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The phase relations in the In2O3A2O3BO systems at elevated temperatures [A: Fe or Ga, B: Cu or Co]

1984; Elsevier BV; Volume: 53; Issue: 2 Linguagem: Inglês

10.1016/0022-4596(84)90095-1

1095-726X

Noboru Kimizuka, Eiji Takayama,

ZnO doping and properties

The phase relations in the In2O3Fe2O3CuO system at 1000°C, the In2O3Ga2O3CuO system at 1000°C, the In2O3Fe2O3CoO system at 1300°C, and the In2O3Ga2O3CoO system at 1300°C were determined by means of a classical quenching method. InFeCuO4 (a = 3.3743(4) Å, c = 24.841(5) Å), InGaCuO4 (a = 3.3497(2) Å, c = 24.822(3) Å), and InGaCoO4 (a = 3.3091(2) Å, c = 25.859(4) Å) having the YbFe2O4 crystal structure, In2Fe2CuO7 (a = 3.3515(2) Å, c = 28.871(3) Å), In2Ga2CuO7 (a = 3.3319(1) Å, c = 28.697(2) Å), and In2FeGaCuO7 (a = 3.3421(2) Å, c = 28.817(3) Å) having the Yb2Fe3O7 crystal structure, and In3Fe3CuO10 (a = 3.3432(3) Å, c = 61.806(6) Å) having the Yb3Fe4O10 crystal structure were found as the stable ternary phases. There is a continuous series of solid solutions between InFeCoO4 and Fe2CoO4 which have the spinel structure at 1300°C. The crystal chemical roles of Fe3+ and Ga3+ in the present ternary systems were qualitatively compared.