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Zircon corundum ceramics

A zirconium corundum and ceramic technology, applied in the field of ceramics, can solve the problems of high temperature parts, poor wear resistance, increased waste discharge, etc., and achieve the effects of superior thermal shock resistance, reduced glass phase content, and reduced production energy consumption.

Inactive Publication Date: 2012-09-05
中山市华山特种陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the large thermal expansion coefficient, poor toughness and wear resistance of traditional ceramics, they are easily broken in high-temperature environments, so their application fields are greatly limited and cannot be used in high-temperature parts, especially in places where cold and hot alternate frequently. The firing temperature of traditional wear-resistant ceramics is high, which increases the production energy consumption of wear-resistant ceramics and increases the waste discharge during the firing process of ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Weigh the following raw materials in proportion: ZrO 2 30kg, mullite 51kg, Al 2 o 3 15kg, talc 2kg, rhodium trioxide 0.7kg, dispersant 1.3kg, the raw materials except dispersant are mixed and ball milled, spray granulated, then the granules obtained by spray granulation are put into sugar granulator, then add dispersant to make Granules, then hydraulically formed, dried in a drying room, loaded into a kiln and fired, that is, the zirconium corundum ceramics of the present invention are obtained, and then inspected and packaged for storage.

Embodiment 2

[0014] Weigh the following raw materials in proportion: ZrO 2 32kg, mullite 48kg, Al 2 o 3 15kg, talc 3kg, rhodium trioxide 0.5kg, dispersant 1.5kg, the raw materials except the dispersant are mixed and ball milled, spray granulated, then the granules obtained by the spray granulation are put into the sugar granulator, and the dispersant is added to make Granules, then hydraulically formed, dried in a drying room, loaded into a kiln and fired, that is, the zirconium corundum ceramics of the present invention are obtained, and then inspected and packaged for storage.

Embodiment 3

[0016] Weigh the following raw materials in proportion: ZrO 2 33kg, mullite 50kg, Al 2 o 3 18kg, talc 4kg, rhodium trioxide 0.6kg, dispersant 1.2kg, the raw materials except the dispersant are mixed and ball milled, spray granulated, then the granules obtained by the spray granulation are put into the sugar granulator, and the dispersant is added to make Granules, then hydroformed, dried in a drying room, fired in a kiln, and then the zirconium corundum ceramics of the present invention are obtained, and then packed and put into storage after inspection.

[0017] Get the zirconium corundum ceramics prepared in Example 1 to carry out conventional performance measurement, obtain following parameters:

[0018] Bulk density g / cm3 ≥3.6

[0019] Normal temperature compressive strength MPa ≥400

[0020] Abrasion resistance cm3 ≤0.5

[0021] Rockwell hardness HRA ≥80

[0022] Room temperature-1200℃ average coefficient of linear expansion a×10-61 / ℃≤7.4

[0023] It can be seen th...

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PUM

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Abstract

The invention discloses a zircon corundum ceramic, which is characterized in that the zircon corundum ceramic is prepared from the following raw materials in percentage by weight: 30 to 33 percent of ZrO2, 48 to 52 percent of mullite, 15 to 18 percent of Al2O3, 2 to 5 percent of talcum, 0.5 to 0.7 percent of rhodium sesquioxide and 1.0 to 1.57 percent of dispersant. The zircon corundum-mullite composite abrasion-resistant ceramic provided by the invention contains considerable amount of mullite phase with low thermal expansion coefficient, has excellent shock resistance, can be used for high-temperature parts, and particularly can be used for frequently cold and hot alternated parts; the zircon corundum ceramic is toughened through zirconia, and is subjected to thermal treatment at a cooling stage so that the content of glass phase is reduced and the abrasion resistance of the zircon corundum ceramic is improved; and the sintering temperature of the zircon corundum ceramics of the invention is about 200 DEG C lower than that of the conventional abrasion-resistant ceramic, the production energy consumption of the abrasion-resistant ceramic is greatly reduced, and the zircon corundum ceramic contributes to energy conservation and emission reduction.

Description

technical field [0001] The present invention relates to a ceramic. Background technique [0002] Due to the large thermal expansion coefficient, poor toughness and wear resistance of traditional ceramics, they are easily broken in high-temperature environments, so their application fields are greatly limited and cannot be used in high-temperature parts, especially in places where cold and hot alternate frequently. The firing temperature of traditional wear-resistant ceramics is high, which increases the production energy consumption of wear-resistant ceramics and increases the waste discharge during the firing process of ceramics. Contents of the invention [0003] In order to overcome the shortcomings of the prior art, the invention provides a zirconium corundum ceramic with low thermal expansion coefficient, good toughness and good wear resistance. [0004] The technical solution adopted by the present invention to solve its technical problems is: [0005] Zirconium co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/185
Inventor 徐真祥程国胜潘起雄
Owner 中山市华山特种陶瓷有限公司