Analysis of inhomogeneous stress distribution in the piezoelectric ceramics of unimorph cantilever for energy harvesting

Dae Yong Jeong, Hyun Cheol Song, Hyeong Chan Kim, Chong Yun Kang, Hyun Jai Kim, Seok Jin Yoon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Energy harvesting from the vibration through the piezoelectric effect has been studied for powering the wireless sensor node. As piezoelectric unimorph transducer structure can transfer low vibration to large displacement, this structure was commonly deployed to harvest electric energy from vibrations. Piezoelectric unimorph structure was composed of small stiff piezoelectric ceramic on the large flexible substrate. As there is the large Young's modulus difference between the flexible substrate and stiff piezoelectric ceramic, flexible substrate could not homogeneously transfer the vibration to the stiff piezoelectric ceramic. As a result, most piezoelectric ceramics had been broken at the certain point. Even though the same stress was applied to unimorph cantilever at the end of the unimorph cantilever, there was the difference in output voltages depending on the potion of ceramics. The ratio of the lowest and highest voltage was around 2.4, which reveals the inhomogeneous stress distribution in ceramics.

Original languageEnglish
Title of host publication2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
Pages790-791
Number of pages2
DOIs
Publication statusPublished - 2007
Externally publishedYes
Event2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF - Nara-city, Japan
Duration: 2007 May 272007 May 31

Publication series

NameIEEE International Symposium on Applications of Ferroelectrics

Other

Other2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
CountryJapan
CityNara-city
Period07/5/2707/5/31

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Jeong, D. Y., Song, H. C., Kim, H. C., Kang, C. Y., Kim, H. J., & Yoon, S. J. (2007). Analysis of inhomogeneous stress distribution in the piezoelectric ceramics of unimorph cantilever for energy harvesting. In 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF (pp. 790-791). [4393403] (IEEE International Symposium on Applications of Ferroelectrics). https://doi.org/10.1109/ISAF.2007.4393403