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윤석우,이규탁,이경수,정순종,김민수,조경호,고중혁,Yun, Seok-Woo,Lee, Ku-Tak,Lee, Kyoung-Su,Jeong, Soon-Jong,Kim, Min-Soo,Cho, Kyoung-Ho,Koh, Jung-Hyuk 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.8
In this study, the piezoelectric energy harvester was investigated employing the pillar structure with the diameter size of 50~500 um. Usually, the aspect ratio between the height and diameter was related with the piezoelectric performance. High aspect ratio was showed the low electric noise and high piezoelectric properties than low aspect ratio. Therefore, we have selected the Su-8 photo-resist and modified lithography process to manufacture the pillar structure with height above the 250 ${\mu}m$. In this presentation, we will report the process and properties of micro pillar structure based on the PMN-PZT (Pb$(Mg_{1/3}Nb_{2/3})O_3$-PbZrTiO$_3$) materials.
비납계 (Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub>-BaTiO<sub>3</sub> 강유전 세라믹 재료의 유전 및 압전 특성
국민호,김명호,조정아,성연수,송태권,배동식,정순종,송재성,Kuk Min-Ho,Kim Myong-Ho,Cho Jung-A,Sung Yeon-Soo,Song Tae Kwon,Bae Dong-Sik,Jeong Soon-Jong,Song Jae-Sung 한국재료학회 2005 한국재료학회지 Vol.15 No.11
The structural, piezoelectric and ferroelectric properties of $(1-x)(Bi_{0.5}Na_{0.5})TiO_3$ x=0.00, 0.02, 0.04, 0.06, 0.08, and 0.10) ceramics were investigated. A gradual change in the crystal and microstructures with tile increase of $BaTiO_3$ (BT) concentration was observed. The $(Bi_{0.5}Na_{0.5})TiO_3$ (BNT) samples show unusual properties as ferroelectric relaxer materials. We observed a phase transition in BNT solid solutions with BT having normal ferroelectric phase transition. At room temperature, BNT presents a single phase without the morphotropic phase boundary (MPB). In the case of samples doped with $4\~8 mol\%$ BT, rhombohedral-tetragonal MPB was formed and the piezoelectric properties were improved.