Nanodomain Engineered (K, Na)NbO3 Lead‐Free Piezoceramics: Enhanced Thermal and Cycling Reliabilities

Content Provider	Semantic Scholar
Author	Yao, Fang-Zhou Wang, Ke Coby Cheng, Li-Qian Zhang, Xixiang Zhang, Wei Zhu, Fangyuan Li, Jing-Feng
Copyright Year	2015
Abstract	The growing environmental concerns have been pushing the development of viable green alternatives for lead-based piezoceramics to be one of the priorities in functional ceramic materials. A polymorphic phase transition has been utilized to enhance piezoelectric properties of lead-free (K, Na)NbO3based materials, accepting the drawbacks of high temperature and cycling instabilities. Here, we present that CaZrO3-modified (K, Na)NbO3 piezoceramics not only possess excellent performance at ambient conditions benefiting from nanodomain engineering, but also exhibit superior stability against temperature fluctuation and electrical fatigue cycling. It was found that the piezoelectric coefficient d33 is temperature independent under 4 kV/mm, which can be attributed to enhanced thermal stability of electric field engineered domain configuration; whereas the electric field induced strain exhibits excellent fatigue resistance up to 10 7 sesquipolar cycles. These findings render the current material an unprecedented opportunity for actuator applications demanding improved thermal and cycling reliabilities.
Starting Page	448
Ending Page	454
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1111/jace.13265
Volume Number	98
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Alternate Webpage(s)	https://doi.org/10.1111/jace.13265
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article