ELECTRICAL-RESISTANCE AND DEFECT STRUCTURE OF STABLE AND METASTABLE PHASES OF THE SYSTEM NB12O29-NB2O5 BETWEEN 800-DEGREES-C AND 1100-DEGREES-C

被引：27

作者：

MARUCCO, JF

机构：

[1] Laboratoire des Composés Non-Stoechiométriques, Bâtiment 415, Université de Paris-Sud 91405, Orsay Cedex

来源：

JOURNAL OF CHEMICAL PHYSICS | 1979年 / 70卷 / 02期

关键词：

D O I：

10.1063/1.437545

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The defect structure of oxides of the system Nb12O 29-Nb2O5 have been studied by thermogravimetry and electrical resistance measurements. It has been clearly established that the stable oxides Nb2O5-x, Nb25O62-x, and Nb12O29-x are related to oxygen vacancies. On the other hand, the metastable phase of reduction of Nb2O5-x may be related to interstitial trivalent cations and it is suggested that such a defect of structure may be a step before the formation of crystallographic shear planes. In that case, the electric conductivity has been found to resemble a hopping process. © 1979 American Institute of Physics.

引用

页码：649 / 654

页数：6

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