Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics

Sang Hyo Kweon, Mir Im, Guifang Han, Jin Seong Kim, Sahn Nahm, Ji Won Choi, Seong Ju Hwang

Research output: Contribution to journalArticle

8 Citations (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.

Original languageEnglish
Pages (from-to)907-911
Number of pages5
JournalJournal of the European Ceramic Society
Volume33
Issue number5
DOIs
Publication statusPublished - 2013 May 1

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Dielectric properties
Oxides
Sintering
Dielectric losses
Grain growth
Evaporation
Permittivity
Ions
Liquids

Keywords

  • Dielectrics
  • Layered perovskite
  • Low loss
  • Multilayer ceramic capacitor

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics. / Kweon, Sang Hyo; Im, Mir; Han, Guifang; Kim, Jin Seong; Nahm, Sahn; Choi, Ji Won; Hwang, Seong Ju.

In: Journal of the European Ceramic Society, Vol. 33, No. 5, 01.05.2013, p. 907-911.

Research output: Contribution to journalArticle

Kweon, Sang Hyo ; Im, Mir ; Han, Guifang ; Kim, Jin Seong ; Nahm, Sahn ; Choi, Ji Won ; Hwang, Seong Ju. / Sintering behavior and dielectric properties of KCa2Nb3O10 ceramics. In: Journal of the European Ceramic Society. 2013 ; Vol. 33, No. 5. pp. 907-911.
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AU - Choi, Ji Won

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