热处理天然金红石的微结构研究  

The micro-structure study of natural rutile modified by heat treatment

作　　者：庄伟[1] 罗泽敏[1] 刘迎新[1] 吴婧[1] 秦善[1] 鲁安怀[1] 

机构地区：[1]造山带与地壳演化教育部重点实验室,北京大学地质系,北京100871

出　　处：《岩石矿物学杂志》2009年第6期629-636,共8页Acta Petrologica et Mineralogica

基　　金：国家重点基础研究发展计划"973"资助项目(2007CB825602)

摘　　要：利用粉晶X射线衍射(XRD)、透射电镜(TEM)等分析手段对在氩气气氛中加热、退火的天然金红石样品的微结构进行了研究。研究表明样品在热处理后,晶格发生膨胀,并且在900℃和1000℃的样品中出现了钛铁矿物相。钛铁矿也是一种天然半导体矿物,沿与金红石(010)面网成大约31°夹角的方向生长,与金红石形成了二元复合半导体。紫外漫反射实验结果表明热处理后,金红石中出现的钛铁矿相有效地促进了光催化效果。The micro-structure of natural rutile heated and annealed under argon atmosphere was studied by means of X-ray Diffraction （XRD） and Transmission Electron Microscopy （TEM）. The results indicate that the lattice of heated rutile specimens was expanded,and ilmenite appeared when the heating temperature reached 900℃ and 1 000℃. Like rutile,ilmenite is a kind of natural semiconductor mineral. It grew in the direction at a 31°angle with rutile＇s （010） planes and formed dual coupled semiconductor with rutile. The results of the UV-vis test indicate that the appearance of ilmenite in the rutile sample can effectively enhance the photocatalytic activity of the specimens.

关 键 词：天然金红石 钛铁矿 微结构 热处理 二元复合半导体 光催化活性 

分 类 号：P578.47[天文地球—矿物学] P579[天文地球—地质学]