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

Nattapon Srisittipokakun* and Jakrapong kaewkhao


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.