| 254 | 7 | 7 |
| 下载次数 | 被引频次 | 阅读次数 |
研究了 SnO2对 ZnO-Nb_2O-5-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 ZnTiNb_2O8相,相对介电常数 ?r减少,?f向负频率温度系数方向移动, 当 Sn 含量增加到0.20,?f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 ?r为 50.3,Q·f 为 14 892GHz,?f为 25.12×10-6℃–1。
Abstract：Phase structure and microwave dielectric properties of ZnO-Nb_2O5-TiO2 ceramics doped with SnO2 were investigated. When Sn increased, phase (Zn0.15Nb0.30Ti0.55)O2 transforms to phaseZnTiNb_2O8, 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.
[1]LeeH J,HongK S,KimS J, et al.Dielectric properties ofMNb2O6 compounds(whereM =Ca,Mn,Co,Ni, orZn)[J].MaterResBull,1997,32(7):847–855.
[2]LeeH J,KimI T,HongK S.Dielectric properties ofAB2O6 compounds at microwave frequencies(A=Ca,Mg,Mn,Co,Ni,Zn,andB=Nb,Ta)[J].JpnJ ApplPhysPart2,1997,36:1318–1320.
[3]CohnS B.Microwave bandpass filters containing high-Q dielectric resonators[J].IEEE TransMicrowaveTheoryTech,1968,16:218–227.
[4]KimD W,KimD Y,HongK S.Phase relations and microwave dielectric properties ofZnNb2O6-TiO2[J].J MaterRes,2000,15(6):1331–1335.
[5]张启龙,杨辉,王家邦,等.低温烧结ZnNb2O6/TiO2复合陶瓷的制备及介电性能研究[J].材料科学与工程学报,2003,21(5):694–696.
基本信息:
中图分类号:TM28;TQ174
引用信息:
[1]王焕平,张启龙,杨辉,邹佳丽.SnO_2掺杂ZnO-Nb_2O_5-TiO_2微波介质陶瓷[J].电子元件与材料,2004(07):4-6.
基金信息:
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)
2004-07-30
2004-07-30