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Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics

Title
Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics
Authors
Kweon S.-H.Im M.Han G.Kim J.-S.Nahm S.Choi J.-W.Hwang S.-J.
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2013
Journal Title
Journal of the European Ceramic Society
ISSN
0955-2219JCR Link
Citation
vol. 33, no. 5, pp. 907 - 911
Indexed
SCI; SCIE; SCOPUS WOS scopus
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°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. © 2012 Elsevier Ltd.
DOI
10.1016/j.jeurceramsoc.2012.11.017
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자연과학대학 > 화학·나노과학전공 > Journal papers
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