摘要
采用传统陶瓷烧结方法,在空气气氛下烧结制得Ba(Mg,Nb)O3(BMN)陶瓷,并分析了烧结温度对体系相组成及相结构的影响。X射线衍射(XRD)研究表明,随着烧结时间的增加,体系中钙钛矿相也相应增加。红外(FTIR)研究研究表明结构无序的BMN钙钛矿相中部分的区域出现了结构有序现象。通过X射线光电子能谱(XPS)可以发现,随着烧结温度的增加,体系中Nb2O5进入Ba(Mg1/3,Nb2/3)O3晶格。微波介电性能表明,随着烧结温度的增加,Ba(Mg,Nb)O3的rε和Qf值有逐渐增加的趋势。
Relaxor-type ferroelectric perovskites attract a lot of attentions due to their excellent dielectric and microwave properties. Ba（Mg, Nb）O3 （BMN） ceramics have been synthesized from oxides by sintering in airs using a conventional mixed oxide process. From the study of XRD patterns, it is found that the amount of the perovskite phase increases with the increasing amount of La2O3. Furthermore, by the X-ray photoelectron spectroscopy （XPS） analyzation, it is discovered that the amount of Nb^4＋ is increased as La2O3 dopants increase from 0 to 0. 04.
出处
《信息记录材料》
2009年第4期18-21,共4页
Information Recording Materials
