Carbothermal reduction of kaolinite under nitrogen atmosphere

Panda, PK and Mariappan, L and Kannan, TS (2000) Carbothermal reduction of kaolinite under nitrogen atmosphere. Ceramics International, 26 (5). pp. 455-461.

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Abstract

Preliminary studies on the carbothermal reduction of kaolinite (A1203.2SiO2.2H20) in a static nitrogen gas pressure of 0.15 MPa are reported. The effect of various reaction parameters, e.g. temperature of the reaction (1550-1700xB0;C), mole ratios of carbon to silica (4.5-9.0) in the reactant mixture and nature and source of carbon, e.g. activated charcoal (sp. surface area, 1000 m 2/gm) and13; carbon black (sp. surface area, 300 m 2/gm) on the carbothermal reduction have been investigated. It is observed that mullite, silicon oxy-nitride and X-sialon phases are present at low temperatures, while (3'-sialons, [3-SiC, A1 203 and A1N are present at high temperatures.13; Activated charcoal is more reactive than carbon black and the reaction rate is more for higher mole ratios of carbon.

Item Type:	Article
Additional Information:	copyright belongs to Elsevier
Uncontrolled Keywords:	Carbothermal reduction;Kaolinite;Nitrogen atmosphere
Subjects:	CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User:	Mr. N A
Date Deposited:	14 Jun 2006
Last Modified:	03 May 2012 06:08
URI:	http://nal-ir.nal.res.in/id/eprint/1438

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