Реферат: Using termogravimetry with mass spectrum analysis, low and high temperature X-ray powder diffraction La1-xSrxFeO3-y solid solutions with perovskite-related structure were investigated. From -190 ℃ and up to room temperature under heating of samples in vacuum perovskite structure preserved. Oxygen loss under heating of samples (0<=x<=1) in air and in vacuum (x<0.75) under temperature of synthesis (1200℃) leaved the structure unaltered, however, resulted in increase of unit cell volume. Heating in vacuum of compositions x=> 0.75 resulted in vacancies-ordered phase formation. These structural changes (increase of unit cell parameter, oxygen vacancies ordering) are reversible and reoxidation leads to restoring of initial oxide parameters in process of cooling down in air or in a second heating in air of “vacuum-processed” samples. Loss of oxygen for initial samples under heating and reoxidation process for “vacuumprocessed” samples occurred at the same temperature about 400℃. Amount of emitted oxygen under heating in vacuum and in helium atmosphere increased as compared with those of realised under heating in air.

Библиографическая ссылка: Nadeev A.N. , Tsybulya S.V. , Yakovleva I.S. , Isupova L.A.
Mobile Oxygen Form and Structural Stability of La1-xSrxFeO3-y Perovskites
Acta Crystallographica Section A. 2008. V.64. P11.11.43 :1-1. DOI: 10.1107/S0108767308083293 WOS РИНЦ OpenAlex Sciact

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23 авг. 2008 г.

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Web of science:	WOS:000480420705066
РИНЦ:	29393751
OpenAlex:	W2323673055
Sciact:	21974

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OpenAlex	2

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