Phase Equilibria in the System La2O3‐P2O5
- 1 January 1984
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 67 (1) , 23-26
- https://doi.org/10.1111/j.1151-2916.1984.tb19140.x
Abstract
Subsolidus phase equilibria in the system La2O3‐P2O5 were established. The system contains six intermediate compounds having molar La2O3:P2O5 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.Keywords
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