KINETICS OF CARBOTHERMAL REDUCTION AND NITRIDATION OF SILICON DIOXIDE CARBON MIXTURE

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题名:	KINETICS OF CARBOTHERMAL REDUCTION AND NITRIDATION OF SILICON DIOXIDE CARBON MIXTURE
作者:	LIOU,TH;CHANG,FW
贡献者:	化學工程與材料工程學系
关键词:	N/A
日期:	1995
上传时间:	2010-06-29 17:33:05 (UTC+8)
出版者:	中央大學
摘要:	The carbothermal reduction and nitridation kinetics of silicon dioxide/carbon pellet were studied under conditions of various reaction parameters including gas now rate, pellet size, pellet-forming pressure, C/SiO2 molar ratio, grain sizes of both carbon and silicon dioxide, and reaction temperature by using a thermal gravimetric analysis (TGA) technique. The rate equation and kinetic model expressions of the nitridation process in the chemical reaction-controlled region were presented. The activation energy investigated in the temperature range between 1623 and 1748 K was 448 +/- 10 kJ/mol. The reaction-mechanism including the formation of a gaseous SiO intermediate was also discussed. The SiO formed from SiO2 being a rate-determining step was confirmed by experimental results. These theoretical developments correlated sufficiently with observed experimental results.
關聯:	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
显示于类别:	[化學工程與材料工程研究所] 期刊論文

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