By study the density, hardness, and measuring the absorbance, the study found that the glass with Bi2O3 to glass with transparent, yellow to brown, respectively. The density increases, and the maximum value.30 mol% then density tended to decrease. Mole volume is increased with increasing concentrations of Bi2O3 hardness no trends were between 300.1 to 341.3 and H.V absorbance of glass with Bi2O3 in wavelength 190-900 nm, it was found that the absorption edge position to the right. When the concentration of Bi2O3 increases.
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