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Defect Structure and Transport Properties of Nonstoichiometric Niobium Sulphide

机译:非化学计量硫化铌的缺陷结构和输运性质

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Defect and transport properties of nonstoichiometric niobium sulphide have been studied as a function of temperature (973-1273 K) and sulphur pressure (10~(-4)-10~4 Pa) using thermogravimetric and marker techniques. It has been shown that the cation sub-lattice of this sulphide is predominantly defected and in high sulphur pressure region cation vacancies and electron holes are the prevailing defects, while at low sulphur pressures interstitial cations and quasi-free electrons are considered predominate. Quantitative analysis of the results of niobium sulphidation kinetics was demonstrated together with chemical diffusion and nonstoichiometry as well as electrical conductivity and Seebeck effect data based on the idea that the proper formula of the discussed sulphide is Nb_(2+ -y)S_3 instead of Nb_(1-x)S_2.
机译:使用热重和标记技术研究了非化学计量的硫化铌的缺陷和输运性质随温度(973-1273 K)和硫压力(10〜(-4)-10〜4 Pa)的变化。已经表明,该硫化物的阳离子亚晶格主要缺陷,并且在高硫压力区域中,阳离子空位和电子空穴是主要缺陷,而在低硫压力下,间隙阳离子和准无电子被认为是主要缺陷。基于所讨论的硫化物的适当公式为Nb_(2+ -y)S_3而不是Nb_的想法,对铌硫化动力学结果的定量分析以及化学扩散和非化学计量以及电导率和塞贝克效应数据进行了论证。 (1-x)S_2。

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