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Thermophysical Properties of Perovskite‐Type Strontium Cerate and Zirconate
Author(s) -
Yamanaka Shinsuke,
Kurosaki Ken,
Oyama Taku,
Muta Hiroaki,
Uno Masayoshi,
Matsuda Tetsushi,
Kobayashi ShinIchi
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00278.x
Subject(s) - materials science , thermal diffusivity , strontium , analytical chemistry (journal) , crystallite , thermal expansion , perovskite (structure) , atmospheric temperature range , zirconate , argon , heat capacity , mineralogy , thermodynamics , chemistry , composite material , ceramic , crystallography , metallurgy , titanate , physics , organic chemistry , chromatography
Polycrystalline samples of strontium series perovskite‐type oxides, SrCeO 3 and SrZrO 3 , were prepared and the thermophysical properties were measured. The chemical compositions of the samples do not deviate from the stoichiometric composition. The oxygen‐to‐metal (O/M) ratios of SrCeO 3 and SrZrO 3 are 3.00±0.03 and 2.98±0.01, respectively. The average linear thermal expansion coefficients are 1.11 × 10 −5 K −1 for SrCeO 3 and 9.69 × 10 −6 K −1 for SrZrO 3 in the temperature range between 300 and 1000 K. The melting temperatures T m of SrCeO 3 and SrZrO 3 are 2266 and 2883 K, respectively. The longitudinal and shear sound velocities were measured by an ultrasonic pulse–echo method at room temperature in air, which enables to evaluate the elastic moduli and Debye temperature. The heat capacity was measured by using a differential scanning calorimeter in high‐purity argon atmosphere. The thermal diffusivity was measured by a laser flash method in vacuum. The thermal conductivities of SrCeO 3 and SrZrO 3 at room temperature are 2.95 and 4.06 W·m −1 ·K −1 , respectively.