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首页> 外文期刊>European Journal of Glass Science and Technology, PartB. Physics and Chemistry of Glasses >Spectroscopic studies of the structure of Na_2O-CdO-PbO-P_2O_5 metaphosphate glasses
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Spectroscopic studies of the structure of Na_2O-CdO-PbO-P_2O_5 metaphosphate glasses

机译：Na_2O-CdO-PbO-P_2O_5偏磷酸盐玻璃的光谱学研究

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摘要

Density,modar volume,glass transition temperature,infrared spectroscopy and Raman spectroscopy measurements have been carried out for the glasses having mol% composition(40-z)Na_2O.10CdO.zPbO.50P_2O_5(O<=Z<=40).The density of these glasses was found to be in the range 2.79-4.58 g cm~-3.The molar volume decreases with increasing PbO concentration.Substitution of CdO and PbO for Na_2O increases T_g.FTIR spectroscopy reveals the formation of P-O-Cd and P-O-Pb bonds.The formation of P-O-Cd and P-O-Pb bonds,which replace P=O~-...Na~+ bonds while keeping the same fraction of P-O-P bonds,increases the crosslink density in the glass network and therefore increases the T_g of the glasses.The Raman results are in agreement with the FTIR analyses.A structural model for these glasses was suggested on the basis of infrared and Raman spectral investigations and by comparing with known metaphosphate glass structures.
机译：已对组成为mol％（40-z）Na_2O.10CdO.zPbO.50P_2O_5（O <= Z <= 40）的玻璃进行了密度，单位体积，玻璃化转变温度，红外光谱和拉曼光谱测量。这些玻璃的范围在2.79-4.58 g cm〜-3之间。摩尔体积随PbO浓度的增加而减小; CdO和PbO取代Na_2O会增加T_g.FTIR光谱显示PO-Cd和PO-的形成Pb键.PO-Cd和PO-Pb键的形成取代了P = O〜-... Na〜+键，同时保持POP键的比例相同，从而增加了玻璃网络中的交联密度，因此增加了玻璃的T_g。拉曼结果与FTIR分析相符。在红外和拉曼光谱研究的基础上，通过与已知的偏磷酸盐玻璃结构比较，提出了这种玻璃的结构模型。

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