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PCW-PNN-PZT+0.5 wt%MnO<sub>2</sub> 세라믹스의 소결 및 압전특성
신혜경,정보람,주진수,배선기,Shin, Hyea-Kyoung,Chung, Bo-Ram,Ju, Jin-Soo,Bae, Seon-Gi 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.5
In this thesis, piezoelectric properties and sintering properties of PCW-PNN-PZT+0.5 wt%$MnO_2$ ceramics adding $B_2O_3$ after creating the specimens with a general method. The lattice constant from the analysis of crystal structure showed that the crystal structure of ceramic features both rhombohdral and tetragonal structures and that the pychlore structure was decreased with the increase of the sintering temperature. The electromechanical coupling coefficient showed its maximum of 31 % in the sintered specimens at $1050^{\circ}C$, and its minimum of 20 % in the sintered specimens at $1150^{\circ}C$. The mechanical quality coefficient marked the maximum of 139 at the sintering temperature of $1150^{\circ}C$.
배선기,신혜경,이석진,임인호,Bae, Seon Gi,Shin, Hyea-Kyoung,Lee, Suk-Jin,Im, In-Ho 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.2
We investigated the dielectric relaxation properties $0.5Ba(Zr_{0.2}Ti_{0.8})O_3-0.5(Ba_{0.7}Ca_{0.3})TiO_3$ ceramics with CuO addition. With increasing CuO addition, the lattice parameter was increased by substitution of small amount $Cu^{2+}$ ion in B-site of $0.5Ba(Zr_{0.2}Ti_{0.8})O_3-0.5(Ba_{0.7}Ca_{0.3})TiO_3$ ceramics. Also the grain size and the maximum dielectric constant of $0.5Ba(Zr_{0.2}Ti_{0.8})O_3-0.5(Ba_{0.7}Ca_{0.3})TiO_3$ ceramics was decreased with increasing amounts of CuO addition. Moreover, the diffused phase transition properties (${\gamma}$) of $0.5Ba(Zr_{0.2}Ti_{0.8})O_3-0.5(Ba_{0.7}Ca_{0.3})TiO_3$ ceramics was increased by compositional fluctuation with increasing of CuO amount, changed from 1.45 at 1 wt% CuO addition to 1.94 at 7 wt% CuO addition.
첨가제에의한 PCW-PNN-PZT 세라믹스의 압전특성에 관한 연구
정보람(Jung Bo-Ram),신혜경(Shin Hyea-Kyoung),주진수(JU Jin-Su),배선기(Bae Seon-Gi) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this thesis, the minuteness structure, piezoelectric, and dielectric characteristics of Pb[(Co0.5 W0.5) 0.03 (Nil/3 Nb2/3) 0.07(Zr0.52 Ti0.48)0.9]O3 + 0.5Wt% MnO2 ceramics has been systematically investigated as a function of the sintering temperature after manufacturing the specimens with a general method. The electromechanical coupling coefficient (Kp) showed its maximum of 31.116[%] in the sintered specimens at 1050[℃], and its minimum of 20.220[%] in the sintered specimens at 1150[℃]. The mechanical quality coefficient (Qm) marked the maximum of 139.526 at the sintering temperature of 1150[℃].
CuO 첨가에 따른 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 세라믹스의 유전 이완 특성
배선기 ( Seon Gi Bae ),신혜경 ( Hyea Kyoung Shin ),이석진 ( Suk Jin Jin Lee ),임인호 ( In Ho Im ) 한국전기전자재료학회 2015 전기전자재료 Vol.28 No.2
We investigated the dielectric relaxation properties 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramics with CuO addition. With increasing CuO addition, the lattice parameter was increased by substitution of small amount Cu2+ion in B-site of 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramics. Also the grain size and the maximum dielectric constant of 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramics was decreased with increasing amounts of CuO addition. Moreover, the diffused phase transition properties (γ) of 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramics was increased by compositional fluctuation with increasing of CuO amount, changed from 1.45 at 1 wt% CuO addition to 1.94 at 7 wt% CuO addition.