摘要
本工作研究了27BaO·5CaO·(64-x)B_2O_3·xTiO_2·1La_2O_3·3ZrO_2玻璃的一些物理性质、红外吸收和拉曼光谱.随 TiO_2含量增加,玻璃的密度、折射率、转变温度、软化温度和热膨胀系数也随之增加.讨论了(BO_4)、(BO_3)、(TiO_4)和(TiO_6)结构基团随玻璃成分变化的情况.在较高 TiO_2含量下(>30mol%),玻璃结构中以(TiO_2)四面体、(TiO_6)八面体和(BO_3)硼酸盐基团为主.钛离子既起网络形成体作用,又处于网络调整位.红外吸收光谱上位于950cm^(-1)处的振动峰可认为与(TiO_4)基团相关.
Some physical properties,infrared and Raman spectra were measured for the glasses withthe compositions(mol%):27BaO 5CaO (64-x)B_2O_3 xTiO_2 1La_2O_3 3ZrO_2(x=0～62).Increasing the TiO_2 content,it then increases the refractive index,density,transformation tem-perature,softening temperature,coefficient of thermal expansion of the glasses.The variationsof (SO_4),(BO_3),(TiO_4) and (TiO_6) structural units are discussed in relation to glass composi-tions.With higher TiO_2 contents(more than 30 mol%),(TiO_4) tetrahedra,(TiO_6) octahedraand (BO_3) borate groupings are dominant in the glass structure.Titanium ions act both asnetwork formers and network modifiers.The infrared absorption peak at 950 cm^(-1) associatedwith (TiO_4) tetrahedra was identified in the glasses.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第4期385-390,共6页
Journal of Inorganic Materials
关键词
钛酸盐玻璃
二氧化钛
光谱
Titanate glasses
Titanium dioxides
Property of glass
Infrared spectra
Glass structure
