Loss mechanisms and high power piezoelectrics

Kenji Uchino, J. H. Zheng, Y. H. Chen, X. H. Du, J. Ryu, Y. Gao, S. Ural, Shashank Priya, S. Hirose

Research output: Chapter in Book/Report/Conference proceedingChapter

6 Scopus citations

Abstract

Heat generation is one of the significant problems in piezoelectrics for high power density applications. In this paper, we review the loss mechanisms in piezoelectrics first, followed by the heat generation processes for various drive conditions. Heat generation at off-resonance is caused mainly by dielectric loss tan δ′ (i.e., P-E hysteresis loss), not by mechanical loss, while the heat generation at resonance is mainly attributed to mechanical loss tan ′. Then, practical high power materials developed at Penn State is introduced, which exhibit the vibration velocity more than 1 m/s, leading to the power density capability 10 times of the commercially available hard PZTs. We propose a internal bias field model to explain the low loss and high power origin of these materials. Finally, using a low temperature sinterable hard PZT, we demonstrated a high power multilayer piezoelectric transformers

Original languageEnglish (US)
Title of host publicationFrontiers of Ferroelectricity
Subtitle of host publicationA Special Issue of the Journal of Materials Science
PublisherSpringer US
Pages217-228
Number of pages12
ISBN (Print)038738037X, 9780387380377
DOIs
StatePublished - Dec 1 2007

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Chemistry(all)

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