Surface Tension of KPO3-WO3 Melts
What is it about?
The temperatures Tliq of molten xWO3-(1−x)KPO3 mixtures with a molar content between x = 0 and x=0.60 have been determined by differential thermal analysis. The surface tension of the xWO3- (1−x)KPO3 melts in the interval from x = 0 to x = 0.5 has been measured by ring tensiometry for temperatures 10 K- 20 K above the melting points, up to 1373 K. The data obtained for KPO3 were fitted by a linear dependence on the temperature and compared with data available in the literature. The surface tension of the xWO3-(1−x)KPO3 melts was found to decrease non-monotonously with x. Three bends at x ~ 0.15, 0.30, and 0.45 were observed in the surface tension vs. molar fraction curve. The first and the third bends correspond to eutectic compositions; the second one is related to the formation of congruently melting K2WO2P2O7. Equations describing the temperature and concentration dependences of the surface tension are proposed.
The following have contributed to this page: DSc Vladyslav Lisnyak
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