超临界流体干燥法制备ZnS纳米粉体及其表征  

Preparation and Characteristics of ZnS Nano-powders by Supercritical Fluid Drying

作　　者：单民瑜[1] 陈卫星[1] 杨觉明[1] 

机构地区：[1]西安工业大学材料与化工学院,西安710032

出　　处：《西安工业大学学报》2008年第3期245-248,共4页Journal of Xi’an Technological University

摘　　要：采用微乳液法-超临界流体干燥法制备出ZnS纳米粉体．以无水乙醇为超临界干燥介质，超临界流体干燥工艺为260℃×7．3MPa×10min．采用X射线衍射（XRD）、透射电镜（TEM）对制得的粉体进行了表征．结果表明，制备得到的ZnS纳米粉具有闪锌矿晶体结构，粉体外形为球形，粒子大小均匀，粒径约为5～7nm，分散性较好，有效的改善了粉体的团聚程度．且晶化程度稍高于550℃煅烧处理的ZnS纳米粉．ZnS nano-powders were prepared by microemulsion-supercritical fluid drying method. Anhydrous alcohol was used as supercritical medium, and the process was as 260 ℃×7. 5 MPa×0. 5 h. The products were characterized through X-ray powder diffraction（XRD） and Transmission Electron Microscopy （TEM）. The XRD results showed that the nano-powders prepared by this method were ZnS with cubic structure. It was found that the nano-powders were spherical with the uniform size of 5-7 nm and superior dispersivity. The degree of aggregation of nano-powders was improved effectively and the crystallinity was better than that powders calcined at 550 ℃.

关 键 词：微乳液 超临界流体干燥 ZnS纳米粉体 煅烧 

分 类 号：TB383.1[一般工业技术—材料科学与工程]