1987•Inorg. Mater. (Engl. Transl.); (United States)Requires access
Characteristics of the crystallization of CaLaAlO/sub 4/
B.Ya. Brach, Ekaterina Glazacheva, Nina A. Kostromina, R. M. Rakhmankulov, A. Yu. Romanov, Yu. P. Udalov
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Abstract
Analysis of the processes occurring at the crystal-melt phase interface showed that a diffusion layer enriched with calcium or lanthanum oxides forms at the crystallization front in the melt, as a result of the kinetic processes occurring in the adsorbed and diffusion layers. A computed diagram of the fusibility of the system CaO-La/sub 2/O/sub 3/-Al/sub 2/O/sub 3/ was constructed based on the model of regular and ideal solutions. Comparison of the fusibility diagrams and the limiting deviations from stoichiometry of CaLaAlO/sub 4/ on the crystallization front of this compound shows that they correspond to the eutectic line bounding its primary crystallization field.