Sintering behavior of Al2TiO5 base ceramics and their thermal properties

Sintering behavior of Al2TiO5 without and with various additives and the th ermal properties of the sintered material-thermal expansion and decompositi on-were investigated. The precursors of Al2TiO5 powders were prepared by ho mogeneous precipitation and coprecipitation. Sintering of pure Al2TiO5 gave a fine grained-structure at 1300 degrees C, but resulted in large-grained and cracked microstructures at 1400 and 1500 degrees C. Addition of ZrO2 or BaO gave fine-grained microstructures with a small increase in thermal exp ansion. Addition of ZrO2, BaO or ZrSiO4, especially ZrSiO4, was effective i n suppressing the thermal decomposition of Al2TiO5 at 1100 degrees C. (C) 1 999 Elsevier Science Ltd and Techna S.r.l. All rights reserved.