Volume : 2, Issue : 8, August - 2013

Elastic Properties of Copper Containing Bismuth Silicate Glasses – an Ultrasonic Study

P. Vasantharani, I. Sankeeda

Abstract :

Oxide glasses with the general formula Bi2 O3–(60–x)SiO2–xCuO with different compositions of copper (x = 5, 10, 15, 20 and 25 mol %) have been prepared by conventional melt– quenching technique. Both longitudinal and shear velocities were measured in different compositions of glass using pulse echo technique. Measurements were carried out at 5MHz frequency and room temperature. Elastic moduli and some other parameters such as, acoustic impedance, Debye temperature, softening temperature, microhardness, thermal expansion coefficient and poisson ratio have been calculated as a function of composition. Elastic moduli and all other parameters get decreased when CuO is substituted for SiO2 upto 10 mol% and above 10 mol% of CuO content, a reverse trend is followed, whereas poisson ratio shows opposite behaviour.