder may easily cause the black chroma of the product to be not uniform and stable, and the added black pigment may react with the yttrium oxide, resulting in a decrease in the T+C phase content of the black zirconia material, resulting in ceramic cracking
In addition, chromium oxide is generally used as raw material in the industry to prepare black zirconia ceramics, but chromium oxide is a toxic chemical substance that is likely to cause harm to the environment and human health

Method used

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  • Preparation method of high-toughness and high-strength black zirconia ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Mix zirconium oxychloride and yttrium trichloride solutions in a high-pressure reactor, the heating temperature is 140° C., the holding time is 4 hours, add citric acid solution to prepare a gel solution, add sodium hydroxide solution to neutralize, The pH value is controlled at 8. Wherein, the zirconium oxychloride solution is measured by the mass of solute zirconia, and the yttrium trichloride solution is measured by the mass of solute yttrium oxide. In the chemical composition, the mass ratio of (zirconia + hafnium oxide): yttrium oxide is 96.22:3.78. The added amount of the organic acid is based on the mass of the solute, which is 10% of the total mass of the two oxides of zirconia and yttrium oxide.

[0037] (2) Add the neutralized product to deionized water after dechlorination and sodium removal, add PEG2000 dispersant and stir, then add aluminum nitrate, lanthanum nitrate, zinc nitrate, titanium nitrate, cobalt nitrate, iron nitrate mixed solution, and fina...

Embodiment 2

[0049] (1) Mix zirconium oxychloride and yttrium trichloride solutions in a high-pressure reactor, the heating temperature is 140° C., the holding time is 4 hours, add citric acid solution to prepare a gel solution, add sodium hydroxide solution to neutralize, The pH is controlled at 11. Wherein, the zirconium oxychloride solution is measured by the mass of solute zirconia, and the yttrium trichloride solution is measured by the mass of solute yttrium oxide. In the chemical composition, the mass ratio of (zirconia + hafnium oxide): yttrium oxide is 96.22:3.78. The amount of the organic acid added is based on the mass of the solute, and is 10% of the total mass of the two oxides of zirconia and yttrium oxide.

[0050] (2) Add the neutralized product to deionized water after dechlorination and sodium removal, add PEG2000 dispersant and stir, then add aluminum nitrate, zinc nitrate, titanium nitrate, cobalt nitrate, iron nitrate mixed solution, and finally add ammonia water to a...

Embodiment 3

[0058] (1) Mix zirconium oxychloride and yttrium chloride solution in an autoclave, the heating temperature is 150° C., the holding time is 4 hours, add citric acid solution to prepare gel solution, add sodium hydroxide solution to neutralize, The pH value is controlled at 10. Wherein, the zirconium oxychloride solution is measured by the mass of solute zirconia, and the yttrium trichloride solution is measured by the mass of solute yttrium oxide. In the chemical composition, the mass ratio of (zirconia + hafnium oxide): yttrium oxide is 96.22:3.78. The amount of the organic acid added is based on the mass of the solute, and is 10% of the total mass of the two oxides of zirconia and yttrium oxide.

[0059] (2) Add the neutralized product to deionized water after dechlorination and sodium removal, add PEG2000 dispersant and stir, then add aluminum nitrate, lanthanum nitrate, and manganese nitrate mixed solution, and finally add ammonia water to adjust the pH value, and the pH ...

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Abstract

The invention relates to a preparation method of a high-toughness and high-strength black zirconia ceramic material, and belongs to the technical field of zirconia ceramics. According to the preparation method, a hydrolytic polymerization method and a microwave crystallization process are adopted to regulate and control the uniformity of powder components, the black zirconium oxide ceramic powderwith high sintering activity and uniform dispersion is provided, and then the black zirconium oxide ceramic powder is preformed; and high-temperature sintering is performed on the preformed ceramic blank to obtain the high-toughness high-strength black zirconia ceramic material. The product prepared by the invention does not contain toxic chromium element, has uniform chemical components, stable black chromaticity, high blackness, high toughness, high strength, good aging resistance and good product consistency and stability, and is suitable for being applied to various fields.

Description

technical field [0001] The invention relates to a method for preparing a high-toughness and high-strength black zirconia ceramic material, which belongs to the technical field of zirconia ceramics. Background technique [0002] Yttrium-stabilized zirconia ceramics are high-tech ceramics with high strength, high hardness, high toughness and excellent wear resistance, and are widely used in various industries, such as optical communications, oxygen sensors, medical ceramic plungers, shafts Sealed bearings, ceramic accessories for sand mills, ceramic molds, etc., can even be used in artificial joints. In recent years, with the continuous improvement of people's living standards, people's demand for decorations is also increasing. Black zirconia ceramics have a lower density than metals and excellent mechanical properties. The skin has no allergic side effects, and has attracted widespread attention. It has been used in emerging industries such as ceramic mobile phone backplane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/63C04B35/634
CPCC04B35/48C04B35/622C04B35/6303C04B35/63416C04B35/63404C04B35/63496C04B2235/3225C04B2235/3232C04B2235/3272C04B2235/3275C04B2235/3284C04B2235/3217C04B2235/3227C04B2235/602C04B2235/6562C04B2235/6567C04B2235/96
Inventor 高勇刘策王允强高笑姬忠军付珂
Owner 长裕控股集团股份有限公司
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