Transactions of the INDIAN CERAMIC SOCIETY Vol. 68 2009
Development of Activated Alumina and its Effect on the Properties of Cement Free Castables Refractories
R. Roy, S. Ghosh and P. K. Das Poddar*
Pages : 31-34
DOI : 10.1080/0371750X.2009.11082159
Activated alumina is prepared by thermal dehydration (300o-600oC) of chemically pure aluminium hydroxide. The prepared materials have been characterized by residual water content, BET surface area and hydraulic activity. These aluminas are incorporated in cement free castable batch. Important properties like bulk density, apparent porosity, linear change, cold compressive strength, strength retainment after thermal shock have been studied. X-ray diffraction analysis has been performed to identify the phases formed while SEM studies have been used to get an idea about the microstructure of the castable matrix.