Thermal-shock-resistant oxide wave-transparent ceramic material and preparation method thereof

A technology of ceramic materials and thermal shock resistance, which is applied in the field of thermal shock resistant oxide wave-transparent ceramic materials and its preparation, can solve the problems of material damage, limit the application range of materials engineering, poor reliability, etc., reduce the coefficient of thermal expansion and improve mechanical properties Performance and high temperature stability, low cost effect

Active Publication Date: 2021-02-09
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Oxide wave-transparent ceramic materials, especially ceramic materials such as alumina and magnesia-aluminum spinel, are affected by their large thermal expansion coefficients. Under the environment of rapid heating or cooling, great thermal stress will be generated inside, resulting in Material damage leads to poor reliability, which severely limits the scope of engineering applications of this type of material

Method used

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  • Thermal-shock-resistant oxide wave-transparent ceramic material and preparation method thereof

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preparation example Construction

[0039] figure 1 It is a flow chart of the preparation of the thermal shock resistant oxide wave-transparent ceramic material of the present invention. The preparation method of the thermal shock resistant oxide wave-transparent ceramic material comprises the following steps:

[0040] (1) Prepare zirconium calcium phosphate ceramic particles, the specific process is as follows:

[0041] According to CaZr 4 (PO 4 ) 6 According to the corresponding molar ratio, the calcium-containing compound is first dissolved in the phosphoric acid solution, and then the zirconium-containing compound is added, mixed evenly by ball milling or stirring, then dried and sieved, and heat-treated in an air atmosphere to obtain calcium-zirconium phosphate ceramic particles. The calcium-containing compound is one or more of calcium hydroxide, calcium oxide or calcium carbonate, and the zirconium-containing compound is one or more of zirconium oxide, zirconium hydroxide or zirconium carbonate. The ...

Embodiment 1

[0051] According to CaZr 4 (PO 4 ) 6 According to the corresponding molar ratio, calcium hydroxide is firstly dissolved in the phosphoric acid solution, and then zirconium oxide is added, mixed by ball milling, dried and sieved, heat treated at 1400°C for 2 hours, and a well-crystallized calcium zirconium phosphate ceramic powder is obtained.

[0052] Add the calcium zirconium phosphate powder into the silica sol solution and stir evenly. The silica sol accounts for 5% by volume of the coated particles, the average particle diameter of the silica sol is 10nm, and the mass percentage concentration is 4%. It is powdered by spray drying, and then in Heat treatment at 1150°C for 2 hours to obtain calcium zirconium phosphate ceramic particles coated with silica with a particle size of 10 microns.

[0053] In the quartz powder, 18% by volume of silicon dioxide-coated calcium zirconium phosphate ceramic particles is mixed, and the addition ratio of solvent water is 120% of the tota...

Embodiment 2

[0055] According to CaZr 4 (PO 4 ) 6 According to the corresponding molar ratio, firstly dissolve calcium carbonate in the phosphoric acid solution, then add zirconium hydroxide and zirconium carbonate, mix evenly by ball milling, dry and sieve, heat treatment in air atmosphere at 1300°C for 3 hours, and obtain well-crystallized calcium zirconium phosphate ceramic powder .

[0056] Add the calcium zirconium phosphate powder into the silica sol solution and stir evenly. The silica sol accounts for 15% by volume of the coated particles, the average particle diameter of the silica sol is 20nm, and the mass percentage concentration is 10%. Heat treatment at 1250° C. for 1 h in an atmosphere to obtain silicon dioxide-coated zirconium calcium phosphate ceramic particles with a particle size of 25 microns.

[0057] In yttrium silicate (Y 2 o 3 ·SiO2 2 ) The ceramic material powder is mixed with 60% by volume of silica-coated calcium zirconium phosphate ceramic particles, and th...

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Abstract

The invention relates to a thermal-shock-resistant oxide wave-transparent ceramic material and a preparation method thereof. The ceramic material comprises the following components in percentage by volume: 20-92% of an oxide ceramic matrix with a dielectric constant less than or equal to 10 and 8%-80% of silicon dioxide-coated calcium zirconium phosphate ceramic. The linear expansion coefficient of the material at a room temperature of -1000 DEG C ranges from 0*10<-6> / K to 0.3*10<-6> / K, and the material has excellent thermal shock resistance and good dielectric and mechanical properties. According to the invention, a certain proportion of nano-silica coated calcium zirconium phosphate ceramic particles are introduced into a low-dielectric oxide ceramic material, and the ceramic material with an expansion coefficient close to zero is obtained through air atmosphere high-temperature heat treatment. The method is based on a mature ceramic material preparation method, and is simple to operate, short in period, low in cost, low in process amplification difficulty and easy to realize engineering.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a thermal shock-resistant oxide wave-transparent ceramic material and a preparation method thereof. Background technique [0002] Oxide wave-transparent ceramic materials, especially ceramic materials such as alumina and magnesia-aluminum spinel, are affected by their large thermal expansion coefficients. Under the environment of rapid heating or cooling, great thermal stress will be generated inside, resulting in Material damage leads to poor reliability, which severely limits the scope of engineering applications of this type of material. Therefore, if the thermal expansion coefficient of the oxide thermal wave-transparent ceramic material can be reduced to zero or close to zero, the thermal stress of the material can be greatly reduced, and the reliability of this type of material in an environment with rapid temperature changes can be significantly im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/628C04B35/626C04B35/447C04B35/16C04B35/10C04B35/443C04B35/185C04B35/505C04B35/08
CPCC04B35/14C04B35/622C04B35/62807C04B35/447C04B35/626C04B35/16C04B35/10C04B35/443C04B35/185C04B35/505C04B35/08C04B2235/447C04B2235/9607
Inventor 周军张大海张敬义刘晓明张娟曹淑伟
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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