Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics
- Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics
- 권상효; 임미르; 한귀팡; 김진성; 남산; 최지원; 황성주
- Dielectric; Layered perovskite; Low loss; Multilayer ceramic capacitor
- Issue Date
- Journal of the European Ceramic Society
- VOL 33, NO 5, 907-911
- Dense KCa2Nb3O10 (KCN) oxides were synthesized and their dielectric properties were investigated. A homogeneous KCN phase was formed
in the specimen sintered above 1300 ◦C, but a CaNb2O6 secondary phase was developed in the specimen sintered at 1400 ◦C, as result of the
evaporation of K2O. The KCN oxides sintered at 1375 ◦C showed a high relative density that was 97.1% of the theoretical density. Furthermore,
liquid-phase-assisted abnormal grain growth occurred during sintering. The dielectric constant of this KCN oxide was 46, with a low dielectric loss
of 0.9% at 100 kHz; these values are smaller than those that were previously reported. Complex impedance analysis indicated that the resistivity of
the KCN oxide was very low, probably as a result of the presence of K+ ions between the layers, and this could be the origin of the low-frequency
dispersion of the KCN oxides.
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