Observation of Failure and Domain Switching in Lead Zirconate Titanate Ceramics

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概要

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• The mechanical and electrical properties (electromechanical coupling coefficient, piezoelectric constant and dielectric constant) of lead zirconate titanate (PZT) ceramics are investigated during mechanical static and cyclic loading. There are several failure characteristics which can alter the material properties of PZT ceramics. The elastic constant increases and electrical properties decrease with increasing the applied load. This is due to the internal strain arising from the domain switching. In this case, 90° domain switching occurs anywhere in the samples as the sample is loaded. It is also apparent that electrogenesis occurs several times during cyclic loading to the final fracture. This occurrence is related to the domain switching. The elastic constant and electrical properties can decrease because of crack generation in the PZT ceramics. Moreover, the elastic constant increases with increase of the mechanical load and decreases with decrease of the load. On the contrary, the opposite sense of change of the electrical properties is observed.

• 一般社団法人 日本機械学会の論文

著者

• Sato Kazuto

  Department Of Chemical Engineering Faculty Of Engineering Iwate University

• Mizuno Mamoru

  Department Of Energy Science And Engineering Kyoto University

• SATO Kazuto

  Department of Machine Intelligence and Systems Engineering, Akita Prefectural University

• OKAYASU Mitsuhiro

  Department of Machine Intelligence and Systems Engineering, Akita Prefectural University

• SUGIYAMA Eriko

  Department of Machine Intelligence and Systems Engineering, Akita Prefectural University

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