期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 24, 期 1, 页码 129-137出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0955-2219(03)00123-7
关键词
functional applications; impedance; ionic conductivity; powders-chernical preparation; solubility limit; X-ray methods
The system (La1-xCax)(2)Mo2O9-delta was characterized in the region x = 0.01 less than or equal to x less than or equal to 0.15 by slow-scan powder X-ray diffraction measurements in order to determine the solubility limit of CaO. For the sake of comparison, the same was repeated for (La1-x M-x)(2)Mo2O9-delta where M = Sr2+ or Ba2+ and x = 0.05 and 0.10, respectively. In addition, the electrical conductivities of some of the typical compositions investigated in the present study were measured as a function of temperature by means of the ac impedance technique. The suppression of the phase transition in La2Mo2O9 by the alkaline-earth dopants was verified by differential thermal analysis of the samples. (C) 2003 Elsevier Ltd. All rights reserved.
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