Cryogenic electromechanical behavior of multilayer piezo-actuators for fuel injector applications

Yasuhide Shindo, Fumio Narita, Takayoshi Sasakura

研究成果: Article査読

20 被引用数 (Scopus)

抄録

This paper examines theoretically and experimentally the electromechanical behavior of multilayer piezo-actuators for fuel injectors at cryogenic temperatures. A thermodynamic model was employed to predict a monoclinic phase. A shift in the morphotropic phase boundary (MPB) between the tetragonal and rhombohedral/monoclinic phases with decreasing temperature was determined, and the temperature dependent piezoelectric coefficients were obtained. Temperature dependent coercive electric field was also predicted based on the domain wall energy. A finite element analysis was then performed to calculate the nonlinear electromechanical fields of the multilayer piezo-actuators from room to cryogenic temperatures, due to the shift in the MPB and polarization switching. In addition, experimental results on the electric field induced strain, which verify the model, were presented.

本文言語English
論文番号084510
ジャーナルJournal of Applied Physics
110
8
DOI
出版ステータスPublished - 2011 10月 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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