Thermal Stability of Complex Aluminates in the La2SrAl2O7–Ho2SrAl2O7 System
В. Ф. ПоповаGrebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, 199034, St. Petersburg, RussiaЕ. А. ТуговаIoffe Physicotechnical Institute, Russian Academy of Sciences, 194071, St. Petersburg, Russia
ABI
Аннотация
Continuous solid solutions of two-layer (La1 – xHox)2SrAl2O7 aluninates, which are Ruddlesden–Popper phases, have been found to exist in the La2SrAl2O7–Ho2SrAl2O7 system at temperatures above 1515°С. The (La1 – xHox)2SrAl2O7 complex aluminates crystallize in tetragonal crystal system (space group I4/mmm). A phase transformation scheme has been proposed for the La2SrAl2O7–Ho2SrAl2O7 system with the unlimited mutual solubility of the components at high temperatures and with a decomposition area below the critical temperature Тcr = 1515°С.
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