V 86 Volkov, V. L. Electrical Conductivity of H2V12 – yWyO31 +delta· nH2O and HxVxW1 – xO3 · nH2O / V. L. Volkov, G. S. Zakharova // Inorganic Materials. - 2003. - Vol. 39, № 7. - P. 725-729 : il. - Bibliogr. : p. 729 (12 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЭЛЕКТРОПРОВОДНОСТЬ -- ЗОЛЬ-ГЕЛЬ МЕТОД -- ОКСИД ВАНАДИЯ -- ОКСИД ВОЛЬФРАМА -- ГИДРАТЫ Аннотация: The electrical conductivity of H2V12 - yWyO31 + delta · nH2O (0 <= y<=£ 3) and HxVxW1- xO3 · nH2O (x = 0, 0.08, 0.17, 0.25, 0.33) prepared by the sol–gel method was measured between 293 and 473 K at a relative humidity of 12%. Partial substitution of tungsten for vanadium or V5+ and H+ for tungsten was found to reduce the conductivity of the phases studied. The only exception is the x = 0.33 phase. Below 373 K, the activation energy of conduction is 0.22–0.29 eV in the amorphous phases (0 £ y £ 3; x = 0.25, 0.33) and 0.06–0.11 eV in the crystalline phases (x = 0, 0.08, 0.17). The possible mechanisms of electrical transport are discussed Полный текст |