E. Filipek

Unknown phase equilibria in the ternary oxide V2O5–CuO–In2O3 system in subsolidus area

The syntheses of two compounds Cu2In3VO9 and CuInVO5, forming in the ternary system V2O5–CuO–In2O3, are described. The compound CuInVO5 has been for the first time obtained as the pure phase. The temperatures and modes of melting of the compounds are determined, and their IR spectra are analysed. The phase diagram of V2O5–CuO–In2O3 system in subsolidus area is constructed by DTA and XRD methods. This system is shown to consist of 11 subsidiary subsystems in which three solid phases coexist at equilibrium. The melting temperatures of these subsystems are also determined.

Thermal stability of In2(MoO4)3 and phase equilibria in the MoO3–In2O3 system

Thermal stability of a compound forming in a binary system MoO3–In2O3 was investigated by DTA/TG, XRD and SEM methods in this study. For the first time, the diagram of phase equilibria established in the whole range of concentrations of this systems components has been constructed. The temperature and concentration ranges of the components of MoO3–In2O3 system in which the compound In2(MoO4)3 co-exists in solid state with MoO3 or In2O3 or with the liquid were determined. The composition and melting point of the eutectic mixture consisting of In2(MoO4)3 and MoO3 were found.

Synthesis and selected properties of a new solid solution in the Zn2FeV3O11–Mg2FeV3O11 system

The binary Zn2FeV3O11–Mg2FeV3O11 system has been studied by XRD, DTA, IR, and SEM methods. A new continuous substitution solid solution with the formula Zn2−xMgxFeV3O11 has been obtained by high-temperature synthesis. The DTA investigations were used to choose the heating temperatures as well as for determination of thermal stability of the new triclinic phase. The influence of the degree of Mg2+ ion incorporation on the unit cell volume as well as on the position of the IR absorption bands of the solid solution have been determined. The morphology of crystals of the new phase is presented.

Synthesis and selected properties of a new solid solution in the Zn 2 FeV 3 O 11 –Mg 2 FeV 3 O 11 system

The binary Zn2FeV3O11–Mg2FeV3O11 system has been studied by XRD, DTA, IR, and SEM methods. A new continuous substitution solid solution with the formula Zn2−xMgxFeV3O11 has been obtained by high-temperature synthesis. The DTA investigations were used to choose the heating temperatures as well as for determination of thermal stability of the new triclinic phase. The influence of the degree of Mg2+ ion incorporation on the unit cell volume as well as on the position of the IR absorption bands of the solid solution have been determined. The morphology of crystals of the new phase is presented.

Synthesis and selected properties of a new solid solution in the Zn2

The binary Zn2FeV3O11–Mg2FeV3O11 system has been studied by XRD, DTA, IR, and SEM methods. A new continuous substitution solid solution with the formula Zn2−xMgxFeV3O11 has been obtained by high-temperature synthesis. The DTA investigations were used to choose the heating temperatures as well as for determination of thermal stability of the new triclinic phase. The influence of the degree of Mg2+ ion incorporation on the unit cell volume as well as on the position of the IR absorption bands of the solid solution have been determined. The morphology of crystals of the new phase is presented.