Fabrication of Sm2O3 Doped Glasses by Using Rice Husk Ash from Nakhon Pathom Province,           as a Silica Source

Nattapon Srisittipokakun* and Jakrapong kaewkhao

Abstract

Glasses were prepared by rice husk ash (denoted as RHA) from Nakhon Pathom province, Thailand. The chemical composition of the RHA was analyzed by the Energy Dispersive X-ray Fluorescence (EDXRF) spectrometer. The RHA was composed of 96% of SiO2, can be used instead of sand in the glass composition. The glasses doped with Sm2O3 and composition of (55-x) SiO2 : 20Na2O : 1Al2O3 : 13B2O3 : 6.3CaO : 0.2Sb2O3 : 4.5BaO : xSm2O3 (with 
x = 0.0, 0.5, 1.0, 1.5, 2.0, and 2.5 mol%). All oxides were analytical reagent grade with 99.9% purity, except SiO2 (obtained from RHA). The density, molar volume and refractive index of the glasses increase with the increasing concentration of Sm2O3. The color of the glasses was confirmed by a UV-Visible spectrophotometer in wavelength 200-1100 nm.

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