Bi_4Ge_3O_(12)晶体及其熔体结构的高温拉曼光谱研究  

High temperature Raman spectra and micro-structure of Bi_4Ge_3O_(12) crystal and its melt

作　　者：张霞[1] 万松明[1] 张庆礼[1] 殷绍唐[1] 尤静林[2] 陈辉[2] 王爱华[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,合肥230031 [2]上海市钢铁冶金新技术开发应用重点实验室,上海大学上海200072

出　　处：《物理学报》2007年第2期1152-1155,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50472104)资助的课题~~

摘　　要：研究了BGO晶体在不同温度下(在300—1323K的温度范围)的拉曼光谱及其熔体的高温拉曼光谱,分析了BGO晶体结构随温度变化的规律及BGO熔体的结构特征.随着温度的升高,BGO晶体的拉曼光谱谱峰都不同程度地向低波数方向移动,也存在不同程度的展宽,同时强度减弱.另外,在BGO熔体中存在[GeO4]和[BiO6]的结构基团;但两种结构之间的联键消失,即在熔体中二者是相互独立的生长基元.The High temperature Raman spectra of BGO crystal and melt were studied. The structures of BGO crystal and melt were analyzed. The rule of structure change of BGO crystal with increasing temperature was analyzed. The results show that the peaks of spectra move to the low wavelength and broaden in different degrees. The intensities of spectra peaks decrease, too. And there exit [ GeO4 ] and [ BiO6 ] bond structure in the melt of BGO crystal, while the bond between [ GeO4 ] and [ BiO6 ] bond structures disappear, so those two structures are unattached in the melt.

关 键 词：高温拉曼光谱 熔体 BGO晶体 

分 类 号：O734[理学—晶体学]