Thermophysical properties of SrHfO3 and SrRuO3
Thermophysical properties of SrHfO3 and SrRuO3
复制标题
DOI：
10.1016/j.jssc.2004.05.039
复制
发表时间：
2004-10
影响因子：
3.3
通讯作者：
S. Yamanaka;T. Maekawa;H. Muta;T. Matsuda;Shin-ichi Kobayashi;K. Kurosaki
中科院分区：
文献类型：
--
作者：
S. Yamanaka;T. Maekawa;H. Muta;T. Matsuda;Shin-ichi Kobayashi;K. Kurosaki
制备了锶系钙钛矿型氧化物SrHfO{sub 3}和SrRuO{sub 3}的多晶样品，并对其热物理性质进行了测定。在423 ~ 1073 K范围内，SrHfO{sub 3}的平均线性热膨胀系数为1.13x10{sup -5} K{sup -1}， SrRuO{sub 3}的平均线性热膨胀系数为1.03x10{sup -5} K{sup -1}。SrHfO{sub 3}和SrRuO{sub 3}的熔融温度T{sub m}分别为3200和2575 K。采用超声脉冲回波法测量了室温下空气中的纵向声速和剪切声速，从而计算了弹性模量和德拜温度。用差示扫描量热仪（DSC）在高纯氩气中测定了热容量。在真空条件下，用激光闪光法测量了热扩散系数。SrHfO{sub 3}和SrRuO{sub 3}在室温下的导热系数分别为5.20和5.97 W m{sup -1} K{sup -1}。
Polycrystalline samples of strontium series perovskite type oxides, SrHfO{sub 3} and SrRuO{sub 3} were prepared and the thermophysical properties were measured. The average linear thermal expansion coefficients are 1.13x10{sup -5} K{sup -1} for SrHfO{sub 3} and 1.03x10{sup -5} K{sup -1} for SrRuO{sub 3} in the temperature range between 423 and 1073 K. The melting temperatures T{sub m} of SrHfO{sub 3} and SrRuO{sub 3} are 3200 and 2575 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, DSC in high-purity argon atmosphere. The thermal diffusivity was measured by a laser flash method in vacuum. The thermal conductivities of SrHfO{sub 3} and SrRuO{sub 3} at room temperature are 5.20 and 5.97 W m{sup -1} K{sup -1}, respectively.