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Relationship Between the Material Properties and Pyroelectric‐Generating Performance of PZTs
Author(s) -
Yamanaka Satoru,
Kim Juyoung,
Nakajima Akira,
Katou Takanori,
Kim Yoonho,
Fukuda Tatsuo,
Yoshii Kenji,
Nishihata Yasuo,
Baba Masaaki,
Yamada Noboru,
Nakayama Tadachika,
Takeda Masatoshi,
Niihara Koichi,
Tanaka Hirohisa
Publication year - 2017
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201600020
Subject(s) - pyroelectricity , figure of merit , materials science , dielectric , energy harvesting , polarization (electrochemistry) , electric field , optoelectronics , energy (signal processing) , physics , ferroelectricity , chemistry , quantum mechanics
In pyroelectric applications, the general figures of merit (FOMs) have been applied and reported near room temperature. We derived the modified FOMs in considering our electro‐thermodynamic cycle for the usage environment of automotive applications. The relationship between the material properties and generating performance of PZTs was investigated at various temperatures. TheF D ¯was suggested from F D , a FOM for a pyroelectric sensor, based on the modified pyroelectric coefficient (p); p ¯ . p ¯ was calculated by the change of the spontaneous polarization (P S ) according to a given temperature variation during one cycle; Δ P S / Δ T (T max −T min ). It was indicated that theF D ¯could be effective as a FOM for the pyroelectric generating performance and the dielectric loss (tanδ ) significantly affected the generating performance in addition to p ¯ under high‐temperature and electric field conditions. Furthermore, of the PZTs tested, C‐91 sample which showed the highest generating performance resulted in a generating energy of 1.3 mW cm –3 in the engine dynamometer assessment. This is 13 times greater than the generating energy reported in a previous study of C‐6 (0.1 mW cm –3 ).