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Ceramic material with amorphous/nanocrystalline structure and method of producing the same

A ceramic material and nanocrystalline technology, applied in the field of ceramic materials, can solve the problems of poor product performance, strong fatigue, high sintering temperature, and achieve the effect of improving mechanical properties

Active Publication Date: 2009-08-19
哈尔滨霈泽材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a method that can solve the problems of high sintering temperature and long sintering time in the preparation process of existing ceramic composite materials, and the poor performance of the product is difficult to meet the application requirements of high stress, impact, strong fatigue and other working conditions. A kind of ceramic material with amorphous / nanocrystalline structure and preparation method thereof

Method used

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  • Ceramic material with amorphous/nanocrystalline structure and method of producing the same
  • Ceramic material with amorphous/nanocrystalline structure and method of producing the same
  • Ceramic material with amorphous/nanocrystalline structure and method of producing the same

Examples

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Embodiment 1

[0034] This embodiment is realized according to the following steps:

[0035] 1. It is made by weighing 1 part of mixed ceramic powder, 0.4-1 part of deionized water and 0.01-0.015 parts of binder according to the ratio of parts by mass, wherein the mixed powder consists of 60%-99.9% of the main phase by mass percentage Ceramics (composed of 50% to 99% of nano-alumina and 1% to 50% of nano-titanium oxide) and 0.1% to 40% of additive phase ceramics, and the binder is polyvinyl alcohol;

[0036] 2. Use a ball mill to uniformly mix the above mixed ceramic powder, deionized water and binder to obtain a slurry;

[0037] 3. The slurry is spray-dried and then granulated to obtain nanocomposite powder. When the spray dryer is working, the inlet temperature is 210-240°C, the outlet temperature of the spray dryer is 100-120°C, and the nozzle speed of the spray dryer is 20000-36000r / min;

[0038] 4. Put the regranulated nano-composite powder into an alumina crucible, heat up to 1100-1...

Embodiment 2

[0042] The basic implementation steps of this embodiment are the same as those of Example 1. The difference from Example 1 is that the ceramic material is made of 1 part of mixed powder, 0.7 part of deionized water and 0.012 part of binder in terms of parts by mass. Others are the same as in Example 1.

Embodiment 3

[0044] The basic implementation steps of this embodiment are the same as those of Example 1, and the difference from Example 1 is that the mixed powder is composed of 60%-97% nano-alumina and 3%-40% nano-titanium oxide by mass percentage. Others are the same as in Example 1.

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Abstract

The invention aims at disclosing a ceramics material with an amorphous / nanocrystalline structure and a preparation method thereof. The method solves the problems that in the existing preparation process of ceramics composite material, the sintering temperature is high, the sintering time is long and the performance of the product is weak. The ceramics material of the invention is manufactured by subjecting a main phase ceramics powder and an additive phase ceramics powder to powder metallurgy technique. The method has the following steps: 1. the raw material of ceramics powder is granulated into ceramics composite powder; 2. heat treatment is carried out on the ceramics composite powder; 3. after the heat treatment, shaping and heat insulation sintering are carried out on the obtained composite powder, thus finally obtaining the ceramics material. In the invention, the sintering temperature in the preparation process of ceramics materials is lowered, the sintering time is shortened, and in particular, the internal arrangement of the amorphous / nanocrystalline structure in the ceramics materials improves strength, toughness, hardness of the ceramics materials of the ceramics materials, enhances high temperature resistance, wear resistance, corrosion resistance and chemical stability thereof.

Description

(1) Technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a method for firstly granulating powder, then heat-treating composite powder, and then preparing ceramic material and ceramic material products from the powder obtained by heat treatment. (2) Background technology [0002] A class of advanced structural ceramic materials with excellent properties such as high strength, high toughness, high hardness, high temperature resistance, wear resistance, corrosion resistance, and good chemical stability have gradually become an important part of aerospace, ships, automobiles, new energy, electronic information, It is an indispensable key material in the fields of metallurgy, chemical industry and other industrial technologies. [0003] However, the current ceramic materials widely have the disadvantages of high brittleness and poor reliability, which limit the development and practical application of their related properties....

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/626C04B35/64
Inventor 王铀杨勇
Owner 哈尔滨霈泽材料科技有限公司
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