Solid State Science and Technology, Vol. 20, No 1 & 2 (2012) 121-127

ISSN 0128-7389





W. A. W. Razali 1,*, K. Azman1,b, H. J. M. Ridzwan 1, H. Azhan1, S.A. Senawi1,

M. R. Sahar2 and M. S. Rohani2


1Universiti Teknologi MARA Pahang, 26400 Bandar Jengka, Pahang, Malaysia

2UniversitiTeknologi Malaysia, 81310 UTM Skudai, Johor Bahru, Malaysia

*Corresponding author:



The effects of Li2O on the physical properties of mixed alkali tellurite glasses of the system Nd2O3-(10-x) PbO-xLi2O-89TeO2 such as refractive index and microhardness have been identified. The glass densities were varied from 5903.30 kg m-3 to 5710.43 kg m-3 with respect to mol % of Li2O. The decreasing trend in density implies that addition with atomic masses less than PbO tend to decrease the packing density of the glass structures since the atomic masses of Li2O and PbO are 29.88 and 223.19, respectively. However, the refractive indices and microhardness of the glass showed anomaly trend. From these results, other physical parameters such as reflection loss, molar refractivity, ionic concentration, electronic polarizability and inter-ionic separation have also been identified. The parameter non-linearly with respect to mol% of Li2O content.


Keywords: Li2O; tellurite glass; density; refractive index; microhardness; mixed alkali




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