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Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics
- Authors
- Kweon, Sang-Hyo; Im, Mir; Han, Guifang; Kim, Jin-Seong; Nahm, Sahn; Choi, Ji-Won; Hwang, Seong-Ju
- Issue Date
- 5월-2013
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Dielectrics; Layered perovskite; Low loss; Multilayer ceramic capacitor
- Citation
- JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.33, no.5, pp.907 - 911
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
- Volume
- 33
- Number
- 5
- Start Page
- 907
- End Page
- 911
- ISSN
- 0955-2219
- Abstract
- Dense KCa2Nb3O10 (KCN) oxides were synthesized and their dielectric properties were investigated. A homogeneous KCN phase was formed in the specimen sintered above 1300 degrees C, but a CaNb2O6 secondary phase was developed in the specimen sintered at 1400 degrees 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. (C) 2012 Elsevier Ltd. All rights reserved.
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