Ultrasonic characterisation of ferroelectric BaTiO3 doped lead bismuth oxide semiconducting glasses

Physicochemical studies of phosphate based P2O5–Na2O–CaO–TiO2 glasses for biomedical applications

“…Precise transit time measurements were carried out by cross-correlation technique described elsewhere [15]. The precise ultrasonic velocities (U L and U S ) in each glasses were obtained by measuring the precise transit time (t) using the relation [20] …”

Temperature and Composition Dependence of the Elastic Properties of Semiconducting (100 -x)V2O5-xPbO Oxide Glasses

“…Attempts [5,13] have been made to explain the linear dependence of the elastic properties and related parameters on the composition or temperature, by changes in the structure of the glasses. Similarly, the observed anomalies [11,14,15] in the elastic properties as a function of temperature and composition have been interpreted in terms of a structural softening or transformation of cross-linkages in the glass structure.…”

“…The non-aqueous lubricants grease/honey (low temperature) and machine oil (high temperature) have been used as a couplant between the glass sample and the transducer. The precise transit time was measured using cross correlation technique employing various steps as described elsewhere [11] to get an overall accuracy in transit time of AE 0.2 ns. Knowing the sample thickness in micron resolution and the transit time in nanosecond resolution, ultrasonic velocities were obtained for each glass sample.…”

“…Therefore, vanadate glasses containing lead are quite interesting. The structure and the conduction mechanisms [10][11][12] in V 2 O 5 -PbO glasses have been revealed for different PbO contents. Even though the structure, stability, and the properties of V 2 O 5 -PbO glasses have been studied [10][11][12] over a wide range of temperatures, the elastic properties, structure and stability of the glasses as a function of temperature from liquid nitrogen to 480 K are still not well known.…”

Synthesis and on-line ultrasonic characterisation of bulk and nanocrystalline La0.68Sr0.32MnO3 perovskite manganite

“…Even though different techniques are available, on-line ultrasonic studies is a unique and impor- tant tool used to explore the structural and phase transitions in perovskite magnetite materials. This is possibly due to the interactions of ultrasonic waves with the macroscopic, microscopic and submicroscopic particles [22][23][24] in the perovskite materials.…”