溶銅中の鉛の活量におよぼす第3元素の影響
1974 年 90 巻 1031 号 p. 51-56
詳細
1974 年 90 巻 1031 号 p. 51-56
Activities of lead in liquid copper base alloys have been determined at 1, 130°C by measuring the relative vapor pressures of the melts with Knudsen effusion method.
The activity of lead in binary dilute solutions showed remarkable positive deviation from Raoult's law and obeyed Henry's law to at least 0.05 mole fraction of lead. The activity coefficient of lead in this composition range, γ°pb, was determined as 4.30 at 1, 130°C.
The effects of five additional solutes including silver, tin, gold, gallium, and indium on the activity of lead were investigated at the same temperature. The activity of lead increased by the addition of gallium, tin and indium, while it decreased by the addition of silver and gold.
The results expressed in terms of the first and second order interaction parameter are as follows:
X Ag Sn Au Ga In
ePb(X)-10.2+7.0-3.9+8.8+2.1
ePb(X·pb)+144-15-2-149+66
