The elastic properties of bismuth tellurite (85-XBi_2O_3 + 15TeO_2 + XPbO) glasseswith different compositions of lead (X=55 to 80 wt.% in steps of 2.5 wt.%) havebeen studied from 150 to 600 K. The precise transit time measurement has beenmade using a high power ultrasonic process control system with DSO employingcross correlation technique. The ultrasonic velocity and attenuation measurementshave been made using a transducer having resonating frequency of 5 MHz (bothlongitudinal and shear). The density, ultrasonic velocity and attenuation show aninteresting observation, which are used to explore the structural changes in thenetwork. Elastic moduli, Debye temperature and acoustic impedance of the glasseshave been determined using the experimental data. Anomalies observed in theelastic properties, Debye temperature and acoustic impedance exhibits similartrend of behaviour as that of density. The temperature dependence of the elasticproperties explores useful information about the structural stability andphysical properties of the bismuth tellurite glasses doped with lead. Theobserved results through ultrasonic non-destructive evaluation explore thestructural stability, structural changes and mechanical properties of theglasses.
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