(1-x)BaTiO3-x(Na0.5K0.5)NbO3 ceramics for multilayer ceramic capacitors

Chang Hak Choi, Cheol Woo Ahn, Sahn Nahm, Jung Oh Hong, Jung Soo Lee

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Abstract

(1-x)BaTiO3-x(Na0.5K0.5)NbO3 ceramics with 0.0 ≤x≤0.08 formed a homogeneous solid solution. As (Na 0.5K0.5)NbO3 (NKN) was added, the Curie temperature of the BaTiO3 (BT) ceramics decreased and specimens became a relaxor as x exceeded 0.04. The grain size of the BT ceramics decreased with increasing NKN. The average grain size was approximately 0.4 μm at x =0.06. The dielectric constant (εr) of the specimen increased with increasing NKN and high εr of 7402 with low dielectric loss of < 1.0% was observed for the 0.94BT-0.06NKN ceramic. Therefore, the 0.94BT-0.06NKN ceramic is proposed as a promising candidate material for thin multilayer ceramic capacitors with high capacitance.

Original languageEnglish
Article number132905
JournalApplied Physics Letters
Volume90
Issue number13
DOIs
Publication statusPublished - 2007 Apr 8

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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