THE PHASE-RELATIONS IN THE IN2O3-GA2ZNO4-ZNO SYSTEM AT 1350-DEGREES-C

The phase relations in the In2O3Ga2ZnO4ZnO system at 1350°C are determined by a classical quenching method. In this system there exist an (InGaO3)2ZnO phase with Yb2Fe3O7-type structure and homologous phases with solid solution ranges In1.33Ga0.67O3(ZnO)InGaO3(ZnO)In0.92Ga1.08O3(ZnO), In1.68Ga0.32O3(ZnO)2InGaO3(ZnO)2In0.68Ga1.32O3(ZnO)2, In2O3(ZnO)3InGaO3(ZnO)3In0.54Ga1.46O3(ZnO)3, In2O3(ZnO)4InGaO3(ZnO)4In0.46Ga1.54O3(ZnO)4, In2O3(ZnO)5InGaO3(ZnO)5In1-xGa1+xO3(ZnO)5 (0.68 ≤ x ≤ 0.72), In2O3(ZnO)6InGaO3(ZnO)6In1-xGa1+xO3(ZnO)6 (0.68 ≤ x ≤ 0.79), In2O3(ZnO)7InGaO3(ZnO)7In1-xGa1+xO3(ZnO)7 (0.70 ≤ x ≤ 0.74), In2O3(ZnO)8InGaO3(ZnO)8In1-xGa1+xO3(ZnO)8 (0.60 ≤ x ≤ 0.68), In2O3(ZnO)9InGaO3(ZnO)9In1-xGa1+xO3(ZnO)9 (0.56 ≤ x ≤ 0.72), In2O3(ZnO)10InGaO3(ZnO)10In1-xGa1+xO3(ZnO)10 (0.47 ≤ x ≤ 0.67), In2O3(ZnO)11InGaO3(ZnO)11In1-xGa1+xO3(ZnO)11 (0.57 ≤ x ≤ 0.64), In2O3(ZnO)12InGaO3(ZnO)12In1-xGa1+xO3(ZnO)12 (x ≤ 0.64), and In2O3(ZnO)13InGaO3(ZnO)13In1-xGa1+xO3(ZnO)13 (0.49 ≤ x ≤ 0.75) in which InGaO3(ZnO)m (m = 1-13) is isostructural with InFeO3(ZnO)m. ZnO has a solid solution range, Zn1-xGa2xO1+2x (x = 0-0.094) to the direction of Ga2ZnO4, and Ga2ZnO4 has a solid solution range, Ga2-xInxZnO4 (x = 0-0.128(4)) to the direction of InGaO3(ZnO). A comparison between the phase relations in the In2O3Ga2ZnO4ZnO system and those in the In2O3Fe2ZnO4ZnO system is made, and the crystal chemical effects of Fe(III) and Ga(III) cations upon the phase relations in these systems are discussed. © 1991.