Changes in enthalpy and entropy during the melting of vanadium oxide bronzes of the type of. beta. -M/sub x/V/sub 2/O/sub 5/

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · Inorg. Mater. (Engl. Transl.); (United States)

OSTI ID:5894340

Volkov, V L; Bushmanov, V D

Changes in enthalpy and entropy are determined during the melting of vanadium oxide bronzes of the ..beta..-M/sub x/V/sub 2/O/sub 5/ type. The obtained data are considered in terms of the structural features of the phases. For Ag/sub 0.33/V/sub 2/O/sub 5/ a phase transformation is found at 803/sup 0/K with ..delta..H0/sub p.t/ = (1.2 +/- 0.1) kJ/mole and ..delta..S0/sub p.t/ = (1.5 +/- 0.1) J//sup 0/K mole, and high-temperature x-ray-diffraction investigations are conducted. The measured enthalpies during the oxidation melting of Na/sub 0.33/V/sub 2/O/sub 5/ and Ag/sub 0.33/V/sub 2/O/sub 5/ in air are equal to (61 +/- 5) and (59 +/- 5) kJ/mole respectively.

• OSTI ID: 5894340
• Journal Information: Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 23:1; ISSN INOMA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BRONZE
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALORIMETRY
CHALCOGENIDES
CHEMICAL ANALYSIS
COHERENT SCATTERING
COPPER ALLOYS
COPPER BASE ALLOYS
COPPER COMPOUNDS
COPPER OXIDES
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
ENTHALPY
ENTROPY
GRAVIMETRIC ANALYSIS
LATTICE PARAMETERS
LITHIUM COMPOUNDS
LITHIUM OXIDES
MELTING
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SILVER COMPOUNDS
SILVER OXIDES
SODIUM COMPOUNDS
SODIUM OXIDES
TEMPERATURE DEPENDENCE
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES
X-RAY DIFFRACTION