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Technique for preparing liquid phase sintering silicon carbide ceramic

A technology of silicon carbide ceramics and production process, which is applied in the field of ceramics and can solve the problems of low utilization rate of ball milling equipment

Inactive Publication Date: 2009-07-22
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The technical problem to be solved by the present invention is to provide a new solution that helps to solve the problems of long-time ball milling and low utilization rate of ball milling equipment in the above process

Method used

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  • Technique for preparing liquid phase sintering silicon carbide ceramic

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: get yttrium oxide and alumina raw material, with Y 2 o 3 : Al 2 o 3 =3: The ratio (molar ratio) of 5~7, weighs material by 5 kilograms of total weights, and the total weight that weighs is that 5 kilograms of yttrium oxide and aluminum oxide raw materials are sent in the ball mill, ball milled 16~24 hours, make 5 Kilograms of the flux prefabricated material;

[0031] Take by weighing 0.5 kg of the flux preform each time, and weigh 5 to 8 kg of silicon carbide powder and other ingredients (appropriate amount of binder, appropriate amount of plasticizer, appropriate amount of lubricant, etc.) at the same time, and make a dry weight approx. 5.5-8.5 kg of material, put the material into the ball mill, add appropriate amount of water, ball mill for 1-2 hours, after that, take out the processed material, dry, granulate, and mold it at 150℃~300℃ Solidify at an appropriate temperature for 1-2 hours, cool to room temperature and perform rough machining by mecha...

Embodiment 2

[0033] Embodiment 2: get yttrium oxide and alumina raw material, with Y 2 o 3 : Al 2 o 3 =3: The ratio (molar ratio) of 5~7, weighs material by 5 kilograms of total weights, and the total weight that weighs is that 5 kilograms of yttrium oxide and aluminum oxide raw materials are sent in the ball mill, ball milled 16~24 hours, make 5 Kilograms of the flux prefabricated material;

[0034] Take by weighing 0.5 kg of the flux preform each time, and weigh 5 to 8 kg of silicon carbide powder and other ingredients (appropriate amount of binder, appropriate amount of plasticizer, appropriate amount of lubricant, etc.) at the same time, and make a dry weight approx. 5.5-6 kg of material, put the material into a mechanical stirring tank, add appropriate amount of water to form a slurry material, stir the slurry material for 1-2 hours by mechanical stirring, and then take out the processed material, Drying, granulation, compression molding, solidification at an appropriate temperatu...

Embodiment 3

[0036] Embodiment 3: get yttrium oxide and alumina raw material, with Y 2 o 3 :Al 2 o 3 =3: The ratio (molar ratio) of 5~7, weighs material by 5 kilograms of total weights, and the total weight that weighs is that 5 kilograms of yttrium oxide and aluminum oxide raw materials are sent in the ball mill, ball milled 16~24 hours, make 5 Kilograms of the flux prefabricated material;

[0037] Take by weighing 0.5 kg of the flux preform each time, and weigh 5 to 8 kg of silicon carbide powder and other ingredients (appropriate amount of binder, appropriate amount of plasticizer, appropriate amount of lubricant, etc.) at the same time, and make a dry weight approx. 5.5-8.5 kg of material, put the material into a mechanical stirring tank or a mechanical mixer, add an appropriate amount of water to form a slurry material, stir the slurry material for 1 hour by mechanical stirring, and then mix the slurry Transfer the material into a high-power ultrasonic treatment tank, apply high-p...

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Abstract

The invention relates to a production process of liquid-phase sintered silicon carbide ceramics, which belongs to the field of ceramics. In the mixing process of the existing liquid-phase sintered silicon carbide ceramics production process, there are problems such as excessively long ball milling time and low overall utilization rate of ball milling equipment. The present invention aims to solve the above problems. The raw materials used in the scheme of this case include silicon carbide powder, yttrium oxide, aluminum oxide and binder. After mixing, molding, curing, high-temperature sintering and other processes, silicon carbide ceramic products are formed. The main point of this case is that the process includes the following steps: a , mix the two raw materials of yttrium oxide and aluminum oxide, perform ball milling, and use mechanochemical method to generate flux preform; b, mix flux preform with silicon carbide powder and binder, etc., after molding, curing, high temperature Sintering and other processes to form silicon carbide ceramic products. In this case, the mechanochemical method is used to pre-generate the flux prefabricated material, which helps to greatly reduce the ball grinding time and help to improve the overall utilization rate of the ball milling equipment.

Description

technical field [0001] The invention relates to a production process of liquid-phase sintered silicon carbide ceramics, which belongs to the field of ceramics. Background technique [0002] Silicon carbide ceramic materials have excellent characteristics such as high temperature strength, high temperature oxidation resistance, good wear resistance, good thermal stability, small thermal expansion coefficient, high thermal conductivity, high hardness, thermal shock resistance and chemical corrosion resistance. Automobiles, mechanical chemicals, environmental protection, space technology, information electronics, energy and other fields have increasingly wide applications, and have become an irreplaceable structural ceramic with excellent performance in many industrial fields. [0003] In the automobile industry, in order to improve the thermal efficiency of the engine, make full use of energy, reduce fuel consumption, and reduce air pollution, it is hoped that the operating te...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/64
Inventor 李榕生水淼陈红兵干宁宋岳王霞胡乾林安任元龙
Owner NINGBO UNIV
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