THE INFLUENCE OF BASICITY ON THE SOLUBILITY OF PLATINUM IN OXIDE MELTS

Authors
NAKAMURA S IWASAWA K MORITA K SANO N
Citation
S. Nakamura et al., THE INFLUENCE OF BASICITY ON THE SOLUBILITY OF PLATINUM IN OXIDE MELTS, Metallurgical and materials transactions. B, Process metallurgy and materials processing science, 29(2), 1998, pp. 411-414
Citations number
6
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Metallurgical and materials transactions. B, Process metallurgy and materials processing science → ACNP
ISSN journal
10735615
Volume
29
Issue
2
Year of publication
1998
Pages
411 - 414
Database
ISI
SICI code
1073-5615(1998)29:2<411:TIOBOT>2.0.ZU;2-F
Abstract
The solubility of platinum in molten BaO-CuOx, BaO-MnOx, CaOsatd-SiO2- FeOx, KO0.5-SiO2, NaO0.5, SiO2, and NaO0.5-PO2.5 fluxes has been measu red in order to seek a measure of the basicity of highly basic fluxes containing transition metal ions and to clarify the chemical behavior of platinum in those melts. The solubility of platinum increases with increasing content of basic oxide in highly basic fluxes, suggesting t hat it may be a good indicator of the basicity of highly basic fluxes containing transition metal ions. The solubility of platinum in the KO 0.5-SiO2, NaO0.5-SiO2, and NaO0.5-PO2.5 melts has a minimum value, and it is suggested that a platinum is amphoteric: it exists as a platinu m cation in an acidic flux and does as a platinate ion in a basic flux .