The effect of different solid phases on the pyroplastic deformation of porcelain

A study on the effect of different minerals on the pyroplastic deformation of ceramic samples was carried out in a muffle furnace. For fair comparison, samples with same chemical composition were used. The mixtures with different minerals were pressed into rectangular bar and placed on alumina supports in the furnace. The green bodies were heated up to their desired temperature and stabilized for 2 h. The solid phases in the sample which were introduced by different raw materials were found to be responsible to the pyroplastic deformation. The influence of andalusite and fly ash powders on the pyroplastic deformation was strong but slight deformation was observed if kaolin clay and calcinated kaolin clay were employed separately. It suggests that the distribution of solid particles in glassy phase plays an important role in the extent of pyroplastic deformation of porcelain sample. (C)2015 The Ceramic Society of Japan. All rights reserved.