Effect of the melt temperature on the solidification process of liquid garnets Ln[sub 3]Al[sub 5]O[sub 12] (Ln = Dy, Y, and Lu)
- Centre de Recherches sur la Physique des Hautes Temperatures, CNRS, 45071 Orleans (France)
This paper reports on the solidification process of liquid garnets Ln[sub 3]Al[sub 5]O[sub 12] (Ln = Dy, Y, Lu) that was probed by differential thermal analysis. A critical temperature T[sub clg] was evidence in the liquid. Cooling from temperatures under T[sub clg] leads to the crystallization of the single garnet phase. Cooling from temperatures above T[sub clg] leads to the solidification of a mixture of perovskite LnAlO[sub 3] and aluminum oxide [alpha]-Al[sub 2]O[sub 3]. For Ln = Y, the results are in agreement with stable and metastable phase diagrams previously proposed. The YAlO[sub 3] melt was shown to display a critical temperature T[sub clp] also. Its metastable solidification from temperatures above T[sub clp] leads to the formation of the perovskite at around 1550[degrees]C.
- OSTI ID:
- 6973208
- Journal Information:
- Journal of the American Ceramic Society; (United States), Vol. 75:11; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis and characterization of charge-substituted garnets YCaLnGa{sub 5}O{sub 12} (Ln = Ce,Pr,Tb)
Combustion synthesis and thermoluminescence in YAlO{sub 3}:Dy{sup 3+}
Related Subjects
ALUMINIUM OXIDES
THERMODYNAMIC PROPERTIES
DYSPROSIUM COMPLEXES
GARNETS
PHASE DIAGRAMS
SOLIDIFICATION
LUTETIUM COMPLEXES
YTTRIUM COMPLEXES
MELTING
METASTABLE STATES
PEROVSKITE
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COMPLEXES
DIAGRAMS
ENERGY LEVELS
EXCITED STATES
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
RARE EARTH COMPLEXES
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPLEXES
360204* - Ceramics
Cermets
& Refractories- Physical Properties
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies