Low‐temperature phase formation in the SrF2–LaF3 system

Low‐temperature phase formation in the SrF2–LaF3 system

Phase formation in the SrF2–LaF3 system was studied at temperatures ranging from 300°C to 450°C using nitrate flux. The solubility of LaF3 in SrF2 decreases with decreasing temperature. The equilibrium width of the solid solution region Sr1−xLaxF2+x at 400°C, it is 44.6 ± 0.4 mol% LaF3 (x = 0.446),...

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Veröffentlicht in:Journal of the American Ceramic Society 2021-06, Vol.104 (6), p.2836-2848
Hauptverfasser: Fedorov, Pavel P., Alexandrov, Alexander A., Voronov, Valery V., Mayakova, Mariya N., Baranchikov, Alexander E., Ivanov, Vladimir K.
Format: Artikel
Sprache:eng
Schlagworte:
diffuse phase transition
fluorite
heterovalent isomorphism
lanthanum fluoride
Lanthanum fluorides
Nernst theorem
phase diagram
Solid solutions
strontium fluoride
Strontium fluorides
tysonite
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Zusammenfassung:Phase formation in the SrF2–LaF3 system was studied at temperatures ranging from 300°C to 450°C using nitrate flux. The solubility of LaF3 in SrF2 decreases with decreasing temperature. The equilibrium width of the solid solution region Sr1−xLaxF2+x at 400°C, it is 44.6 ± 0.4 mol% LaF3 (x = 0.446), at 350°C — 38.3 ± 0.7 mol% LaF3 (x = 0.383), and decreases almost to zero at 300°C.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.17666