Title :
Vibration reduction of MLCC considering piezoelectric and electrostriction effect
Author :
Dongjoon Kim ; Byung-Han Ko ; Sanggeuk Jeong ; No-Cheol Park ; Young-Pil Park
Author_Institution :
Dept. of Mech. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
In this study, vibration of MLCC was analyzed considering nonlinear characteristic of BaTiO3. By construction of FE model of MLCC, total deformation was classified into piezoelectric and electrostrictive deformation. As piezoelectric coefficient is largely influenced by polarization of dipoles, poling process was proceeded to reduce the piezoelectric deformation. 4 variables were considered factors of poling process; heating temperature, poling voltage, dc voltage input time, and aging time. The effects of poling process were verified by experiment and FEA; vibration was reduced by 39.7%. For poled MLCC soldered on simple rectangular circuit board, sound pressure level was reduced by more than 4 times compared to unpoled state.
Keywords :
ageing; barium compounds; ceramic capacitors; dielectric polarisation; electrostriction; piezoelectricity; vibrations; BaTiO3; MLCC; aging time; dc voltage input time; dipole polarization; electrostrictive deformation; heating temperature; multilayer ceramic capacitor; piezoelectric deformation; poling process; poling voltage; total deformation; vibration reduction; Ceramics; Electric fields; Electrostriction; Piezoelectricity; Printed circuits; Temperature; Vibrations; acoustic noise; electrostriction; multi-layer ceramic capacitor; piezoelectricity; poling process;
Conference_Titel :
Applications of Ferroelectric, International Symposium on Integrated Functionalities and Piezoelectric Force Microscopy Workshop (ISAF/ISIF/PFM), 2015 Joint IEEE International Symposium on the
Conference_Location :
Singapore
DOI :
10.1109/ISAF.2015.7172701
