DIELECTRIC-PROPERTIES OF LEAD ALKALINE-EARTH ZIRCONATE AT MICROWAVE-FREQUENCIES

被引:62
作者
KATO, J
KAGATA, H
NISHIMOTO, K
机构
[1] Materials and Devices Research Laboratory, Audio Video Research Center, Matsushita Electric Industrial Co., Ltd, Kadoma, Osaka
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1991年 / 30卷 / 9B期
关键词
DIELECTRIC CERAMICS; MICROWAVE; LEAD ZIRCONATE; CALCIUM ZIRCONATE; CRYSTAL STRUCTURE; DIELECTRIC RESONATOR;
D O I
10.1143/JJAP.30.2343
中图分类号
O59 [应用物理学];
学科分类号
摘要
Dielectric properties of alkaline-earth-substituted PbZrO3 ceramics up to microwave frequencies were investigated. Although there were no preferable characteristics in the Ba- or Sr-substituted system, the ceramics in a (PbCa)ZrO3 system showed not only high dielectric constants in the range of 100 to 118, but also high Q values of 1000 to 1150 and small temperature coefficients of resonant frequency of 0 to 30 ppm/degrees-C. The crystal structure of the Ca-substituted ceramics was also investigated by X-ray powder diffraction. The structure changed from PbZrO3-type orthorhombic to CaZrO3-type orthorhombic through cubic and rhombohedral with increasing Ca substitution. Coaxial dielectric resonators made of the selected above material had Q values in the range of 430 to 450 at the 900 MHz band.
引用
收藏
页码:2343 / 2346
页数:4
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