溶融珪酸鉛の表面張力

抄録

The surface tension of molten lead silicates containing 0 to 60 mole % S_iO₂ was measured by a dipping cylinder method using an automatic balance. The surface tension increased with rising temperature and with decreasing PbO-content. On the curves showing the relationship between surface tension and composition of silicates, small discontinuities were observed at the compositions corresponding to 2P_bO·S_iO₂and P_bO·S_iO₂. It was found that the temperature coefficient of surface tension was about +0.02. Furthermore it should be noted that the surface tension at 100°, 200° and 300°C higher than liquidus temperature varied linearly with compositions and showed three straight lines intersection at the composition coresponding to about 25 and 50 mole % S_iO₂.