Dispersion method of single crystal sapphire fiber in aluminum oxide ceramic composite material and composite material

A single crystal sapphire, alumina ceramic technology, applied in the field of composite materials, can solve the problems of reducing wear resistance, high temperature oxidation resistance, whisker fracture, etc. of composite materials, so as to reduce sintering temperature, increase tolerance and protect integrity Effect

Active Publication Date: 2015-06-03
TSINGHUA INNOVATION CENT IN DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the processing method adopted, the whiskers are easily broken by ball milling, which reduces the wear resistance, high temperature resistance and oxidation resistance of the composite material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for dispersing single crystal sapphire fiber in alumina ceramic composite material, comprising: a, preparation of coating gel; b, surface coating treatment of single crystal sapphire fiber; c, applying single crystal sapphire with coating The fibers and dispersant are mixed, ultrasonically or boiled, then added to the zirconia ceramic powder, vacuum dried, d, molding, and sintering the ceramic composite material.

[0029] The coating is a zirconia coating with a thickness of 5-10 microns. The preparation method of the coating gel is as follows: dissolving 53 g of zirconium propoxide in 175 ml of ethanol, adding 6 ml of acetylacetone and 4 ml of water while stirring, It was aged at room temperature for 24 hours to form a gel.

[0030] The surface coating treatment of the single crystal sapphire fiber is as follows: adding the single crystal sapphire fiber into the gel to stir, drying, volatilizing ethanol, acetylacetone and water, and completing the first coatin...

Embodiment 2

[0037] A method for dispersing single crystal sapphire fiber in alumina ceramic composite material, comprising: a, preparation of coating gel; b, surface coating treatment of single crystal sapphire fiber; c, applying single crystal sapphire with coating The fibers and dispersant are mixed, ultrasonically or boiled, then added to the zirconia ceramic powder, vacuum dried, d, molding, and sintering the ceramic composite material.

[0038] The coating is a zirconia coating with a thickness of 5-10 microns. The preparation method of the coating gel is as follows: dissolving 53 g of zirconium propoxide in 175 ml of ethanol, adding 6 ml of acetylacetone and 4 ml of water while stirring, It was aged at room temperature for 24 hours to form a gel.

[0039] The surface coating treatment of the single crystal sapphire fiber is as follows: adding the single crystal sapphire fiber into the gel and stirring, drying at 60°C, volatilizing ethanol, acetylacetone and water, and completing the...

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Abstract

The invention provides a dispersion method of single crystal sapphire fiber in an aluminum oxide ceramic composite material. The dispersion method comprises the following steps: (a) preparing coating gel; (b) processing surface coating of the single crystal sapphire fiber; (c) uniformly mixing the single crystal sapphire fiber accompanied by coating and a dispersing agent, adding the mixture to zirconia ceramic powder after ultrasonic wave or boiling, and carrying out vacuum drying; and (d) sintering the ceramic composite material. By utilizing the dispersion method, the single crystal sapphire fiber is added to the zirconia ceramic powder to prepare the composite ceramic material, and the tolerance degree of the composite material in extreme environment is greatly increased. The dispersion method has great practical value and social meaning.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a method for dispersing single crystal sapphire fibers in alumina ceramic composite materials and a composite material. Background technique [0002] Single crystal sapphire fiber is a single crystal alumina fiber (whisker) with a certain length-to-diameter ratio, which is completely different from the use and preparation method of semiconductor substrate sapphire wafer material. High melting point, high strength, high modulus, and strong corrosion resistance are comprehensive requirements for the third generation of advanced composite materials. The single crystal sapphire fiber is currently the best choice to meet the comprehensive requirements. [0003] When the single crystal sapphire fiber with a diameter of micron is added to the products produced by other materials, there will be various miraculous changes. Tsinghua Dongguan Innovation Center successfully introduced th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/48C04B35/628C04B35/622
Inventor 金磊吴韬维克托冯晓野范璐
Owner TSINGHUA INNOVATION CENT IN DONGGUAN
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