E 70 Ermakova, L. V. Electrical Conductivity of Bi2O3-Tm2O3-Nb2O5 Solid Solutions / L. V. Ermakova, V. G. Bamburov // Inorganic Materials. - 2007. - Vol. 43, № 7. - P. 747-750 : il. - Bibliogr. : p. 750 (6 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЭЛЕКТРОПРОВОДНОСТЬ -- РАСТВОРЫ ТВЕРДЫЕ -- ОКСИД ВИСМУТА -- ТЕМПЕРАТУРЫ ВЫСОКИЕ Аннотация: New solid solutions, Bi2 –x–yTmxNbyO3 +δ, with tetragonal and cubic structures have been synthesized in the Bi2O3–Tm2O3–Nb2O5 system, and their electrical conductivity has been measured at temperatures from 670 to 1020 K. The 1020-K conductivity of the tetragonal solid solution Bi1.8Tm0.15Nb0.05O3 +δ is comparable to that of Bi1.75Tm0.25O3, the best conductor in the Bi2O3–Tm2O3 system Полный текст |
S 89 Structural transformations in a Bi2O3 crystal and in Bi2O3-based solid solutions in the temperature interval 25–750 C / L. V. Ermakova, V. N. Strekalovskii, E. G. Vovkotrub, V. G. Bamburov // Journal of Applied Spectroscopy. - 2002. - Vol. 69, № 1. - P152-154 : il. - Bibliogr. : p. 154 (6 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИД ВИСМУТА -- РАМАНОВСКАЯ СПЕКТРОСКОПИЯ -- ФАЗОВЫЙ ПЕРЕХОД Аннотация: The Raman scattering spectra of isostructural Bi2O3 and Bi1.8Tm0.2O3 in the course of heating have been investigated. It is shown that the sequences of structural changes with increase in temperature differ: α → δ and δ* → β → δ, respectively. In the high-temperature region, the structure takes the form of a disordered cube irrespective of the previous history of specimens Полный текст |