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Kinetics Study on Low Temperature Sintered Alumina Ceramics

Xiang Sun

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Abstract

Alumina ceramics is densely sintered at 1450℃ by using CaO-MgO-SiO2 glass(CMS-G) and TiO2 as sintering assistant.The effect that the weight content of CMS-G and TiO2 to sintering character,and fine texture and sintering kinetics of alumina ceramics is studied.The results show that CMS-G and TiO2 can accelerate density of alumina ceramics effectively,the relative density of alumina ceramics is up to 98.25%,when content of CMS-G is 3% and TiO2 is 1%.Sintering process is controlled by diffusion,and activation energy of liquid phase sintering is 113.4kJ/mol.

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What this paper is about

Alumina ceramics is densely sintered at 1450℃ by using CaO-MgO-SiO2 glass(CMS-G) and TiO2 as sintering assistant.The effect that the weight content of CMS-G and TiO2 to sintering character,and fine texture and sintering kinetics of alumina ceramics is studied.The results show that CMS-G and TiO2 can accelerate density of alumina ceramics effectively,the relative density of alumina ceramics is up to 98.25%,when content of CMS-G is 3% and TiO2 is 1%.Sintering process is controlled by diffusion,and activation energy of liquid phase sintering is 113.4kJ/mol.

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Available abstract

Alumina ceramics is densely sintered at 1450℃ by using CaO-MgO-SiO2 glass(CMS-G) and TiO2 as sintering assistant.The effect that the weight content of CMS-G and TiO2 to sintering character,and fine texture and sintering kinetics of alumina ceramics is studied.The results show that CMS-G and TiO2 can accelerate density of alumina ceramics effectively,the relative density of alumina ceramics is up to 98.25%,when content of CMS-G is 3% and TiO2 is 1%.Sintering process is controlled by diffusion,and activation energy of liquid phase sintering is 113.4kJ/mol.

Key concepts: Sintering, Materials science, Ceramic, Activation energy, Alumina ceramic, Liquid phase, Kinetics, Relative density

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