Premium
Phase Equilibria in the System La 2 O 3 ‐P 2 O 5
Author(s) -
PARK HEE DONG,
KREIDLER ERIC R.
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb19140.x
Subject(s) - phase (matter) , lanthanum , chemistry , phase diagram , mineralogy , crystallography , thermodynamics , inorganic chemistry , organic chemistry , physics
Subsolidus phase equilibria in the system La 2 O 3 ‐P 2 O 5 were established. The system contains six intermediate compounds having molar La 2 O 3 :P 2 O 5 ratios of 3:1,7:3,1:1,1:2,1:3, and 1:5. It was found that the 3:1 compound has a phase transformation at 935°C. The 1:2 compound decomposes to a mixture of 1:1 and 1:3 at 755°C. The 1:3 compound melts incongruently to 1:1 and liquid at 1235°C and the 1:5 compound melts congruently at 1095°C. None of the lanthanum phosphates have lower temperature limits of stability.