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 100kHz; 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.
|Number of pages||5|
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - 2013 May|
Bibliographical noteFunding Information:
This work was supported by the Industrial Strategic Technology Development Program, 10041232, “Development of synthesis method of exfoliated inorganic nanosheets with a high dielectric constant of >300 and the corresponding thin films applicable for the fabrication of high performance MLCC” funded by the Ministry of Knowledge Economy (MKE, Korea) .
- Layered perovskite
- Low loss
- Multilayer ceramic capacitor
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry