The System Alumina‐Gallia‐Water

Abstract
A study of the system Al2O3–Ga2O3–H2O has resulted in the determination of equilibrium diagrams for the systems Al2O3–Ga2O3 and Al2O3.‐H2O–Ga2O3.H2O. Extensive solid solution characterizes the α‐Al2O3 and β‐Ga2O3 structures at high temperatures, but it is shown that below 810°C. a compound, GaAlO3, and a new series of (Al, Ga)2O3 structures are stable. Among the hydrates, a complete series of diaspore solid solutions extends from Al2O3.H2O to Ga2O3.H2O. Boehmite solid solutions extend to approximately the composition 70Al2O3.H2O, 30Ga2O3.H2O.

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