文献类型：期刊文献

英文题名：Synthesis and crystal structure of La0.9Ca0.1Cr1-xNixO 3 (x = 0.0-1.0) and electric conductivity of La0.9Ca0.1Cr0.5Ni0.5O 3

作者：Zhang, G.J.[1]; Song, Y.W.[1]; Xiong, H.[1]; Zheng, J.Y.[1]; Jia, Y.Q.[1]

机构：[1] Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

年份：2002

卷号：73

期号：1

起止页码：101

外文期刊名：Materials Chemistry and Physics

收录：EI(收录号：2001506760370)

语种：英文

外文关键词：Crystal structure - Electric conductivity - Ionization - Phase transitions - Positive ions - Synthesis (chemical)

摘要：A series of compounds La0.9Ca0.1Cr1-xNixO 3 (x = 0.0-1.0) are synthesized by a wet chemical method. The crystal structure of La0.9Ca0.lCr1-xNixO 3 will become from an orthorhombic system (x 0.8). The calculation for the valence orbital ionization energy (VOIP) of 3d electron of the Cr3+ and Ni3+ ion indicates the possible presence of the Cr4+ ion in the compounds. The electric conductivity of the compound in air is measured over a temperature range from 293 to 1073 K. Arrhenius plot of ln(σT) versus 1/T for La0.9Ca0.lCr0.5Ni0.5O 3 is composed of two line segments. The discontinuity at 465 K in Arrhenius plot may indicate the occurrence of the phase transformation in the compound. The crystal structure of La0.9Ca0.lCrl-xNixO 3 will vary not only with the content of the nickel ion, but also with temperature. ? 2002 Elsevier Science B.V. All rights reserved.