摘要
本文测定了xCaSiO3 ·LiBO2 (重量比 ,x =0 ,0 2 5 ,0 33,0 5 0 )系列的拉曼光谱 ,分析了硅氧四面体的微结构形态及其随SiO2 浓度的变化。结果表明 ,在所研究的浓度范围内 ,其微结构单元 ,即Qi(i =0 ~4)均以孤立的硅氧四面体存在 ,且随SiO2 浓度的增加 ,Q2 ,Q4 的丰度有明显增加 ;此外 ,硅氧四面体的伸缩振动谱峰的积分强度总和与SiO2 浓度呈线性相关 ,为采用拉曼光谱直接分析矿物、炉渣、玻璃和土壤中的SiO2
Raman spectra of xCaSiO 3·LiBO 2 (by weight ratio, x = 0, 0.25, 0.33, 0.50)crystals were measured. The microstructure of different silicon-oxygen tetrahedrons and their abundant variations with silica contents were studied. It shows that all the silicon-oxygen tetrahedrons are isolated by Si-O b-B bondings or free SiO 4- 4.No evidence suggests that there exist consiclerable Si-O b-Si bondings. The abundance of Q 2, Q 4 species increases with the increasing silica content, there exists barely Q 3 species even at high silica content. And the sum of integrated Raman peaks for all Q i species are linearly correlated with silica concentration in crystal, which offers the possibility to analysis silica in minerals, slags, glasses and soil samples directly.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2002年第5期787-789,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金资助项目 (No 597740 2 9
No 59832 0 80和No 598740 1 6)
上海市新材料研究中心资助项目 (No 98JC1 4 0 1 8)
上海市教委资助项目