Thermophysical properties of BaZrO3 and BaCeO3

Polycrystalline perovskite type oxides, BaZrO3 and BaCeO3 have been prepared by mixing the appropriate amounts of ZrO2, CeO2, and BaCO3 followed by reacting at 1273 K and sintering at 1773 K. The thermophysical properties, viz. the thermal expansion coefficient, melting point, elastic moduli, Debye temperature, and Vickers hardness, of BaZrO3 and BaCeO3 have been measured. The harmonic and dilatational terms of the heat capacity have been evaluated by using the values of the thermal expansion coefficient, compressibility, and Debye temperature measured in the present study, The relationships between several properties of BaZrO3 and BaCeO3 show the typical characteristics of the perovskite type oxides. (C) 2003 Elsevier B.V. All rights reserved.