Sintering and Electronic Conducting Properties of La0.8Ca0.2CrO3 Perovskite-Type Complex Oxides Synthesized by Different Methods
The sintering and electronic conducting properties of La0.8Ca0.2CrO3 synthesized by a glycine-nitrate process (GNP) were investigated in comparison with that synthesized by the conventional solid state reaction (SSR) method. The results demonstrate the advantage of the GNP method in producing La0.8Ca0.2CrO3 ceramic. Compared with the powder synthesized by the SSR method, that synthesized by the GNP method shows a higher sinterability due to its fine morphology. The relative densities of the ceramics made by the GNP and SSR methods attain 96.5 % and 96.0 % when sintering at 1450°C and 1550°C, respectively. In the case of similar relative densities, the ceramic made by the GNP method (sintered at 1450°C) exhibits superior electronic conducting properties to that made by the SSR method (sintered at 1550°C). This is attributed to a desired microstructure of the ceramic made by the GNP method.
T. Ohji, T. Sekino and K. Niihara
Q. Xu, W.F. Guo, W. Chen, H. Wang, D. P. Huang, B.T. Wang, "Sintering and Electronic Conducting Properties of La0.8Ca0.2CrO3 Perovskite-Type Complex Oxides Synthesized by Different Methods", Key Engineering Materials, Vols. 317-318, pp. 885-888, 2006