CaTiO_(3-)(La,Nd)AlO_3微波介质陶瓷的研究与应用  

Application and study of CaTiO_(3-)(La ,Nd)AlO)_3 microwave dielectric ceramics

作　　者：曹良足[1,2] 彭华仓[2] 严君美[2] 吴坚强[2] 

机构地区：[1]南京理工大学电光学院,江苏南京210094 [2]景德镇陶瓷学院,江西景德镇333001

出　　处：《电子元件与材料》2013年第8期35-37,41,共4页Electronic Components And Materials

基　　金：江西省科技支撑资助项目(No.20122BBE500035)

摘　　要：为了降低材料成本,研究了(1–x)CaTiO3–x(La1–yNdy)AlO3微波介质陶瓷的性能与组成之间的关系。采用固相法制备粉料,在1 400℃下烧结,用XRD和SEM分析陶瓷的晶相组成和显微结构,采用闭腔法测量其微波介电性能。研究结果表明该陶瓷形成单一晶相固溶体,当x=0.35,y=0.286时,εr=43,Q.f=30 000 GHz,τf=5×10–6/℃。用该陶瓷制作了基站用环形介质谐振器,其性能如下:f0=2.122 0 GHz,Q=12 436,fs/f0=1.220,与仿真结果非常吻合。In order to reduce cost,the relationships between properties and composition of（1–x）CaTiO3-x（La1–yNdy）AlO3 dielectric ceramic were studied.The ceramic powders were prepared using solid phase method,and sintered at 1 400 ℃,the crystal phase and microstructure of the prepared powders were analyzed by XRD and SEM,the microwave dielectric properties were measured with closed cavity method.The results indicate that the ceramic composite of（1–x）CaTiO3-x（La1–yNdy）AlO3contain a single crystal phase,when x = 0.35,y=0.286,εr =43,Q.f =30 000 GHZ,temperature coefficient of the resonant frequency is 5×10–6/℃.The ring resonator used in base-stations was made of the above ceramics.Results show that the properties of the resonator are below： f0=2.122 0 GHz,Q=12 436,fs/f0=1.220,which agree with the simulation.

关 键 词：微波介质陶瓷 CATIO3 NdAlO3 LAALO3 谐振器 仿真 

分 类 号：TB303[一般工业技术—材料科学与工程]