期刊
APPLIED PHYSICS LETTERS
卷 99, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3640214
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资金
- National Natural Science Foundation of China [50720145101, 51072158, 50771079]
- National Basic Research Program of China [2010CB613003]
- NCET
- 111 project of China
- Grants-in-Aid for Scientific Research [22360278] Funding Source: KAKEN
We designed a Pb-free pseudo-binary system, Ba(Sn0.12Ti0.88)O-3-x(Ba0.7Ca0.3)O-3 (BTS-xBCT), characterized by a phase boundary starting from a tricritical triple point of a paraelectric cubic phase, ferroelectric rhombohedral, and tetragonal phases. The optimal composition BTS-30BCT exhibits a high piezoelectric coefficient d(33) similar to 530 pC/N at room temperature. In view of the recent report of high piezoelectricity in another Pb-free system BZT-BCT (Liu and Ren, Phys. Rev. Lett. 103, 257602 (2009)), which possesses a similar tricritical triple point in the phase diagram, it seems that forming a suitable phase boundary starting from a tricritical triple point could be an effective way to develop high-performance Pb-free piezoelectrics. (C) 2011 American Institute of Physics. [doi:10.1063/1.3640214]
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