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(Ba,Ca)SiO3 Glass Frit 첨가에 따른 NKN-BT 세라믹스의유전 완화 특성

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

Seon Gi Bae, Hyeo Kyung Shin, Seung Hwan Lee, In Ho Lm
J Electr Electron Mater 2014;27(6):367-371.
Published online: June 1, 2014
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본 논문은 (Ba,Ca)SiO3 glass frit이 첨가된 Pb-free 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 세라믹스의 유전 이완 특성에 대하여 연구하였다. (Ba,Ca)SiO3 glass frit이 첨가된 Pb-free 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 세라믹스의 결정구조는 사방정계와 정방정계가 혼재된 구조였으며, (Ba,Ca)SiO3 glass frit 첨가량이 증가함에 따라 큐리온도는 감소하였으며 최대 유전상수는 증가하였다. 특히 (Ba,Ca)SiO3 glass frit의 첨가량이 증가함에 따라 큐리 바이스 법칙을 벗어나는 특성, 즉 리랙서의 특성을 나타내었다.

We investigated dielectric relaxation properties of 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics byaddition (0∼0.3 wt%) of (Ba,Ca)SiO3 glass frit. All composition of 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 added(Ba,Ca)SiO3 glass frit showed the same crystallographic properties, coexistence of orthorhombic andtetragonal phase. By increasing addition of (Ba,Ca)SiO3 glass frit, the Curie temperatures of0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics were decreased, whereas maximum dielectric constants of0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics were dramatically increased. Especially the deviations of Curietemperature 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics were increased by increasing amount of(Ba,Ca)SiO3 glass frit, and it indicated that 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics added (Ba,Ca)SiO3glass frit have relaxor characteristics.

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Dielectric Relaxation Properties of KNN-BT Ceramics with (Ba,Ca)SiO3 Glass Frit
J Electr Electron Mater. 2014;27(6):367-371.   Published online June 1, 2014
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Dielectric Relaxation Properties of KNN-BT Ceramics with (Ba,Ca)SiO3 Glass Frit
J Electr Electron Mater. 2014;27(6):367-371.   Published online June 1, 2014
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