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Characteristics of Calcined Clay by Carburization Treatment
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 Title & Authors
Characteristics of Calcined Clay by Carburization Treatment
Kim, Sang-Myung; Kim, Ki-Ho;
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 Abstract
Traditionally and generally used calcined clay was carburized, and its characteristics were studied. Carburization treatment was performed by the thermally decomposed carbon and the deposit carbon which occur in a so called `Boudouard reaction at fuel combustion process in a closed-type furnace. The color of the carburized calcine clay changed from yellow to black, and the carbon component revealed as crystalline graphite by the X-ray diffraction test. The weight of the carburized calcine clay decreased to about 4 wt.% by the 1st heating to in air but it does not decreased by the 2nd heating of the same conditions. By the carburization treatment, the water absorption changed from 13 wt.% to 6 wt.%, and the contact angle for water drop changed, too, from 0 to which was tested by the photograph of one minute after a water drop contact. It means the carburized calcine clay does not absorb water drop so it has a hydrophobic characteristic.
 Keywords
Calcined clay;Carburization treatment;Crystalline graphite;Thermal analysis;Water absorption;Water contact angle;Hydrophobic;
 Language
Korean
 Cited by
1.
소성 점토의 침탄에 따른 동결융해 저항성 및 적외선 방사특성 연구,김기호;김상명;강병철;

한국세라믹학회지 , 2008. vol.45. 7, pp.387-394 crossref(new window)
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