著者

板垣 乙未生

出版者

社団法人 日本金属学会

雑誌

日本金属学会会報 (ISSN:00214426)

巻号頁・発行日

vol.32, no.4, pp.217, 1993-04-20 (Released:2011-08-10)

参考文献数

6

著者

板垣 乙未生 青木 豊松 Kimio Itagaki Toyomatsu Aoki

出版者

東北大学素材工学研究所

雑誌

東北大学素材工学研究所彙報 (ISSN:09194827)

巻号頁・発行日

vol.52, no.1, pp.1-8, 1996-12

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As a fundamental study of a new soldering system which avoids the use of a solder containing lead to protect the environment from the pollution, the heat content and the heat of eutectic reaction of the 63 mass% Sn-37 mass% Pb, 96.5Sn-3.5Ag, 42Sn-58Bi and 48Sn-52In eutectic alloys were determined in a range from 298K to the temperature which is about 30K above the eutectic point by using an adiabatic calorimeter. The obtained heat content, J_T=H_T-H_<298> (J/g), of the liquid alloys and heat of eutectic reaction, Δ_eH(J/g), are; 63Sn-37Pb : J_T=0.208T-10.0 Δ_eH=45.4 96.5Sn-3.5Ag : J_T=0.274T-27.5 Δ_eH=59.0 42Sn-58Bi : J_T=0.192T-8.0 Δ_eH=47.4 48Sn-52In : J_T=0.289T-57.1 Δ_eH=23.9

著者

板垣 乙未生 ROGHANI Ghasem FONT Jonkion M.

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan (ISSN:09161740)

巻号頁・発行日

vol.115, no.4, pp.203-211, 1999-04-25

被引用文献数

1

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For thermodynamically understanding copper or nickel smelting processes using oxygen or oxygen-enriched air as a blowing gas, a series of the authors' experimental studies of the phase equilibrium and distribution of minor elements between the copper matte or the nickel matte and the FeOX-SiO2 base slag under the SO2 partial pressures of 0.1, 0.5 and 1 atm at 1,300 °C are reviewed in this paper. The solubility of copper was found to be independent of pSO2 when the matte grade was specified and it was considered that this behavior was ascribable to the constancy of (pO2 /pS2 ) against pSO2 . On the other hand, it was clarified that the solubility of nickel in the slag increased with increasing pSO2 at a given matte grade. The difference in the dissolution behavior between copper and nickel was considered to be ascribable to the difference in the chemical formulas of the mono-metallic sulfides in which one copper atom combines with 1/2 sulfur atom while one nickel atom with 2/3 sulfur atom. When the distribution ratio of a minor element, X, between the slag and matte phases was defined as LXs/m = (mass % X in slag)/{mass % X in matte}, LXs/m for arsenic, antimony and bismuth at a given matte grade increased with increasing pSO2. This behavior was explained reasonabley by assuming a mutual reaction between a metallic species in the matte and an oxidic species in the slag. On the other hand, the distribution ratio of silver at a given matte grade was almost constant against pSO2. This was considered to be ascribed to the sulfidic species of AgS0.5 prevailing in the matte phase as well as the constancy of (pO2 /pS2 ) against pSO2.