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http://dx.doi.org/10.4313/JKEM.2012.25.12.955

Optimization of the Unimorph Cantilever Generator (UCG) Using Pb(Zr0.54Ti0.46)O3 + 0.2 wt% Cr2O3 + 1.0 wt% Nb2O5 thick films  

Kim, Kyoung-Bum (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology)
Kim, Chang-Il (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology)
Yun, Ji-Sun (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology)
Jeong, Young Hun (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology)
Nahm, Jung Hee (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology)
Cho, Jeong-Ho (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology)
Paik, Jong-Hoo (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology)
Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
Seong, Tae-Hyeon (Department of Electrical Engineering, Hanyang University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.25, no.12, 2012 , pp. 955-960 More about this Journal
Abstract
We fabricated piezoelectric unimorph cantilever generators (UCG) using $Pb(Zr_{0.54}Ti_{0.46})O_3$ + 0.2 wt% $Cr_2O_3$ + 1.0 wt% $Nb_2O_5$ (PZCN) piezoelectric thick films, which were produced by a tape casting method. The PZCN thick films were tailored with same width and thickness but different lengths from 7.7 to 57.7 mm in order to evaluate optimized UCG for energy harvesting device applications. When the length of PZCN film was increased, the resonance frequency of UCG was slightly increased from 7 Hz to 8 Hz, which could be due to enlarged area of the highly stiff piezo-ceramic film. However, the output power was proportionally increased with the length of PZCT film and it reached 4.68 mW (1.221 $mW/cm^3$) when the film's length was 57.7 mm under 25 g of tip mass at 8 Hz, which is sufficient for micro-scale device applications.
Keywords
Tape casting; PZT; Energy harvesting; Unimorph cantilever;
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