Optical properties of lithium borate glass (Li2O)x (B2O3)1-x

Halimah, M.K. and W.H., Chiew and Sidek, H.A.A. and Daud, W.M. and Wahab, Z.A. and Khamirul, A.M. and Iskandar, S.M. (2014) Optical properties of lithium borate glass (Li2O)x (B2O3)1-x. Sains Malaysiana, 43 (6). pp. 899-902. ISSN 0126-6039


Official URL: http://www.ukm.my/jsm/


A series of (Li2O)x(B2O3)1-x has been synthesized with mole fraction x=0.10, 0.15,0.20,0.25 and 0.30 mol% using melt quenching method. The structure of the glass system was determined by FTIR and X-ray diffraction. The density and molar volume were determined and the density increases with Li2O content whereas molar volume decreases with Li2O. Refractive index of glass samples were measured by ellipsometer. Refractive index increases with increase of Li2O. The absorption spectra of the studied glass showed that position of fundamental absorption edge shifts to longer wavelength with Li2O. Optical band gap varies from 0.10 to 2.22 eV and Urbach energy varies from 2.91 to 1.55 eV. The variation in optical band gap and Urbach energy were due to the variation in the glass structure.

Item Type:Article
Keywords:Borate glass; optical band gap; refractive index
Journal:Sains Malaysiana
ID Code:7179
Deposited By: ms aida -
Deposited On:19 Jun 2014 12:42
Last Modified:14 Dec 2016 06:43

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