摘要
本文研究了Ｂｉ２Ｏ３、ＰｂＯ及Ｓｍ２Ｏ３对ＢａＯ－Ｎｄ２Ｏ３－ＴｉＯ２（简称ＢＮＴ）系陶瓷材料微波性能的影响。实验表明，在ＢＮＴ系材料中掺入Ｂｉ２Ｏ３或ＰｂＯ可降低材料的频率温度系数τｆ，但同时也使材料的ｔｇδ增大。采用Ｓｍ取代部分Ｎｄ，形成ＢａＯ－Ｎｄ２Ｏ３－Ｓｍ２Ｏ３－ＴｉＯ２（简称ＢＮＳＴ）四元系陶瓷材料，可有效降低材料的τｆ，改善频率温度稳定性，而不会降低材料的品质因素Ｑ０。当Ｓｍ２Ｏ３∶Ｎｄ２Ｏ３＝７∶３（ｍｏｌ比）时，可得到εｒ＝８０．８０，ｔｇδ＝２．９２×１０－４（２７ＧＨｚ测），τｆ＝２３．６３ｐｐｍ／℃的高性能ＢＮＳＴ四元系微波介质陶瓷材料。
The microwave properties of BaO-Nd2O3-TiO2 (BNT for short) ceramics doped with Bi2O3,PbO and Sm2O3 were investigated.It is found that despite the fact that the frequency temperature coefficient f of the mateial is decreased,the dielectric loss tg is increased when Bi2O3 or PbO is doped.However,when Nd in BNT ceramics is partly replaced by Sm to form BaO-Nd2O3-Sm2O3-TiO2(BNST for short) quadrisystem ceramics,not only the f of the material is decreased efficiently but also the quality factor Q0 remains very high.When Sm2O3Nd2O3=73(mol ratio),the BNST quadrisystem ceramics have the following properties:r=80.80,tg=2.9210-4(2.7GHz measured),f=23.63ppm/.
出处
《硅酸盐通报》
CAS
CSCD
1999年第2期48-51,共4页
Bulletin of the Chinese Ceramic Society
关键词
微波介质陶瓷
介质谐振器
钕钛钡
钐钛钡
陶瓷
microwave dielectric ceramics,dielectric resonator,barium neodymium titanium,barium samarium titanium
