Preparation of a continuous series of solid solutions in the Ta/sub 2/O/sub 5/--Nb/sub 2/O/sub 5/ system
Journal Article
·
· J. Solid State Chem.; (United States)
- Soreq Nuclear Research Centre, Yavne, Israel
A continuous series of Ta/sub 2/O/sub 5/--Nb/sub 2/O/sub 5/ solid solutions was obtained by anodically dissolving calculated amounts of tantalum and niobium in a saturated solution of NH/sub 4/Cl in methanol (at room temperature), evaporation of the solvent, and thermal decomposition of the product at temperatures not exceeding 750 to 800/sup 0/C. X-ray diffraction analysis showed that at all Ta:Nb ratios the product was isomorphic with ..beta..-Ta/sub 2/O/sub 5/ (..gamma..-Nb/sub 2/O/sub 5/); all reflections could be indexed in an orthorhombic cell, with a increasing linearly from 6.170 to 6.192 A and c decreasing linearly from 3.935 to 3.885 A as Ta was substituted for Nb. The changes in parameter b as a function of composition were less pronounced and its values were between 3.657 and 3.662 A. The method may be used for the preparation of various mixed oxides that are difficult to prepare by other techniques.
- OSTI ID:
- 7142768
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 18:4; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
BINARY MIXTURES
CHALCOGENIDES
CHEMICAL PREPARATION
DISPERSIONS
LATTICE PARAMETERS
MIXTURES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
SOLID SOLUTIONS
SOLUTIONS
SYNTHESIS
TANTALUM COMPOUNDS
TANTALUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
BINARY MIXTURES
CHALCOGENIDES
CHEMICAL PREPARATION
DISPERSIONS
LATTICE PARAMETERS
MIXTURES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
SOLID SOLUTIONS
SOLUTIONS
SYNTHESIS
TANTALUM COMPOUNDS
TANTALUM OXIDES
TRANSITION ELEMENT COMPOUNDS