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http://dx.doi.org/10.4313/JKEM.2014.27.6.367

Dielectric Relaxation Properties of KNN-BT Ceramics with (Ba,Ca)SiO3 Glass Frit  

Bae, Seon Gi (Department of Electrical Engineering, Incheon National University)
Shin, Hyeo-Kyung (Department of Electrical Engineering, Incheon National University)
Lee, Seung-Hwan (R&D Center, Samwha Capacitor Co., Ltd.)
Im, In-Ho (Electrical Engineering, Shinansan University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.27, no.6, 2014 , pp. 367-371 More about this Journal
Abstract
We investigated dielectric relaxation properties of $0.95(Na_{0.5}K_{0.5})NbO_3-0.05BaTiO_3$ ceramics by addition (0~0.3 wt%) of $(Ba,Ca)SiO_3$ glass frit. All composition of $0.95(Na_{0.5}K_{0.5})NbO_3-0.05BaTiO_3$ added $(Ba,Ca)SiO_3$ glass frit showed the same crystallographic properties, coexistence of orthorhombic and tetragonal phase. By increasing addition of $(Ba,Ca)SiO_3$ glass frit, the Curie temperatures of $0.95(Na_{0.5}K_{0.5})NbO_3-0.05BaTiO_3$ ceramics were decreased, whereas maximum dielectric constants of $0.95(Na_{0.5}K_{0.5})NbO_3-0.05BaTiO_3$ ceramics were dramatically increased. Especially the deviations of Curie temperature $0.95(Na_{0.5}K_{0.5})NbO_3-0.05BaTiO_3$ ceramics were increased by increasing amount of $(Ba,Ca)SiO_3$ glass frit, and it indicated that $0.95(Na_{0.5}K_{0.5})NbO_3-0.05BaTiO_3$ ceramics added $(Ba,Ca)SiO_3$ glass frit have relaxor characteristics.
Keywords
NKN-BT; Dielectric relaxation; Relaxor; Curie temperature; Glass frit;
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