Phase relations in the system Al[sub 2]O[sub 3]-Ce[sub 2]Si[sub 2]O[sub 7] in the temperature range 900 to 1,925 C in inert atmosphere

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb03945.x· OSTI ID:6345394

Tas, A C; Akinc, M ^[1]

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1. Iowa State Univ., Ames (United States)

Equilibrium relationships in the system Al[sub 2]O[sub 3]-Ce[sub 2]Si[sub 2]O[sub 7] in inert atmosphere have been investigated in the temperature range 900 to 1,925 C. A simple eutectic reaction was found at 1,375 C and 51 mol% Ce[sub 2]Si[sub 2]O[sub 7]. A high-low polymorphic transformation in Ce[sub 2]Si[sub 2]O[sub 7] was observed at 1,274 C. New XRD patterns are suggested for both polymorphs of cerium pyrosilicate. The melting point of Ce[sub 2]Si[sub 2]O[sub 7] was found to be 1,788 C. A value for [Delta]H[sub m,Ce2Si2O7] of 36.81 kJ/mol was calculated from the initial slope of the experimentally determined liquidus in equilibrium with the pyrosilicate phase.

• OSTI ID: 6345394
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:6; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERIUM COMPOUNDS
CERIUM SILICATES
CHALCOGENIDES
COHERENT SCATTERING
DATA
DIFFRACTION
EQUILIBRIUM
EXPERIMENTAL DATA
INFORMATION
MELTING POINTS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SILICATES
SILICON COMPOUNDS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION