Influence of Porosity on Polarization in Piezoelectret Films with Regular Microstructure

Abstract:

Piezoelectret films, with a controlled ordered microstructure and various porosities, were fabricated by using a patterning-fusion bonding method. The polarization in the films with various porosities is investigation. The results show that the critical applied bias voltage for the breakdown in the inner voids is dependent on the porosity in the films. The threshold voltages for the polarization in the fabricated films with the porosities of 0, 25 and 44% are around 4000, 2000 and 2000 V, respectively. The piezoelectric d33 coefficients are enhanced by increasing the applied bias voltage during polarization.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 1235-1238
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.1235
• Online since: October 2011
• Authors: Ke Xing Lou, Gong Xun Cao, Qiong You, Xiao Qing Zhang
• Keywords: Breakdown Voltage, Patterning Method, Piezoelectrets, Piezoelectric Properties, Polarization, Porosity

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