Novel Temperature Stable Li2MnO3 Dielectric Ceramics with High Q for LTCC Applications

Novel microwave dielectric ceramics in the Li2MnO3 system with high Q prepared through a conventional solid‐state route had been investigated. All the specimens exhibited single phase ceramics sintered in the temperature range 1140°C–1230°C. The microwave dielectric properties of Li2MnO3 ceramics we...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2014-06, Vol.97 (6), p.1918-1922
Main Authors: Tseng, Ching-Fang, Tseng, Po-Ju, Chang, Chi-Min, Kao, Yu-Chieh
Format: Article
Language:English
Subjects:
Ceramics
Communications systems
Correlation
Density
Dielectric properties
Dielectric strength
Dielectrics
Microwaves
Sintering
Wireless communication systems
Wireless communications
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Summary:Novel microwave dielectric ceramics in the Li2MnO3 system with high Q prepared through a conventional solid‐state route had been investigated. All the specimens exhibited single phase ceramics sintered in the temperature range 1140°C–1230°C. The microwave dielectric properties of Li2MnO3 ceramics were strongly correlated with sintering temperature and density. The best microwave dielectric properties of εr = 13.6, Q × f = 97 000 (GHz), and τf = −5.2 ppm/°C could be obtained as sintered at 1200°C for 4 h. BaCu(B2O5) (BCB) could effectively lower the sintering temperature from 1200°C to 930°C and slightly induced degradation of the microwave dielectric properties. The Li2MnO3 ceramics doped with 2 wt% BaCu(B2O5) had excellent dielectric properties of εr = 11.9, Q × f = 80 600 (GHz), and τf = 0 ppm/°C. With low sintering temperature and good dielectric properties, the BCB added Li2MnO3 ceramics are suitable candidates for LTCC applications in wireless communication system.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.12871