Structure characteristics and valence state study for La1-xNaxTiO3 synthesized under high-pressure and high-temperature conditions
Data(s) |
2000
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Resumo |
By using a novel high-pressure, high-temperature method, perovskite oxides of La1-xNaxTiO3 (x = 0.05, 0.1-0.8) with mixed valence state were synthesized. XRD analysis shows a cubic cell for the samples. Cell volumes of the samples with 0.1 less than or equal to x less than or equal to 0.5 decreases as x increases, and the cell Volume for x = 0.05 is smaller than that for x = 0.1. XPS of surface and EPR measurements indicate that Ti ions are of mixed valence of +3 and +4 and that A-cations vacancies exist in the samples. As x increases, the amount of Ti3+ ions decreases and the amount of A-cations vacancies increases. The valence state of Ti ions can be altered by changing both pressure and temperature. (C) 2000 Elsevier Science B.V. All rights reserved. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Miao JP;Li LP;Liu HJ;Xu DP;Lu Z;Song YB;Su WH;Zheng YG.Structure characteristics and valence state study for La1-xNaxTiO3 synthesized under high-pressure and high-temperature conditions,MATERIALS LETTERS,2000,42(1-2):1-6 |
Palavras-Chave | #ELECTRICAL-PROPERTIES |
Tipo |
期刊论文 |