Journal
JOURNAL OF APPLIED PHYSICS
Volume 117, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4913454
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Funding
- National Natural Science Foundation of China [51207121, 51471127]
- National Basic Research Program of China [2012CB619401, 51431007, IRT13034, 51321003]
- China Postdoctoral Science Foundation [2013M540751]
- State Key Laboratory of Electrical Insulation and Power Equipment [EIPE14309]
- Fundamental Research Funds for the Central Universities
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We employ transmission electron microscopy to explore the reason for large piezoelectricity (d(33) approximate to 400pC/N) in a Pb-free 0.96(K0.5Na0.5)(0.95)Li0.05Nb0.93Sb0.07O3 -0.04BaZrO(3) ceramic from microstructure. The result shows that the high piezoelectricity corresponds to a miniaturized nanodomain configuration in a domain hierarchy. The nanodomains disappear on heating accompanied by a reduction in d(33) value. Further convergent beam electron diffraction study reveals a coexistence of tetragonal and orthorhombic phase, which indicates that large piezoelectricity of KNLNS0.07-BZ may stem from easy polarization rotation due to low polarization anisotropy on the tetragonal-orthorhombic phase boundary. (C) 2015 AIP Publishing LLC.
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