期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 98, 期 2, 页码 448-454出版社
WILEY-BLACKWELL
DOI: 10.1111/jace.13265
关键词
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资金
- National Nature Science Foundation of China [51332002, 51302144, 51221291, 51211140345]
- Specialized Research Fund for the Doctoral Program of Higher Education [20130002120031]
- Tsinghua University Initiative Scientific Research Program [20131089230]
- Danish National Research Foundation [DNRF86-5]
- National Natural Science Foundation of China [51261130091]
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)NbO3-based 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 d(33) is temperature independent under 4kV/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.
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