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Structural, thermal, dielectric and optical properties of $Li_2B_4O_7.SrBi_2Ta_2O_9$ glasses

Murugan, GS and Varma, KBR (2002) Structural, thermal, dielectric and optical properties of $Li_2B_4O_7.SrBi_2Ta_2O_9$ glasses. In: Physics and Chemistry of Glasses, 43 (1). pp. 47-51.

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Transparent glasses of various compositions in the system (100-x) $Li_2B_4O_7.xSrBi_2Ta_2O_9$ (0<or=x<or=22.5) were prepared via a melt quenching technique. The amorphous nature of all the compositions of the as-quenched glasses was confirmed by x-ray powder diffraction (XRD) studies. The glassy nature of the as-quenched glasses was established by differential thermal analysis (DTA). DTA data were used to determine the crystallisation, glass transition temperatures, glass formation parameter and thermal stability of the glasses. The dielectric constant as well as dielectric loss decrease with increase in frequency (100 Hz-10 MHz) at 300 K. The dielectric constant increases with increase in x while the dielectric loss decreases. The optical properties, namely transmission, optical band gap and Urbach energy of these transparent glasses have been found to be compositional dependent.

Item Type: Journal Article
Publication: Physics and Chemistry of Glasses
Publisher: Society of Glass Technology
Additional Information: Copyright of this article belongs to Society of Glass Technology.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 02 Jun 2006
Last Modified: 27 Aug 2008 12:09
URI: http://eprints.iisc.ac.in/id/eprint/7430

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