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High-temperature thermal shock resistant aluminum oxide ceramic burning loading plate and preparation process thereof

A technology of alumina ceramics and thermal shock resistance, which is applied in the field of refractory materials, can solve the problems of poor thermal shock resistance and low average cycle rate, and achieve the effects of good thermal shock resistance, improved fluidity, and uniform microstructure

Active Publication Date: 2014-07-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention overcomes the disadvantages of poor thermal shock resistance and low average cycle utilization rate of existing 99 alumina ceramics, and provides a high-temperature thermal shock-resistant 99 alumina ceramic setter plate with excellent price-performance ratio by using relatively low-priced powder. , and its preparation process is provided

Method used

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  • High-temperature thermal shock resistant aluminum oxide ceramic burning loading plate and preparation process thereof
  • High-temperature thermal shock resistant aluminum oxide ceramic burning loading plate and preparation process thereof
  • High-temperature thermal shock resistant aluminum oxide ceramic burning loading plate and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare raw materials according to 20 parts of alumina microspheres, 80 parts of alumina ceramic powder, 0.3 parts of sintering aid, and 5 parts of binder (PVA); mix the raw materials in the ball mill for dry ball milling 6 Hours, the powder is stale for one day after the powder is prepared; the prepared powder is passed through a 60-200 mesh sieve, dry-pressed under a pressure of 100 MPa, dried to a moisture content of less than 0.5%, and then traditionally pressureless sintered in a resistance furnace to sinter The temperature is 1600°C; the firing temperature system is to first raise the temperature to 100°C at a heating rate of 1°C / min, keep it for 120 minutes, and then raise the temperature to 50°C before the firing temperature at a heating rate of 1°C / min, then change to slow firing 200 minutes to firing temperature, heat preservation 120min.

[0025] The setter plate prepared in this example has a bulk density of 3.4028 g / cm3, a flexural strength of 146.157 MPa, ...

Embodiment 2

[0027] The present invention prepares raw materials according to 30 parts by weight of alumina ceramic granulation powder, 70 parts by weight of alumina ceramic powder, 0.5 parts of sintering aid, and 5 parts by weight of binder (PVA); mix the raw materials in the ratio in a ball mill Ball milling by medium dry method for 10 hours, the powder is stale for one day after the powder is obtained; the prepared powder is passed through a 60-200 mesh sieve, dry-pressed under a pressure of 100 MPa, dried until the moisture is less than 0.5%, and then carried out in a resistance furnace. Pressing and sintering, the firing temperature is 1620°C.

[0028] The setter plate prepared in this example has a bulk density of 3.3016 g / cm3, a flexural strength of 126.157 MPa, and a thermal shock resistance of 84 times under the condition of 1000°C for 30 minutes and air cooling.

Embodiment 3

[0030] Prepare raw materials according to 40 parts of alumina ceramic granulation powder, 50 parts of alumina ceramic powder, 0.5 parts of sintering aid, and 5 parts of binder (PVA); mix the raw materials in the ball mill by dry method After ball milling for 10 hours, the powder is stale for one day after the powder is prepared. The prepared powder is passed through a 60-200 mesh sieve, dry-pressed under a pressure of 100 MPa, dried to a moisture content of less than 0.5%, and then subjected to traditional pressureless sintering in a resistance furnace. The firing temperature is 1640°C; the firing temperature system is to first raise the temperature to 100°C at a heating rate of 1°C / min, hold the temperature for 120 minutes, and then raise the temperature to 50°C before the firing temperature at a heating rate of 1°C / min, then slow down Burn for 200 minutes to the firing temperature and keep warm for 120 minutes.

[0031] It can be obtained with a bulk density of 3.2074 g / cm3,...

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Abstract

The invention provides a high-temperature thermal shock resistant aluminum oxide ceramic burning loading plate and a preparation process thereof. A corundum high-temperature thermal shock resistant burning loading plate with reasonable cost performance and good properties is prepared by improving raw materials and sintering processes. The obtained burning loading plate is non-deformable and good in thermal shock resistance when used at high temperature, and can be used as a burning loading plate applied to the field of electronic ceramics, high-temperature ceramics and the like under the condition of more than 1650 DEG C.

Description

technical field [0001] The invention relates to an alumina ceramic setter plate prepared by using alumina ceramic granulated powder as the main aggregate and a preparation process thereof, belonging to the field of refractory materials. Background technique [0002] As a typical representative of engineering ceramics, Al 2 o 3 Ceramics have the advantages of high strength, high hardness, high temperature resistance, wear resistance, etc., and are widely used in metallurgy, chemical industry, machinery and other fields. However, its high sintering temperature, high brittleness and poor thermal shock resistance limit its wide application in the field of high temperature engineering. Therefore, improving the thermal shock resistance has always been Al 2 o 3 A research hotspot of ceramics has important engineering significance. Most of the current research is to add second phases such as whiskers and particles to form composite materials, but this method will greatly increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/66C04B35/622
Inventor 侯宪钦雷佩佩王志邴祥王志青朱楠楠
Owner UNIV OF JINAN
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