溶胶-凝胶法制备堇青石纳米粉体及表征  

Preparation of Cordierite Nano-particles by Sol-Gel Process and Characterization

作　　者：曹颖[1,2] 印万忠[1] 王国胜[2] 李伯深 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]沈阳化工大学化学工程学院,辽宁沈阳110142 [3]沈阳帕卡濑精有限总公司,辽宁沈阳110042

出　　处：《中国粉体技术》2012年第4期24-26,共3页China Powder Science and Technology

基　　金：国家自然科学基金项目;编号:51074037

摘　　要：以硝酸镁、硝酸铝和正硅酸乙酯为原料,按照堇青石化学计量配比,用溶胶-凝胶法配合回流制备堇青石粉体,通过差热分析、X射线衍射、扫描电镜等分析测试方法,对所制备粉体进行分析和表征。结果表明,在不添加任何助剂的情况下,可制得粒度均匀的堇青石粉体,平均粒径约为100 nm;压片后的坯样经1 056℃烧结,可获得以α-堇青石为主晶相的陶瓷材料,致密度为98.6%,且具有较低的介电常数和介电损耗(ε=3.94,tgδ=0.001 6,1 GHz),可用作高频片感介质材料。With a stoichiometric cordierite composition,using etraethytlorthosilicate,Mg（NO3）2·6H2O and Al（NO3）3·9H2O as raw materials,the cordierite nano-particles were prepared by sol-gel technique.The products were analyzed and characterized by DSC,XRD and SEM.The results show that the cordierite particles are prepared without additives after sintered at 700 ℃ for 2 h which have an average diameter of about 100 nm.Dense cordierite ceramics can be fabricated with the sample being sintered at 1 056 ℃ for 4 h.The sintered sample possesses excellent dielectric properties（ε=3.94,tg δ=0.001 6,1 GHz）,which is an ideal dielectric material for high frequency multi-layer chip inductors and other electronic components.

关 键 词：溶胶-凝胶法 堇青石 纳米粉体 

分 类 号：TQ170.6[化学工程—硅酸盐工业]