稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2004年
2期
259-262
,共4页
闫柏军%张家芸%刘建华
閆柏軍%張傢蕓%劉建華
염백군%장가예%류건화
metal materials%thermal expansion%high-temperature X-ray diffraction%LaCoO3%rare earths
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.
