Liquidus temperatures and phase equilibria in the BaCl^sub 2^-MCl-BaO systems

• Published in: Russian metallurgy Metally Vol. 2017; no. 2; p. 82
• Main Authors: Nikolaeva, E V, Bovet, A L, Korzun, I V
• Format: Journal Article
• Language: English
• Published: Moscow Springer Nature B.V 01-02-2017
• Subjects: Alkali metals; Barium; Chlorides; Crystallization; Diffraction; Diffraction patterns; Dissolution; Eutectic temperature; Liquidus; Melting; Melts; Phase equilibria; Systems analysis; Thermal analysis; X-ray diffraction; X-rays
• ISSN: 0036-0295; 1531-8648
• DOI: 10.1134/S0036029517020100

The liquidus temperatures of the BaO-BaCl2-MCl systems (with M = alkali metal) are determined by thermal analysis. The caloric effects observed during melting of the barium-containing chloride eutectic with barium oxide additions are studied. A chemical mechanism of barium oxide dissolution in the melts is confirmed. X-ray diffraction patterns taken for the melt solidified after experiment indicate the presence of barium oxychloride Ba4OCl6 in the solid phase. It is shown that the significant increase in the liquidus temperature in adding the barium oxide to barium-containing chloride molten mixtures is related to substantial changes in their composition and structure.