MICROWAVE DIELECTRIC-PROPERTIES OF CAO-LI-2O-LN2O3-TIO2 CERAMICS

被引：89
|
作者：
EZAKI, K
BABA, Y
TAKAHASHI, H
SHIBATA, K
NAKANO, S
机构：
[1] Functional Materials Research Center, SANYO Electric Co. Ltd, Hirakata, Osaka, 573
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 1993年 / 32卷 / 9B期
关键词：
DIELECTRIC CERAMIC; DIELECTRIC CONSTANT; Q-VALUE; PEROVSKITE; LANTHANIDE ELEMENT; BAND PASS FILTER;
D O I：
10.1143/JJAP.32.4319
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated the microwave dielectric properties of the Li2O-Ln2O3-TiO2 system and the CaO-Li2O-Ln2O3-TiO2 system (Ln: Lanthanide), both of which have a perovskite structure. The relationship between the kind of lanthanide element and dielectric properties at microwave frequencies was confirmed. It was also found that the ionic radius of lanthanide ions has a strong influence on the dielectric properties. Excellent dielectric properties Of epsilon(r)=110, f.Q value=4500 GHz and high temperature stability for the resonant frequency at 3 GHz were obtained with a composition of CaO:SrO:Li2O:Sm2O3:TiO2=15.0:1.0:9.0: 12.0:63.0 (molar ratio). Also, band-pass filters made of this material were examined. The filters were greatly miniaturized to the size of about 2 x 5 x 4 mm3 (0.04 cm3).
引用
收藏
页码：4319 / 4322
页数：4
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