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Nano tetragonal phase zirconium oxide powder and preparation thereof

A technology of phase zirconia and powder, which is applied in the field of ceramic material powder and preparation, to achieve good lubricity and good dispersion performance

Inactive Publication Date: 2005-11-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The currently used zirconia surface modification method has not solved the problem of agglomeration and growth of nano-Y-TZP ceramic powder during the sintering process, and solving this problem is the key technology for preparing nano-ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Method 1: Weigh polyvinyl alcohol and nano-Y-TZP ceramic powder in a ratio of 1:5; heat polyvinyl alcohol to 1.5% in deionized water to 80°C to dissolve; add nano-Y-TZP ceramic powder Into the prepared solution, ultrasonically disperse for 30 minutes; use a magnetic heating stirrer to make it fully mixed, heat, stir, and dry to obtain a powder coated with polyvinyl alcohol; put the powder into a vacuum sintering furnace, at 400 ℃ for 3 hours to carry out polyvinyl alcohol dehydration treatment.

[0035] Method 2: Weigh polyvinyl alcohol and nano-Y-TZP ceramic powder in a ratio of 1:5; heat polyvinyl alcohol to 85°C in deionized water at a ratio of 2%; add nano-Y-TZP ceramic powder Into the prepared solution, ultrasonically disperse for 45 minutes; use a magnetic heating stirrer to make it fully mixed, heat, stir, and dry to obtain a powder coated with polyvinyl alcohol on the surface; put the powder into a vacuum sintering furnace, at 500 ℃ for 1.5 hours to carry out p...

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PUM

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Abstract

A nanometre-class square-phase zirconium oxide powder is prepared through wrapping the Y-TZP ceramic nano-powder by organic substance, dewatering to obtain carbon-wrapped powder, and sintering to obtain the said powder. It has 50-80 nm of granularity, more than 97% of relative density, and better dispersity. Its surficial carbon film has good lubricating performance.

Description

Technical field: [0001] The invention relates to a nano-tetragonal zirconia powder and its preparation, which belong to the field of materials, and specifically relate to a ceramic material powder and a technical solution for its preparation. technical background [0002] Zirconia-based ceramic materials have excellent properties such as high hardness, high strength, wear resistance, high temperature resistance and electrical insulation, and are widely used in structure and function. The four main areas of zirconia application are engineering ceramics, zirconia electrolytes, thermal barrier coatings, and advanced refractories. The room temperature strength and fracture toughness of nano tetragonal zirconia ceramics (nano Y-TZP ceramics) stabilized with yttrium oxide rank first among ceramics. Due to the large surface energy of nanoparticles, the crystal grains grow rapidly, even under the conditions of rapid sintering or very low temperature, it is easy to grow to more than...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 贾虎生张晓芸刘旭光许并社
Owner TAIYUAN UNIV OF TECH