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Preparation method of high-aspect ratio zirconia whiskers

A high aspect ratio, zirconia technology, applied in chemical instruments and methods, single crystal growth, crystal growth and other directions, can solve the problems of low aspect ratio of rod-shaped zirconia, can not achieve toughening effect, etc., to achieve the preparation cycle Short, easy mass production, simple process effect

Active Publication Date: 2018-08-28
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses expensive tetragonal zirconia powder as the reaction precursor, and the obtained rod-shaped zirconia has a length of 200-350 nm and an aspect ratio of only 4-9. From the perspective of whisker toughening, the rod-shaped zirconia The aspect ratio of zirconium is obviously low, and the actual toughening effect cannot be achieved

Method used

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  • Preparation method of high-aspect ratio zirconia whiskers
  • Preparation method of high-aspect ratio zirconia whiskers

Examples

Experimental program
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Effect test

Embodiment 1

[0020] With zirconium oxychloride as precursor, sodium chloride as molten salt, trisodium phosphate dodecahydrate as whisker growth aid, first weigh 2g of zirconium oxychloride, 2g of sodium chloride and 0.2g of dodeca Trisodium phosphate water, the mass ratio is 10:10:1, mixed and ground until uniform, then the mixture is placed in a corundum crucible and heated in a resistance furnace, and the temperature is raised to 1000°C at 5°C / min and kept for 5 hours. After it was cooled to room temperature, the obtained calcined product was washed three times with deionized water, then washed once with absolute ethanol, and finally dried at 80 °C for 5 hours to obtain a calcination product with a length of 5-6 µm and an average aspect ratio of 30 Zirconia whiskers.

Embodiment 2

[0022] Using zirconium oxychloride as the precursor, sodium chloride as the molten salt, and trisodium phosphate dodecahydrate as the whisker growth aid, the process for preparing zirconia whiskers is the same as in Example 1, except that the heat treatment system is 3°C / min Raise the temperature to 800°C for 7 hours to obtain zirconia whiskers with a length of 2-3 µm and an average aspect ratio of 20.

Embodiment 3

[0024] With zirconium oxychloride as precursor, sodium chloride as molten salt, and trisodium phosphate dodecahydrate as whisker growth aid, the mass ratio of the three substances is 10:5:0.5. The process for preparing zirconia whiskers is the same as The same as in Example 1, except that the heat treatment system is 900°C for 3 hours to obtain zirconia whiskers with a length of 4-6 μm and an average aspect ratio of 30.

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Abstract

The invention discloses a preparation method of high-aspect ratio zirconia whiskers. The method comprises the following steps: taking a zircon salt as a reaction precursor, mixing and grinding the reaction precursor, a fused salt and a whisker growth aid at a room temperature according to a certain mass ratio, performing heat treatment, washing and drying, thereby obtaining the zirconia whiskers.Compared with the prior art, the method has the advantages that the used reaction precursor is low in price, the fused salt and the whisker growth aid are cheap and environmentally friendly, the operation process is simple and easy to control, the preparation cycle is short, the mean aspect ratio of the obtained whiskers reaches 30, and the whiskers are high in quality and suitable for large-scaleproduction. Therefore, the preparation method has wide application prospects.

Description

technical field [0001] The invention belongs to the field of novel inorganic non-metallic materials. In particular, it relates to a preparation method of high aspect ratio zirconia whiskers with strengthening and toughening effects. Background technique [0002] Since the first discovery of whisker materials by scientists from the Bell Telephone Company of the United States in 1948, the research and development of whisker-reinforced composite materials have been highly valued for many years because of their potential to achieve high strength and high toughness. In recent years, the preparation of various whiskers has come out one after another, and has been widely used in military and civilian fields. The reason why the whisker has such excellent properties is that the whisker is a fibrous single crystal, its internal and external structure is highly consistent, and its strength is close to the theoretical value of the crystal. In view of this, if zirconia with high streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/16C30B29/62C30B9/12
CPCC30B9/12C30B29/16C30B29/62
Inventor 江伟辉王涛刘健敏徐贵荣冯果陈婷苗立锋张权
Owner JINGDEZHEN CERAMIC UNIV