Abstract
Polycrystalline perovskite type oxides, BaZrO 3 and BaCeO 3, have been prepared by mixing the appropriate amounts of ZrO 2, CeO 2, and BaCO 3 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 BaZrO 3 and BaCeO 3 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 BaZrO 3 and BaCeO 3 show the typical characteristics of the perovskite type oxides.
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