Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 485, Issue -, Pages 24-33Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2018.01.024
Keywords
Spectroscopy; Thermal properties; Optical properties; Glass; Polaronic conduction
Funding
- CSIR, New Delhi (INDIA) [03(1377)/EMR-II/16]
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The current scientific investigation deals with some significant results pertaining to the effect of substituting lead oxide on properties of lithium borate glasses having composition xPbO center dot(30-x)Li2O center dot 70B(2)O(3) + 2 mol% MoO3 (x = 0, 2, 5, 7, 10, 12 and 15 mol%, PLBM1-7). These glasses have been synthesized through appropriate melt quench route and the non-crystalline phase formation has been confirmed through peak free X-ray diffraction measurements. Theoretical optical basicity (A(th)), density (p) and molar volume (17) are observed to increase with increase in PbO content. dc conductivity has been observed to exhibit mixed electronic-ionic behaviour. DTA has been carried out to determine glass transition (T-g), crystallization (T-x) and liquidus (T-1) temperature. FTIR spectra depicted that PbO is modifying the structure of lithium borate matrix. The optical absorption spectra reveals that optical band gap (Eopt) decreases with increasing contents of PbO at the cost of Li2O.
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