SnO_2掺杂ZnO-Nb_2O_5-TiO_2微波介质陶瓷  

Study on ZnO-Nb_2O_5-TiO_2 Microwave Dielectric Ceramics Doped with SnO2

作　　者：王焕平[1] 张启龙[1] 杨辉[1] 邹佳丽[1] 

机构地区：[1]浙江大学材料与化工学院,浙江杭州310027

出　　处：《电子元件与材料》2004年第7期4-6,共3页Electronic Components And Materials

基　　金：国家高技术研究发展计划(863 计划)项目(2003AA302760);浙江省科技计划项目(2003C31019)

摘　　要：研究了SnO2对ZnO-Nb2O5-TiO2陶瓷相结构和微波介电性能的影响.随Sn添加量的增加,晶相组成逐步从(Zn0.15Nb0.30Ti0.55)O2相转变为ZnTiNb2O8相,相对介电常数εr减少,τf向负频率温度系数方向移动, 当Sn含量增加到0.20,τf可降至9.8×10-6℃-1.当SnO2的摩尔比y为0～＜0.08时,形成完全固溶体,提高Q·f值;当y＞0.08,部分Sn形成第2相,降低其Q·f值.当y为0.08,在1 150℃烧结,具有很好的微波介电性能,其εr为50.3,Q·f为14 892 GHz,τf为25.12×10-6℃-1.Phase structure and microwave dielectric properties of ZnO-Nb_2O_5-TiO_2 ceramics doped with SnO_2 were investigated. When Sn increased, phase (Zn_(0.15)Nb_(0.30)Ti_(0.55))O2 transforms to phaseZnTiNb_2O_8, the relative dielectric constant (?r) decreased,and the temperature cofficient of resonant frequency (?f) moved to a negative direction. ?f decreased to 9.8×10–6 ℃–1 when y = 0.20. Sn4+ could substitute Ti4+ equivantly, formed solid solution completely ,and improved the Q·f value when y<0.08. However,Q·f decreased for part of Sn formed second phase when y>0.08. At y = 0.08,when sintered at 1 150℃, had good dielectric properties of ?r=50.3,Q·f = 14 892 GHz,and ?f= 25.12×10–6℃–1.

关 键 词：微波介质陶瓷 介电性能 二氧化锡 

分 类 号：TM28[一般工业技术—材料科学与工程] TQ174[电气工程—电工理论与新技术]