Thermal and mechanical properties of SrHfO3
Thermal and mechanical properties of SrHfO3
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DOI：
10.1016/j.jallcom.2004.03.113
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发表时间：
2004-11-03
影响因子：
6.2
通讯作者：
Kurosaki, K
中科院分区：
文献类型：
--
作者：
Yamanaka, S;Maekawa, T;Kurosaki, K
制备了锶钙钛矿型氧化物SrHfO3的多晶样品，并对其热性能和力学性能进行了测试。用x射线衍射法对晶体结构和晶格参数进行了表征。用差示扫描量热计（DSC）在高纯氩气中测量了热容量。在真空条件下，用激光闪光法测量了热扩散系数。热导率由热容量、热扩散系数和密度来评估。在氦气氛下，用高温x射线衍射在室温至约1000 K的温度范围内计算了热膨胀系数。熔点在还原气氛下用热阻法测定。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。硬度测量在室温下进行，在空气中，使用显微维氏硬度计。研究了钙钛矿型氧化物性能之间的关系。(C) 2004 Elsevier B.V.版权所有
Polycrystalline samples of the strontium perovskite type oxide, SrHfO3 have been prepared and the thermal and mechanical properties have been measured. The crystal structure and lattice parameters were evaluated by an X-ray diffraction method. The heat capacity was measured by using a differential scanning calorimeter, DSC, in a high purity argon atmosphere. The thermal diffusivity was measured by a laser flash method in vacuum. The thermal conductivity was evaluated from the heat capacity, thermal diffusivity, and density. The thermal expansion coefficient was evaluated by using high temperature X-ray diffraction in the temperature range from room temperature to about 1000 K under helium atmosphere. The melting point was measured by a thermal arrest method under a reduction atmosphere. 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 hardness measurements were performed at room temperature in air, using a micro-Vickers hardness tester. The relationships between the properties of the perovskite type oxide were studied. (C) 2004 Elsevier B.V. All rights reserved.