Lead-Free Multilayer Piezoceramic Composites: Effect of Cosintering on Electromechanical Properties

被引:1
作者
Ayrikyan, Azatuhi [1 ,2 ]
Kastner, Andreas [2 ]
Khansur, Neamul Hayet [2 ]
Yasui, Shintaro [3 ]
Itoh, Mitsuru [3 ]
Webber, Kyle G. [2 ]
机构
[1] Tech Univ Darmstadt, D-64289 Darmstadt, Germany
[2] Friedrich Alexander Univ, D-91054 Erlangen, Germany
[3] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 1528550, Japan
关键词
Dielectric; ferroelectric properties; piezoelectic; piezoelectric and ferroelectric transducer materials; FREE PIEZOELECTRIC MATERIALS; PHASE-TRANSITION; BEHAVIOR; CERAMICS; STRAIN; FILMS; PLZT;
D O I
10.1109/TUFFC.2017.2701882
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The macroscopic electromechanical behavior of lead-free multilayer composites was characterized from room temperature to 150 degrees C. The polar seed component consisted of a nonergodic relaxor ( Bi1/2Na1/2) TiO3-7BaTiO(3), with an electric-field-induced long-range ferroelectric order, whereas the nonpolar matrix was an ergodic relaxor Bi-0.5(Na0.75K0.25) 0.5 TiO3-6BiAlO(3) that undergoes a reversible electric-field-induced macroscopic nonpolar-to-polar transition. Microstructural evidence of the effects of cosintering are demonstrated through examination of grain size, interdiffusion, and pore structure. By manipulating the sintering interactions between the two constituents, namely, diffusion paths and residual stresses, both internal mechanical and electrical fields, as well as compositional gradients can be used to enhance the unipolar strain over that expected by a rule of mixtures approximation, thereby improving the properties needed for application of such materials to actuator systems.
引用
收藏
页码:1127 / 1134
页数:8
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