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Effect of Porosity on Energy Harvesting Performance of 0.5Ba(Ca 0.8 Zr 0.2 )O 3 − 0.5(Ba 0.7 Ca 0.3 )TiO 3 Ceramics: A Numerical Study
Author(s) -
Karmakar Saptarshi,
Kiran Raj,
Singh Chauhan Vishal,
Vaish Rahul
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201901302
Subject(s) - porosity , unimorph , materials science , lead zirconate titanate , energy harvesting , composite material , voltage , vibration , piezoelectricity , ferroelectricity , power (physics) , acoustics , optoelectronics , electrical engineering , dielectric , physics , quantum mechanics , engineering
Finite element analysis is conducted on a barium calcium zirconate titanate 0.5 Ba ( Ca 0.8 Zr 0.2 ) O 8 − 0.5 ( Ba 0.7 Ca 0.3 ) TiO 3 (BCZT) material to investigate its energy harvesting performance at different porosities. Porosities are gradually increased to 25% in steps of 5. BCZT piezoceramics attached to a host cantilever beam in unimorph configuration and subjected to base vibration are considered for the present study. Bothd 31andd 33modes are considered. Power is harvested using a load resistance optimized with the structure's natural frequency of vibration. Up to a certain porosity level, an increase in voltage and power is observed in the system. An increment in voltage by ≈95% ind 31mode and ≈119% ind 33mode is observed at 10% porosity. Power increased by 50% ind 31mode and by 53% ind 33mode at 5% porosity compared with the nonporous material.