纳米二氧化硅粉体的微乳液制备及表征  

Preparation and characterization of nano-sized SiO_2 particles by microemulsion method

作　　者：骆锋[1] 阮建明[1] 万千[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《粉末冶金材料科学与工程》2004年第2期93-98,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家"863"高技术计划资助项目(2001AA218011)

摘　　要：以硅酸盐溶液／环已烷／聚乙二醇辛基苯基醚／正戊醇体系的微乳液反应为基础,以浓硫酸为 沉淀剂,采用微乳液法制备了高比表面积纳米SiO2粉体,并通过比表面积(BET),透射电镜 (TEM),红外光谱分析(IR),X射线衍射(XRD),差热一热重分析(DTA-TG)对样品进行了形态表 征和物相分析。研究结果表明:采用微乳液法制备的纳米SiO2粉末均由非晶态物质组成,粉体颗 粒形貌近似呈球形,粒径为15-35nm,比表面积达580-630 m2／g。High specific surface area nano-sized SiO2 particles were prepared by microemulsion reaction method using the microemulsion system of silicate solution, cyclohexane, OP-10, and n-pentanol, concentrated sulfuric acid was used into the microemulsion as precipitant. The powders were characterized with BET, TEM, IR, XRD and DTA-TG. The results show that amorphous nano-sized SiO2 powders can be obtained by means of microemulsion method, and the powders are approximately of spherical grains with size of 15-35 nm and the specific surface area of powder is up to 580-630 m2/g.

关 键 词：微乳液 SIO2 纳米粉末 高比表面积 

分 类 号：O648.23[理学—物理化学] TQL27.2[理学—化学]