摘要
采用铜蒸气脉冲激光光源和时间分辨探测技术,测定了CaSiO3晶体及其熔融态的常温及高温拉曼光谱(在298～2000K的温度范围),观察了其在高温下的相转变、升温过程及其熔体的特征光谱变化。通过谱图解析,研究分析了熔体微结构单元硅氧四面体Qn(n为单个硅氧四面体的桥氧数)分布。
CaSiO 3crystal and its melt from room temperature up to 2000 K are studied by high temperature Raman spectroscopy using pulsed copper vapor laser and time resolved detection technique. Temperature dependent characterisitic specta and phase transition are observed. Results shows that the number of bridging oxygen, which determines silicate polymerization, bonding to network former Si of the micro structure unit SiO 4 tetrahedra in melt is greatly different from that of solid crystal. It shows there exists several kinds of the micro structure unit containing different number of bridging oxygen in melt instead of mainly mono kind in crystal.
出处
《光散射学报》
1999年第4期378-381,共4页
The Journal of Light Scattering
基金
国家自然科学基金!资助项目 (No .5 9832 0 80和No .5 9874 0 1 6 )
上海市新材料研究中心资助项目!(No.98JC1 40 1 8)
关键词
拉曼光谱
熔体
CaSiO3
high temperature Raman spectroscopy
melt
CaSiO 3
