Abstract
The internal friction of x Na 2O·(0.5− x)V 2O 5·O.5P 2O 5( x = 0.025–0.3) glasses was studied using the low-frequency torsion pendulum technique. The temperature spectrum of internal friction reveals three maxima. Maximum 1, the so-called “electron” maximum, is the same as observed in binary vanadium-phosphate glasses. The origin of maximum 2 can be attributed to ion migration. Maximum 3 appears for glasses containing more than 10 mol.% Na 2O and is probably connected with sodium-proton interactions.
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