B2O3|Na2O|V2O5玻璃紫外吸收截止波长和密度关系的研究

以硼酸、无水碳酸钠和五氧化二钒为原料,通过熔融-石墨模成形法制备(70-x)B₂O₃-30Na₂O-xV₂O₅三元硼酸盐玻璃,其中x=1 ％~10 %(摩尔分数)。经过研磨和抛光制成尺寸为30 mm×30 mm×2 mm的玻璃样品。采用阿基米德原理法测定样品的密度,采用紫外/可见分光光度计测定样品的吸收光谱。结果表明,玻璃的密度d与玻璃紫外吸收截止波长λ呈线性关系。当截止吸收波长小于或等于390 nm时,二者符合方程λ=2222.0d-4794.8;当截止吸收波长大于390 nm时,二者符合方程λ=1100.5d-2181.9。

Research on Relationship Between UV Cutoff Wavelength and Density of B2O3 - Na2O - V2O5 Glasses

Boric acid, anhydrous sodium carbonate and vanadium pentoxide were taken as start- ing materials, and ternary borate glasses（70 -x）B203 -30Na20 -xV205 were prepared by melting and forming in graphite model, where x = 1% - 10 mol%. Glass samples with size of 30 mm x 30 mm x 2 mm were obtained by grinding and polishing. The sample densities were meas- ured with Archimedes principle. UV absorbance spectra were determined by UV/Vis spectro- photometer. The linear relationship between the glass density d and UV absorbance cutoff wave- length k was shown： when λ≤390nm,λ = 2222.0 d -4794.8 ; when λ 〉390nm,λ = 1100.5 d -2181.9.