Solubility of Platinum in Molten Fluxes as a Measure of Basicity

• Project/Area Number: 07650867
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Metal making engineering
• Research Institution: The University of Tokyo
• Principal Investigator: NAKAMURA Shigeko The University of Tokyo, Graduate School of Engineering, Lecturer, 大学院・工学系研究科, 講師 (40217849)
• Project Period (FY): 1995 – 1996
• Project Status: Completed (Fiscal Year 1996)
• Budget Amount: ¥2,100,000 (Direct Cost: ¥2,100,000); Fiscal Year 1996: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
• Keywords: Basicity / Slag / Molton Oxide / Platinum

Research Abstract

The solubility of platinum in the molten BaO-Al_2O_3, BaO-SiO_2, CaO-Al_2O_3, NaO_<0.5>-SiO_2, CaO-Al_2O_3-SiO_2, BaO-MuO_X, and BaO-CuO_X melts has been measured in order to seek a new measure of the basicity of highly basic fluxes containing transition metal ions.
The solubility of platinum increases with increasing the content of basic oxide. The correlations among the solubility of platinum, other refining indexes (such as carbonate, sulfide, and phosphate capacities), and basic oxide activity have been investigated. The solubility of platinum has a linear relationship with carbonate, sulfide, and phosphate capacities, and the basic oxide capacity in logarithmic form.
The ionic form of platinum in molten fluxes is suggested as PtO_2^<2-> by examining the dependence of the solubility of platinum on the oxygen partial pressure and on the relationship between the solubility of platinum and other refining indexes, such as carbonate, sulfide, and phosphate capacities.
The solubility of platinum may be a good indicator of the basicity of highly basic fluxes containing transition metal ions. The basicity of fluxes may be estimated by an easy method that a flux is fused in a platinum crucible.

Research Products

• [Publications] Shigeko Nakamura: "Solubility of platinim in Molten Flnxes as a Measure of Basicity" Metallurgical and Materials Transactions B. 28B,No.1. 103-108 (1997)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Shigeko Nakamura and Nobuo Sano :"Solubility of platinum in molten fluxes as a measure of basicity" Metallurgical and Materials Transactions B. 28B No.1. 103-108 (1997)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Shigeko Nakamura: "Solubility of Platinum in Molten Fluxes as a Measure of Basicity" Metallurgical and Materials Transactions B. 28B,No.1. 103-108 (1997)