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A kind of preparation method of zirconia-mullite high porosity ceramic material

A ceramic material and mullite technology, which is applied in the field of preparation of zirconia-mullite porous ceramic materials, can solve the problems of low high temperature strength and toughness, unreasonable structure, low use temperature, etc. Conducive to the effect of reducing and high porosity

Active Publication Date: 2020-12-29
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a preparation method of zirconia-mullite high-porosity ceramic material for the deficiencies in the above-mentioned prior art, with alumina and zircon sand as the main raw materials, and yttrium oxide as the main raw material. The stabilizer, with aluminum fluoride as an additive, adopts a combination of polyurethane foam impregnation and gel curing to prepare a zirconia-mullite porous ceramic material with acicular mullite whisker structure through in-situ synthesis technology, The solvent volatilization and pyrolysis of organic matter in the green body form a porous structure, which has the characteristics of high porosity (greater than 80%), uniform pore size distribution, high-temperature mechanical properties and thermal shock resistance, so as to overcome the current mullite-based porous ceramics. Disadvantages of unreasonable structure, low porosity, low service temperature and low high temperature strength and toughness

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Embodiment 1

[0043] A kind of preparation method of zirconia-mullite ceramic material, concrete steps are as follows:

[0044] 1. Ingredients: calculated by weight percentage: zircon sand 48%, alumina 40%, yttrium oxide 4%, additive aluminum fluoride 8%, prepare alumina powder, zircon sand powder, yttrium oxide powder and Aluminum fluoride powder; weigh alumina powder, zircon sand powder, and yttrium oxide powder according to the proportioning requirements, and mix to obtain mixed powder; aluminum fluoride is used in step 6;

[0045] 2. According to the weight ratio of organic monomer: crosslinking agent: deionized water = 9:1:90 to prepare the premix, add 60 parts of the mixed powder in step 1 to the weight of 100 parts of the premix, and then add 0.5 parts Dispersant, then put into a high-energy ball mill for ball milling for 30 hours at a ball milling speed of 500 rpm to obtain a slurry;

[0046] 3. Filter out the slurry after ball milling, inject high elastic polyurethane foam with a ...

Embodiment 2

[0051] A kind of preparation method of zirconia-mullite ceramic material, concrete steps are as follows:

[0052] 1. Ingredients: by weight percentage: 48% zircon sand, 40% alumina, 6% yttrium oxide, 6% aluminum fluoride additive, prepare alumina powder, zircon sand powder, yttrium oxide powder and Aluminum fluoride powder; weigh alumina powder, zircon sand powder, and yttrium oxide powder according to the proportioning requirements, and mix to obtain mixed powder; aluminum fluoride is used in step 6;

[0053] 2. According to the weight ratio of organic monomer: crosslinking agent: deionized water = 9:1:90 to prepare the premix, add 80 parts of the mixed powder in step 1 to the weight of 100 parts of the premix, and then add 0.5 parts Dispersant, then put into a high-energy ball mill for ball milling for 24 hours at a ball milling speed of 600 rpm to obtain a slurry;

[0054] 3. Filter out the slurry after ball milling, inject high elastic polyurethane foam with a pore size o...

Embodiment 3

[0059] A kind of preparation method of zirconia-mullite ceramic material, concrete steps are as follows:

[0060] 1. Ingredients: calculated by weight percentage: zircon sand 48%, alumina 40%, yttrium oxide 4%, additive aluminum fluoride 8%, prepare alumina powder, zircon sand powder, yttrium oxide powder and Aluminum fluoride powder; weigh alumina powder, zircon sand powder, and yttrium oxide powder according to the proportioning requirements, and mix to obtain mixed powder; aluminum fluoride is used in step 6;

[0061] 2. According to the weight ratio of organic monomer: crosslinking agent: deionized water = 18:2:80 to prepare the premix, add 70 parts of the mixed powder in step 1 to the weight of 100 parts of the premix, and then add 1 part Dispersant, then put into a high-energy ball mill for ball milling for 30 hours at a ball milling speed of 650 rpm to obtain a slurry;

[0062] 3. Filter out the slurry after ball milling, inject high elastic polyurethane foam with a po...

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Abstract

The invention discloses a preparation method of a zirconium oxide-mullite porous ceramic material. The preparation method is characterized in that aluminum oxide and zircon sand are taken as main rawmaterials, yttrium oxide is taken as a stabilizer, aluminum fluoride is taken as an additive, a forming mode combining polyurethane foam dipping and gel solidification is adopted, and the zirconium oxide-mullite porous ceramic material with a needle-shaped mullite whisker structure is prepared through an in-situ synthesis technology; and a solvent in a blank is volatilized and organic substances are split at a high temperature to form a porous structure which has the characteristics of being high in porosity (greater than 80%), uniform in aperture distribution, excellent in high-temperature mechanical property and excellent in thermal impact resistance.

Description

technical field [0001] The invention belongs to the technical field of inorganic ceramic materials, and in particular relates to a preparation method of a zirconia-mullite porous ceramic material. Background technique [0002] With the development of the national economy and the acceleration of the industrialization process, the contradiction between energy supply and demand in my country has become increasingly prominent, and the problem of environmental pollution has become prominent. At present, environmental pollution protection and governance has become an important focus of the Chinese government and one of the important means of supply-side reform. Therefore, it is very urgent and important to seek efficient and clean combustion technologies that are beneficial to environmental protection, and to tap and develop low-grade or low-calorific-value energy sources for the adjustment of my country's energy structure and the sustainable development of the ecological environm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/48C04B35/622C04B35/638
CPCC04B35/481C04B35/622C04B35/638C04B38/067C04B2235/3208C04B2235/3217C04B2235/3225C04B2235/3232C04B2235/3272C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607C04B38/0074
Inventor 杜贤武丁翠娇曹炳雷韩斌
Owner 武汉钢铁有限公司
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