Synthesis and Electrical Properties of Perovskite-type Oxides Made by Glycine-Nitrate Process

Abstract

Abstract: La_0.6Sr_0.4Fe_0.8Co_0.2O₃ oxides powders of perovskite-type were synthesized by the low temperature
Glycine-Nitrate Process(GNP). The contributing factors to the crystal structure and morphology of synthesized powders were examined, and the desired synthesis
conditions were studied. The influences of sintering temperature on the electrical conductivities were studied, indicating that the sample sintered
at 1200℃ showed highest electrical conductivity. In the range of room temperature to 900℃, the electrical conductivities of the
samples sintered at different temperatures respectively increase with temperature to the maximums near 600℃ and then decrease. It was
verified that the hopping of small polaron is the dominating mechanism of the electrical conduction at low temperatures. The samples sintered at
different temperatures have similar activation energies of 0.103～0.122eV. Compared with the La_0.6Sr_0.4Fe_0.8Co_0.2O₃ synthesized
by the conventional solid state reaction method, those synthesized by GNP exhibit better sintering activity and electrical conductivities.

Key words: La_0.6Sr_0.4Fe_0.8Co_0.2O₃, perovskite-type oxides, glycine-nitrate process, electrical conductivity

CLC Number:

TQ174

HUANG Duan-Ping,XU Qing,CHEN Wen,WANG Hao,YUAN Run-Zhang. Synthesis and Electrical Properties of Perovskite-type Oxides Made by Glycine-Nitrate Process[J]. Journal of Inorganic Materials.

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Synthesis and Electrical Properties of Perovskite-type Oxides Made by Glycine-Nitrate Process

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