Reactions in the system HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in high HfO/sub 2/ or ZrO/sub 2/ regions
Journal Article
·
· Inorg. Mater. (Engl. Transl.); (United States)
OSTI ID:7192622
The objective of this work was to study phase equilibria in the systems HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in the 0 to 50 mole% SrO or BaO range and between 1600 and 2800/sup 0/C with the aid of high-temperature calcining and quenching methods. The samples' phase composition was determined by x-ray, microstructural, and petrographic methods. Samples calcined and melted in the solar furnace were analyzed by x-ray diffraction at room temperature on a DRON-1.5 diffractometer with Cu-K/sub ..cap alpha../ radiation and a Ni filter. Refractive indices were measured in high-refraction immersion liquids and in sulfur and selenium alloys. They form characteristic narrow solid solution regions based on the monoclinic, tetragonal, and cubic modifications of HfO/sub 2/(ZrO/sub 2/).
- OSTI ID:
- 7192622
- Journal Information:
- Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 23:9; ISSN INOMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCINATION
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DECOMPOSITION
DIAGRAMS
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
EQUILIBRIUM
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
HEATING
MELTING
MICROSTRUCTURE
MONOCLINIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE STUDIES
PHASE TRANSFORMATIONS
PYROLYSIS
QUANTITY RATIO
REFRACTORY METAL COMPOUNDS
SCATTERING
SOLAR HEATING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TETRAGONAL LATTICES
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCINATION
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DECOMPOSITION
DIAGRAMS
DIFFERENTIAL THERMAL ANALYSIS
DIFFRACTION
EQUILIBRIUM
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
HEATING
MELTING
MICROSTRUCTURE
MONOCLINIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE STUDIES
PHASE TRANSFORMATIONS
PYROLYSIS
QUANTITY RATIO
REFRACTORY METAL COMPOUNDS
SCATTERING
SOLAR HEATING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TETRAGONAL LATTICES
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES