摘要
采用高温拉曼光谱技术 ,对CaO Al2 O3 SiO2 (简称CAS)三元系硅酸盐熔体试样从 2 5℃ (淬火玻璃相 )～ 170 0℃ (高温熔融相 )的分子网络分数维值进行了系统研究 ,首次获得了该熔体在升温和淬火过程中网络分数维值的变化规律 ,也即在纳米尺度上描述了熔体网络构象的蠕变特征。这对深入研究熔体的粘度、密度和表面张力等物化性质具有重要意义 ,也将为进一步探索地幔岩浆上升速率及其迁移演化规律 ,完善冶金炉渣构成机理和改进低维非晶态材料与高分子材料的制备工艺和性能提供新的重要信息和理论依据。
In this paper, the fractional dimension values of molecular network structure in the CaO-Al2O3-SiO2 silicate melts (being abbreviated CAS) from 25 degreesC (the quenching glass phases) up to 1 700 degreesC (the high temperature melts) have been investigated by using high temperature Raman spectroscopy. The quantitative measurement method of network fractional dimension value has been established using Raman spectrum, and the changing rules of fractional dimension values of the silicate melts during increasing temperature and quenching have been obtained. So the conformational wriggling characteristic of molecular network structure has been described for nanometer size. This has important significance for the research on the viscosity, density and surface tension of the melts, and provides important new information and theory for deliberating natural magmatic crystallization and evolution, and enhancing performance of low dimensional materials and organic materials.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期721-725,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金资助项目 (40 2 0 30 0 1 )
江苏省高校自然科学研究项目 (批准号 98KJB430 0 0 3)资助
关键词
硅酸盐熔体
分子网络
分数维值
高温拉曼光谱
silicate melts
molecular network
fractional dimension
high temperature Raman spectrum
