期刊
APPLIED PHYSICS LETTERS
卷 105, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4891960
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资金
- Research Grants Council of the Hong Kong Special Administrative Region, China [9041211]
- Hong Kong Polytechnic University [1-ZVCG]
Hierarchical nanodomains assembled into micron-sized stripe domains, which is believed to be associated with outstanding piezoelectric properties, were observed at room temperature in a typical lead free piezoceramics, (Na0.52K0.48-x)(Nb0.95-xTa0.05)-xLiSbO(3), with finely tuned polymorphic phase boundaries (x = 0.0465) by transmission electron microscopy. The evolution of domain morphology and crystal structure under heating and cooling cycles in the ceramic was investigated by in-situ hot stage study. It is found that the nanodomains are irreversibly transformed into micron-sized rectangular domains during heating and cooling cycles, which lead to the thermal instability of piezoelectric properties of the materials. (C) 2014 AIP Publishing LLC.
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