X 10 X-ray Photoelectron Spectra and Electrical Properties of the K4.3V6O16.2 Polyvanadate / V. Bondarenka, V. L. Volkov, N. V. Podval'naya, S. Grebinskii, S. Mitskyavichyus, G. Tvardauskas // Inorganic Materials. - 2004. - Vol. 40, № 3. - P. 281-284 : il. - Bibliogr. : p. 284 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): РЕНТГЕНОВСКИЕ ФОТОЭЛЕКТРОННЫЕ СПЕКТРЫ -- СВОЙСТВА ЭЛЕКТРИЧЕСКИЕ -- ПОЛИВАНАДАТЫ КАЛИЯ Аннотация: The valence state of vanadium atoms in polycrystalline K4.3V6O16.2 is studied by x-ray photoelectron spectroscopy. By decomposing the V2p3/2 peak into Gaussian components, the relative amounts of V5+, V4+, and V3+ ions in the polyvanadate are evaluated before and after Ar+ ion milling. The top surface layer of vacuum-sintered K4.3V6O16.2 is shown to be enriched in potassium and oxygen ions. The 288-K dielectric permittivity, carrier mobility, and carrier concentration are determined by complex-impedance measurements Полный текст |