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Isothermal equation of state for the skutterudites CoSb3 and LaFe3CoSb12

机译:方钴矿CoSb3和LaFe3CoSb12的等温状态方程

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The thermoelectric materials CoSb3 and LaFe3CoSb12 with skutterudite structure were subjected to high pressures using a diamond anvil high-pressure cell up to 20 GPa. Energy-dispersive X-ray diffraction was used to determine the dependence of the lattice parameter on pressure. No major change in the X-ray diffraction spectra was observed for both compounds. constituting evidence that both compounds are stable within this pressure range, despite their relatively open structures. Three distinct isothermal equations of state for solids under high pressure were fitted to the experimental data to determine the bulk modulus for both compounds. The filled skutterudite showed a greater compressibility than the unfilled one. this difference can be understood in terms of the larger lattice parameter of the former. (C) 2004 Elsevier Ltd. All rights reserved.
机译:使用高达20 GPa的金刚石砧高压电池对具有方钴矿结构的热电材料CoSb3和LaFe3CoSb12进行高压。使用能量色散X射线衍射确定晶格参数对压力的依赖性。两种化合物在X射线衍射谱图中均未观察到重大变化。构成证据表明,尽管它们的结构相对开放,但两种化合物在此压力范围内都是稳定的。将固体在高压下的三个不同的等温状态方程式拟合到实验数据,以确定这两种化合物的体积模量。填充的方钴矿显示出比未填充的方钴矿更大的可压缩性。从前者的较大晶格参数可以理解这种差异。 (C)2004 Elsevier Ltd.保留所有权利。

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