state diagrams (T-x)
of the systems Ag2Te-ZnTe(I) and Ag2Te-Zn(II)
are offered on the ground of data obtained by differential thermal analysis,
X-ray phase analysis, microstructural analysis and measurements of the density
and the microhardness of samples synthesized. The systems studied are quasibinary
sections of the ternary system Ag-Zn-Te.
System I is characterized by two eutectic and three
eutectoidal non-variant equilibria as well as by an intermediate compound
Ag2ZnTe2, which melts congruently
at 880C. The latter exists in the range from 120 to 880C in two
polymorphic modifications (Tʅ→β=515C).
System II is characterized by one eutectic, two eutectoidal and one peritectic
nonvariant equilibria, boundary solid solutions on the ground of Ag2Te
and Zn and one intermediate phase of the composition Ag4Zn3Te2,
which melts congruently at 880C.
In the ternary system PbO−P2O5−PbCl2, the partial ternary system Pb5Cl2O4−Pb3Cl2O2−Pb10(PO4)6Cl2 was examined by thermal, microscopic, X-ray, dilatometric and IR absorption analyses and its phase diagram was provided.
Phase dependences in the binary system lead fluoride [PbF2]—cadmium fluoride [CdF2] were examined and the phase diagram of this system was established. The occurrence of solid continuous solutions with a
minimum melting point of 750C and a CdF2content of 35 mol% was confirmed. Thermal, dilatometric, microscopic and X-ray analytical methods were used during the investigations.
Phase dependencies in the ternary system Pb3Cl2O2−PbCl2−Pb10(PO4)6Cl2, which is a partial system of the ternary system PbO−P2O5−PbCl2, have been investigated by thermal, X-ray phase, microscopic, dilatometric and IR absorption analyses. The phase diagram
of the Pb3Cl2O2−PbCl2−Pb10(PO4)6Cl2 system has been provided. The components have been found not to form any new chemical compounds.
Reactivity of FeVO4 towards Ni2V2O7 and Ni3V2O8 in the solid state was investigated. On the base of XRD and DTA results, phase diagrams in subsolidus area of the FeVO4-Ni2V2O7 and FeVO4-Ni3V2O8 intersections of the ternary system NiO-V2O5-Fe2O3 have been worked out and the phase diagram of this ternary system in subsolidus area in the whole component concentration
range has been verified.
Authors:Jadwiga Walczak and Izabella Rychłowska-Himmel
Phase equlibria in the solid state in the system Fe2WO6−Fe8V10W16O85 were studied by means of X-ray phase powder diffraction and differential thermal analysis, This system is one of the intersections
of the three-component system Fe2O3−V2O5−WO3. The investigation demonstrated that the system is not a real two-component system even below the solidus line.
DTA and XRD methods were applied in studies on phase equilibria established in the system V9Mo6O40-AlVMoO7 up to 1000C over the whole component concentration range. The results were presented in the form of a phase diagram.
Authors:J. Walczak, J. Ziołkowski, M. Kurzawa, and L. Trzesniowska
Phase équilibria have been investigated in the FeVO4-Fe2(MoO4)3 system for the whole concentration range of the components. In this system there is one compound which melts incongruently: Fe4V2Mo3O20. The results are presented in the form of a phase diagram.