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Glasses with general formula xNa 2 O-15V 2 O 5 -(85-x)B 2 O 3  where x is varied from 5 to 50 mol% in steps of 5 mol%, are fabricated using melt quenching technique. Ultrasound velocities, elastic moduli and Poisson’s ratio exhibit composition dependent trends. Both ultrasound velocities and elastic moduli increases with the addition of Na2O mol% whereas Poisson’s ratio decreases. The introduction of V 2 O 5  results in the formation of diboro-vanadate units similar to that of a diborate. Formation of these diboro-vanadate units leads to a monotonic increase in both sound velocities and elastic moduli.

Study on ultrasound velocities and elastic properties of sodium diboro-vanadate glasses