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Effect of Alumina Substitution on Porosity and Thermal Expansion of Triaxial Porcelain-Like Bodies
M. Ghaffari1, E. Salahi2, A. Rajabi2
1 Materials and Energy Research Center (MERC), P.O. Box 14155 – 4777, Karaj-Iran
2 Department of Mechanical and Material Engineering, Faculty of Engineering & Built Environment Universiti Kebangsaan Malaysia, 43600 Bangi, UKM, Malaysia
received June 5, 2014, received in revised form July 15, 2014, accepted August 21, 2014
Vol. 5, No. 4, Pages 287-292 DOI: 10.4416/JCST2014-00021
Abstract
Aluminous bodies are used in a wide variety of applications as a medium-strength ceramic. In this work, a full composition range of alumina, kaolin, and feldspar were fired at 1230 °C and 1400 °C, and were shown in a triaxial presentation, which can be used to make body calculations. Domestic kaolin has been studied for its potential as a raw material to produce aluminous bodies. The porosity and shrinkage of the samples were measured. When fired at 1400 °C, a wider composition range would result in porcelain-like bodies. The thermal expansion of the selected samples showed that the substitution of clay with alumina increased the thermal expansion coefficient. Firing at higher temperatures also affected thermal expansions in a similar manner.
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Keywords
Triaxial bodies, thermal expansion, porosity
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