Abstract
The surface tension of the molten system KF(1) + K2NbF7(2) + Nb2O5(3) up to x3 = 0.2 has been investigated using the maximum bubble pressure method over the temperature range from 1133 K to 1233 K. The uncertainty of the surface tension measurement was estimated to be ±1.5%. On the basis of the data presented, the composition dependence of the surface tension and the surface tension excess were calculated.
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