| Pb($Zr_{0.52}$ $Ti_{0.48}$)$O_3$세라믹스의 유전 및 압전성에 미치는 $MnO_2$ 의 영향 |
| 김종선, 윤기현1, 최병현2, 박종옥2, 이종민2 |
삼성코닝 연구소
1연세대학교 요업공학과
2도자기 시험소 |
| Effects of $MnO_2$ on the Dielectric and Piezoelectric Properties of Pb($Zr_{0.52}$ $Ti_{0.48}$)$O_3$ Ceramics |
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| ABSTRACT |
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Effects of MnO2 addition ranged from 0.0wt% to 5.0wt% on the microstructure and dielectric and piezoelectric properties of the Pb(Zr0.52 Ti0.48)O3 Ceramics have been investigated. The solubility limit of MnO2 in Pb(Zr0.52 Ti0.48)O3 is about 0.5wt%, and MnO2 as a valence state of Mn3+ is substituted for (Zr, Ti) lattice site in PZT solid-solution. The addition of MnO2 up to 0.5wt% in Pb(Zr0.52 Ti0.48)O3 brings increase of density, but decreased of grain size and tetragonality. Dielectric constant slightly decreases, but both coupling factor(Kp) and mechanical quality factor(Qm) increase with the addition of MnO2. However, excess amount of MnO2 addition more than 0.75wt% results in rapid decrease of resistance. Dielectric constant and tan $delta$ increase due to the second phase and inhomogeneous Mn distribution. |
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