環境資源工学
Online ISSN : 1349-9262
Print ISSN : 1348-6012
ISSN-L : 1348-6012
論説報文
溶融鉛中の銅とイオウの相互溶解度
道本 龍彦大段 剛鈴木 直人市井 一男大石 敏雄
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キーワード: , , イオウ, 溶解度, 平衡, 熱力学
ジャーナル フリー

2007 年 54 巻 3 号 p. 139-144

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Equilibrium experiments were performed between molten lead and PbS-Cu2S mixed sulfide. The PbS-Cu2S system has an eutectic type phase diagram. Experimental temperatures were higher than the eutectic temperature in the range of 823 K to 1073 K. The compositions of PbS-Cu2S corresponded to the two phases of liquid mixed sulfide and solid PbS or liquid mixed sulfide and solid Cu2S at the experimental temperature. After cooling, a lead sample was analyzed for copper and sulfur.
A good linear relationship between logarithms of copper concentration and reciprocal values of the absolute temperatures was obtained. In the case of sulfur, the similar tendency was obtained.
The experimental values were compared with evaluated values calculated using the solubility of sulfur in the Pb-S binary system and the interaction parameter between copper and sulfur in liquid lead from the literature.
The standard Gibbs energy of the following reaction, 2Cu(% in Pb) + S(% in Pb) = Cu2S(s), was evaluated by using the experiment results.

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© 2007 環境資源工学会
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