Thermal Expansion of LaCoO3
来源期刊：JOURNAL OF RARE EARTHS2004年第2期
论文作者：张家芸 闫柏军 刘建华
Key words：metal materials; thermal expansion; high-temperature X-ray diffraction; LaCoO3; rare earths;
Abstract: High-temperature X-ray diffraction(HTXRD)measurements of LaCoO3 powder was carried out in a temperature range from 298 to 1273 K.The experimental data obtained were adopted to evaluate the lattice parameters and cell volume.In this temperature range,the linear and volume expansion coefficients calculated using these cell parameters are 24.160～23.610×10-6·K-1 and 59.601～63.218×10-6·K-1 respectively.There is no discontinuity found in the cell parameters through the proposed first-order transition at 1210 K.
张家芸1，闫柏军1，刘建华1
(1.Department of Physical Chemistry,University of Science and Technology Beijing,Beijing 100083,China)
Abstract:High-temperature X-ray diffraction(HTXRD)measurements of LaCoO3 powder was carried out in a temperature range from 298 to 1273 K.The experimental data obtained were adopted to evaluate the lattice parameters and cell volume.In this temperature range,the linear and volume expansion coefficients calculated using these cell parameters are 24.160～23.610×10-6·K-1 and 59.601～63.218×10-6·K-1 respectively.There is no discontinuity found in the cell parameters through the proposed first-order transition at 1210 K.
Key words:metal materials; thermal expansion; high-temperature X-ray diffraction; LaCoO3; rare earths;
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