Glasses of the compositional series of 50PbO-yB(2)O(3)-(50-y)P2O5-xTiO(2) (with x=0-16) have been prepared and characterized by the determination of density, molar volume, glass transition temperature, dilatation softening temperature, thermal and chemical durability. Structural changes were evaluated from the studies by P-31 and B-11 MAS NMR, Raman and infrared spectroscopy. Molar volume of the glasses decreases and the glass transition temperature increases with increasing additions of TiO2. P-31 MAS NMR spectra revealed that titanate units enter phosphate chains decreasing the number of Q(2) units and increasing the number of Q(1) units. This result is confirmed by the observed changes in the Raman and infrared spectra of the TiO2-doped glasses. (C) 2003 Elsevier B.V. All rights reserved. [References: 10]
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机译：制备了组成系列为50PbO-yB（2）O（3）-（50-y）P2O5-xTiO（2）（x = 0-16）的玻璃，并通过测定密度，摩尔体积，玻璃化转变温度，膨胀软化温度，热和化学耐久性。通过P-31和B-11 MAS NMR，拉曼光谱和红外光谱研究对结构变化进行了评估。随着TiO 2的添加，玻璃的摩尔体积减小并且玻璃化转变温度升高。 P-31 MAS NMR光谱显示钛酸酯单元进入磷酸盐链，从而减少Q（2）单元的数量并增加Q（1）单元的数量。观察到的掺杂TiO 2的玻璃的拉曼光谱和红外光谱变化证实了这一结果。 （C）2003 Elsevier B.V.保留所有权利。 [参考：10]
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