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Role of Er3+ and Bi3+ ions on thermal and optical properties of Li2B4O7 glasses: Structural correlation

Chandrashekaraiah, G and Reddy, N Sivasankara and Sujatha, B and Viswanatha, R and Reddy, C Narayana (2018) Role of Er3+ and Bi3+ ions on thermal and optical properties of Li2B4O7 glasses: Structural correlation. In: JOURNAL OF NON-CRYSTALLINE SOLIDS, 498 . pp. 252-261.

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Official URL: https://dx.doi.org/ 10.1016/j.jnoncrysol.2018.06.0...


Glasses with general formulae xBiCl(3)-(100-x)Li2B4O7 where 10 <= x <= 30 and x Er2O3-(10-x)BiCl3-90Li(2)B(4)O(7), where 0.1 <= x <= 0.5 mol% have been prepared to study the effect of Er2O3/BiCl3 on their physical, thermal and optical properties. Thermal stability parameter (Delta T) extracted from DSC thermograms reveals that the Delta T (> 100 degrees C) depends on Er2O3 content and the glasses are suitable for fiber drawing process. Optical properties of both the investigated glass systems exhibit composition dependent trends and the properties are critically dependent on polarizabilities and ionicity of the dopant ions. The variations observed in the physical properties of investigated glasses were correlated to the structural changes occur due to the addition of BiCl3/Er2O3. B-11 MAS NMR studies reveal the opening up of a tightly bound B4O7](2-) structural units with the formation of NBOs in the network. The variation of N-4 (fraction of 4-coordinated boron to the total boron content) with BiCl3/Er2O3 clearly indicates the presence of different proportion of 3- and 4-coordinated borons in the glass network.

Item Type: Journal Article
Additional Information: Copyright of this article belong to ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 20 Aug 2018 14:47
Last Modified: 20 Aug 2018 14:47
URI: http://eprints.iisc.ac.in/id/eprint/60460

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