中温烧结0.6Mg_4Nb_2O_9-0.4SrTiO_3复相陶瓷  

The middle-temperature sintering of 0.6Mg_4Nb_2O_9-0.4SrTiO_3 composite ceramics

作　　者：裴翠锦[1] 姚国光[2] 田秀劳[2] 

机构地区：[1]运城学院应用化学系,山西运城044000 [2]西安邮电学院理学院,陕西西安710121

出　　处：《西安邮电学院学报》2010年第3期119-121,127,共4页Journal of Xi'an Institute of Posts and Telecommunications

基　　金：陕西省自然科学基金资助项目(2009JM601)

摘　　要：采用传统固态反应方法制备0.6Mg4Nb2O9-0.4SrTiO3复合陶瓷。研究LiF掺杂对其烧结特性、相结构和微观形貌的的影响。通过X射线衍射(XRD)和扫面电镜(SEM)观察样品的相组成和显微结构。实验结果表明:1.5 wt%LiF添加,可将Mg4Nb2O9/SrTiO3陶瓷的致密化烧结温度从1300℃降至1100℃;XRD表明除主相Mg4Nb2O9、SrTiO3外,还有少量新相Sr(Ti1-xNbx)O3+δ生成。The 0.6Mg4Nb2O9-0.4SrTiO3 composite ceramics was prepared by conventional solid-state reaction method.The effects of LiF addtion on the sintering behavior,phase compositions and microstructure of 0.6Mg4Nb2O9-0.4SrTiO3 specimen were studied.The samples were analyzed using X-ray diffraction and scanning electron microscopy techniques.The densification sintering temperature of 0.6Mg4Nb2O9＋0.4SrTiO3 is significantly lowed from 1300℃ to 1175℃ with 1.5 wt% LIF addtion.The main phases of Mg4Nb2O9 and SrTiO3 combined with small amount of Sr（Ti1-xNbx）O3＋δ were detected by XRD.

关 键 词：复合陶瓷 X射线衍射 扫描电镜 LiF掺杂 

分 类 号：TM534[电气工程—电器]