1. Phase transition and high piezoelectricity in (Ba,Ca)(Ti1-xSnx)O3 lead-free ceramics.
- Author
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Zhu, Li-Feng, Zhang, Bo-Ping, Zhao, Xiao-Kun, Zhao, Lei, Yao, Fang-Zhou, Han, Xi, Zhou, Peng-Fei, and Li, Jing-Feng
- Subjects
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PERMITTIVITY , *LEAD-free ceramics , *X-ray diffraction , *PIEZOELECTRICITY , *PHASE transitions , *DIFFERENTIAL scanning calorimetry - Abstract
The phase structure in the (Ba,Ca)(Ti1-xSnx)O3 lead-free ceramics was evolved from inceptive orthorhombic (O) at 0 ≤ x ≤ 0.04 to a two-phase coexistence of pseudocubic-orthorhombic (PC-O) at 0.06 ≤ x ≤ 0.10 and further to a multiphase coexistence of rhombohedral-pseudocubic-orthorhombic (R-PC-O) at x = 0.11. Due to the multiphase coexistence of R-PC-O at room temperature proved by X-ray diffraction, dielectric constant [variant_greek_epsilon]r and differential scanning calorimetry, an ultrahigh piezoelectric coefficient d33 = 670 pC/N and electrostrain 0.061% were achieved. The high d33 over 520 pC/N was stabilized in a wide compositional range of 0.07 ≤ x ≤ 0.11, suggesting that (Ba,Ca)(Ti,Sn)O3 ceramics are a promising candidate for the lead-free piezoelectric ceramics. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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