Shantala D Patil
Articles written in Bulletin of Materials Science
Volume 30 Issue 2 April 2007 pp 89-92 Composites
Conducting polyaniline/cobaltous oxide composites have been synthesized using
Volume 31 Issue 4 August 2008 pp 631-634 Ceramics and Glasses
This paper describes the synthesis and spectroscopic studies of the glass system, 20Na2O–(20–𝑥) ZnO–𝑥ZnF2–60B2O3 (𝑥 = 0, 5, 10, 15, 20), prepared by melt quenching method. The analyses of DSC and XRD did not show the crystallinity of the glass sample. 11B MAS–NMR shows the presence of sharp peak around –14 ppm. From the IR studies, the broadening of the peak around 1200–1400 and 800–1100 cm-1 shows the presence of mixed linkages like B–O–B, B–O–Zn in the network.
Volume 32 Issue 6 December 2009 pp 597-601 Ceramics and Glasses
Elastic properties of Na2O–ZnO–ZnF2–B2O3 oxyfluoride glasses with different ZnF2 concentrations have been investigated using ultrasonic velocity measurements at room temperature, at a frequency of 10 MHz. Glasses prepared by melt quenching method were suitably polished for the ultrasonic velocity measurements using pulse-echo superposition method. Various elastic moduli have been calculated and their compositional dependence has been examined. The compositional dependence of elastic moduli with the concentration of ZnF2 shows decrease in the moduli initially, with further increase in ZnF2 the moduli sharply increases and then again tend to decrease when ZnF2 concentration is 20 mol%. The values of Poisson’s ratio lie in the range of 0.24–0.30, which is typical to covalent bonded network. The variation of 𝜃D with ZnF2 indicates complex behaviour of the glass network. The results have been analysed in view of the modified borate glass network. Addition of ZnF2 into the pure glass seems to influence the borate network by replacement of B–O–B linkages with B–O–Zn.
Volume 42 | Issue 6
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