S 89 Structure and phase transitions of (La, Sr)(Ga, Mg)O3-alpha solid electrolyte [Text] / S. N. Shkerin, D. I. Bronin, S. A. Kovyazina, V. P. Gorelov, A. V. Kuzmin, Z. S. Martemyanova, S. M. Beresnev // Solid State Ionics. - 2004. - V. 171, N 1-2. - P129-134. - Bibliogr.: p. 133-134 (35 ref.) . - ISSN 0167-2738 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): La0.88Sr0.12Ga0.82Mg0.18O2.85 -- La -- Sr -- Ga -- LANTHANUM -- STRONTIUM -- GALLIUM -- LANTHANUM GALLATE -- LSGM -- SOLID ELECTROLYTES -- OXYGEN CONDUCTION -- PHASE TRANSITIONS Аннотация: Electrical conductivity, Raman scattering spectra, and thermal expansion of the solid solution based on lanthanum gallate having the formula La0.88Sr0.12Ga0.82Mg0.18O2.85 (LSGM12-18) were studied as a function of temperature. X-ray diffraction analysis of the samples at room temperature was performed. A dilatometric examination demonstrated that phase transitions of the second order took place at 775 plus-minus 10 and 880 plus-minus 20 K. The transition at 880 K was confirmed both by Raman scattering spectra and by a change in the activation energy of the electrical conductivity. This phase transition is probably due to a change of the oxygen sublattice symmetry |