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Phase Relationships in the Tricalcium Phosphate—Cerium Phosphate System. Thermal behavior of Phases Present in the System
Author(s) -
Matraszek Aleksandra,
Szczygiel Irena
Publication year - 2012
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.1551-2916.2012.05384.x
Subject(s) - cerium , scanning electron microscope , phase diagram , solid solution , phase (matter) , phosphate , thermal analysis , powder diffraction , chemistry , atmospheric temperature range , x ray crystallography , analytical chemistry (journal) , calcium , diffraction , materials science , nuclear chemistry , mineralogy , crystallography , thermal , inorganic chemistry , thermodynamics , chromatography , organic chemistry , physics , optics , composite material
A diagram representing the phase relationships in the Ca 3 ( PO 4 ) 2 – CePO 4 phosphate system has been developed on the basis of results obtained using thermal analysis ( DTA / DSC / TG ), X ‐ray diffraction ( XRD ), and scanning electron microscopy ( SEM / EDS ) methods. One intermediate compound with formula Ca 3 Ce ( PO 4 ) 3 occurs in the Ca 3 ( PO 4 ) 2 – CePO 4 system at temperature exceeding 1275°C. The compound melts at 1833°C and has one structural form. In the system a solid solution, having the structure of low‐temperature form of calcium phosphate Ca 3−3 x Ce x ( PO 4 ) 2− x (where x is a molar fraction of CePO 4 ), exists. The temperature and concentration range of the solid solution has been determined. It has been shown that the Ca 9 Ce ( PO 4 ) 7 phase should be understood as a limited solid solution with x = 0.25.