2?SiO 2:TiO 2 glass ceramics embedded with Pb 2Ti 2O 6 cubic pyrochlore crystal phase: Part-II?piezo-optical acoustic and elastic properties]]>

摘要

AbstractComprehensive studies on piezo-optical (elasto optical) effects stimulated by bicolor coherent treatment using Er:glass laser, at λ?=?1540?nm and its second harmonic generation (λ?=?770?nm)insituwith mechanical stress, ultrasonic velocities and elastic coefficients of PbO?ZrO2?SiO2: TiO2glass ceramics were carried out as a function of concentration of crystallizing agent TiO2. The contribution to the piezo-optical effects is attributed to Pb2Ti2O6pyrochlore crystal phases appeared in the glasses during crystallization. The observed piezo-optical effects are attributed to simultaneous interference of the contributions due to the induced gratings (because of the bicolor treatment) and the piezo-optically originated birefringence. The variation of piezo optical coefficients, ultrasonic velocities and various elastic coefficients viz., Young's modulus, shear modulus, micro hardness etc., with the concentration of TiO2exhibited the maximal effect at 0.6?mol% content of TiO2. From the quantitative analysis these results together with the results of other studies (viz.,XRD, SEM, EPR, IR, optical absorption spectral studies), it is predicted that the PbO?ZrO2?SiO2glass crystallized with 0.6?mol% of TiO2is embedded with higher concentration of Pb2Ti2O6pyrochlore crystal phases (a crystal phase consisting of Ti4+ions) and such crystal phases are found to be responsible for observed maximal effects of all the mentioned properties for this sample.Graphical abstractDisplay OmittedHighlights?Laser induced piezooptical effects in PbO-ZrO2-SiO2:TiO2glass ceramics are studied.?Ultrasonic velocities and elastic coefficients are also investigated.?Coefficients are found to be maximal for samples crystallized with 0.6?mol% of TiO2.?Reasons for such maximal values are identified using spectroscopic studies.]]>