傅里叶变换红外光谱
分析化学(期刊)
吸收边
材料科学
带隙
解聚
吸收光谱法
吸收(声学)
磷酸盐玻璃
光谱学
谱线
红外光谱学
吸收带
化学
光学
兴奋剂
物理
量子力学
复合材料
有机化学
光电子学
高分子化学
色谱法
天文
作者
Sonam Rani,Sujata Sanghi,Ashish Agarwal,V. P. Seth
标识
DOI:10.1016/j.saa.2009.07.023
摘要
Glasses having composition (25 + x)Li2O·(65 − x)P2O5·10Bi2O3 (0 ≤ x ≤ 25 mol%) were prepared by normal melt quenching technique. The optical absorption spectra of the polished samples were recorded in spectral range from 200 to 3300 nm at room temperature. The optical absorption edge (λcutoff), optical band gap (Eg) and Urbach energy (ΔE) were determined from the absorption spectra. Variation in these optical parameters has been associated with the structural changes occurring in these glasses with increase in Li2O:P2O5 ratio. Variation in density (D), molar volume (VM) and glass transition temperature (Tg) has also been correlated with structural changes in the glass samples. The FTIR spectra have been recorded in the spectral range from 400 to 1400 cm−1. The FTIR spectra show the rapid depolymerization of phosphate chains with increase in Li2O content and P–O–Bi bonds are formed.
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