Phase Relations In The Pseudo‐Ternary System La ₂ O ₃ –SrO–Fe ₂ O ₃

Abstract

The phase relations in the pseudo‐ternary system La 2 O 3 –SrO–Fe 2 O 3 have been investigated in air. Isothermal sections at 1100° and 1300°C are presented based on X‐ray diffraction and thermal analysis of annealed samples. Extended solid solubility was observed for the compounds Sr n +1− v La v Fe n O 3 n +1−δ ( n =1, 2, 3, and ∞) and Sr 1− x La x Fe 12 O 19 , while only limited solubility of La in Sr 4− z La z Fe 6 O 13±δ was observed. At high Fe 2 O 3 content, a liquid with low La 2 O 3 content was stable at 1300°C.