ZnO掺杂对0．7CaTiO_3-0．3NdAlO_3微波介质陶瓷低温烧结及介电性能的影响  

Effects of ZnO Additives on Sintering and Dielectric Properties of 0.7CaTiO_3-0.3NdAlO_3 Microwave Dielectric Ceramics

作　　者：赵文超[1] 甘国友[1] 严继康[1] 杜景红[1] 张家敏[1] 刘意春[1] 易健宏[1] 康昆勇[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,稀贵及有色金属先进材料教育部重点实验室,云南省新材料制备与加工重点实验室,昆明市稀贵及有色金属先进材料重点实验室,昆明650093

出　　处：《人工晶体学报》2015年第2期435-440,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51262017,51362017);云南省自然科学基金(2008ZC014M);昆明理工大学科学研究基金(2010-08);昆明理工大学分析测试基金(20130195,20140288)

摘　　要：采用固相法制备0.7CaTiO3-0.3NdAlO3微波介质陶瓷,研究添加不同含量纳米ZnO对其烧结特性和微波介电性能的影响。结果表明,掺入ZnO烧结温度降低了100℃,随着ZnO掺量增加,样品介电常数εr和谐振频率温度系数τf减小,品质因数(Q×f)先增大后减小。掺入1.5wt%的ZnO在1350℃烧结4 h时性能最佳:εr=36.50,Q×f=23785 GHz,τf=-2.47×10-6/℃。0.7CaTiO_3-0.3NdAlO_3 microwave dielectric ceramics doped with ZnO were prepared by solid- phase method. The sintering and microwave dielectric properties were studied. The results reveal that ZnO can effectively lower the sintering temperature about 100℃. The dielectric constant εr and the temperature coefficient of resonant frequency Tf decreases as ZnO doping content increasing, the quality factor （Q ×f） increases firstly then decreases as ZnO doping content increasing. Doped 1.5wt% ZnO and sintered at 1350 ℃ for 4 h has the optimum dielectric performance：εr =36.50,Q ×f=23785 GHz, Tf = - 2.47× 10 ^-6/℃.

关 键 词：0.7CaTiO_3-0.3NdAlO_3 氧化锌 微波介质陶瓷 介电性能 

分 类 号：TQ174[化学工程—陶瓷工业]