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http://dx.doi.org/10.5370/KIEE.2011.60.11.2093

Structural and Electrical Properties of (Na0.5K0.5)NbO3 Ceramics with Addition of BiTiO3  

Lee, Tae-Ho (경상대 공대 세라믹 공학과)
Kim, Dae-Young (경상대 공대 세라믹 공학과)
Jo, Seo-Hyeon (경상대 공대 세라믹 공학과)
Jeong, Gwang-Ho (경상대 공대 세라믹 공학과)
Lee, Sung-Gap (경상대 공학원 세라믹 공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.60, no.11, 2011 , pp. 2093-2096 More about this Journal
Abstract
In this study, lead-free $(Na_{0.5}K_{0.5})NbO_3-BiTiO_3$ ceramics were fabricated by a conventional mixed oxide method. Structural and electrical properties of lead-free $(Na_{0.5}K_{0.5})NbO_3$ ceramics with the variation of $BiTiO_3$ were investigated. The results of X-ray diffraction analysis showed a typical polycrystalline perovskite structure without presence of the second phase in all specimens. Sintered density increased with an increasing of BTO and the specimen added with 0.07 mol% of $BiTiO_3$ showed the maximum value of 97.8%. Average grain size decreased and densification increased with an increasing of $BiTiO_3$ contents. The electromechanical coupling factor of the 0.01 mol% $BiTiO_3$ doped NKN specimens was 0.32. Dielectric constant, dielectric loss and Curie temperature of the 0.07 mol% $BiTiO_3$ doped NKN specimens were 1185, 0.145% and $400^{\circ}C$, respectively.
Keywords
Electrical properties; NKN; BTO; Piezoelectric; Dielectric constant;
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Times Cited By KSCI : 1  (Citation Analysis)
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