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Phase equilibria and stability of intermediate phases in the Sm2O3–BaO–Fe2O3 system
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2020-12-03 , DOI: 10.1111/jace.17602
Nadezhda E. Volkova 1 , Konstantin S. Tolstov 1, 2 , Ludmila Ya. Gavrilova 1 , Bernard Raveau 3 , Antoine Maignan 1, 3 , Vladimir A. Cherepanov 1
Affiliation  

Phase equilibria in the ½ Sm2O3–BaO–½ Fe2O3 system were systematically studied at 1100°C in air. Two individual compounds: Sm1.875Ba3.125Fe5O15‐δ and Ba3SmFe2O7.5+δ have been detected in the studied system at 1100°C in air. One more complex oxide with double perovskite structure SmBaFe2O5+w has been obtained under reduced oxygen partial pressure. Thermodynamic stability of SmBaFe2O5+w and its thermal stability in metastable state in air were determined. The subsolidus phase diagram for the ½ Sm2O3 – BaO – ½ Fe2O3 system at 1100°C in air has been constructed.

中文翻译:

Sm2O3–BaO–Fe2O3系统中的相平衡和中间相的稳定性

在1100°C的空气中系统地研究了½Sm 2 O 3 –BaO–½ Fe 2 O 3体系中的相平衡。两种单独的化合物:钐1.875的Ba 3.125的Fe 5 ö 15-δ和Ba 3以SmFe 2 ö 7.5 +δ已经在所研究的系统在1100检测℃的空气中。在降低的氧分压下,获得了一种具有双钙钛矿结构SmBaFe 2 O 5+ w的复合氧化物。SmBaFe 2 O 5+ w的热力学稳定性测定了其在空气中处于亚稳态时的热稳定性。绘制了在1100°C的空气中½Sm 2 O 3 – BaO –½Fe 2 O 3系统的亚固相图。
更新日期:2020-12-03
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