Large recoverable electrostrain in Mn-doped (Ba,Sr) TiO{sub 3} ceramics
- Multi-Disciplinary Materials Research Center and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049 (China)
In this letter we demonstrate that with a different principle, BaTiO{sub 3} ceramics, so far considered as inferior piezoelectrics compared with Pb(Zr,Ti)O{sub 3} (PZT), can show a large recoverable electrostrain. This principle utilizes a point-defect-mediated reversible domain switching mechanism, which can in theory generate 0.368% strain for BaTiO{sub 3} ceramics at the best condition. Experimental results showed that, after aging at room temperature, 1.0 mol % Mn-doped (Ba{sub 0.95}Sr{sub 0.05})TiO{sub 3} ceramics generate a large recoverable nonlinear strain of about 0.12%-0.15% at a field of 3 kV/mm. This value exceeds that of conventional hard PZT piezoelectric ceramics. A microscopic model for the domain-related electrostrain effect in ceramics is proposed. It is also found that the large electrostrain effect is quite stable with respect to both changing frequency and fatigue cycles. Large electrostrain remains recoverable down to 0.05 Hz and after 10 000 cycles. These results demonstrate the potential of our approach in achieving large recoverable electrostrain in environmental-friendly (Pb-free) ceramics.
- OSTI ID:
- 20634498
- Journal Information:
- Applied Physics Letters, Vol. 85, Issue 23; Other Information: DOI: 10.1063/1.1829394; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Accelerated Discovery of Large Electrostrains in BaTiO 3 ‐Based Piezoelectrics Using Active Learning
Outstanding Energy Storage Performance in High‐Hardness (Bi 0.5 K 0.5 )TiO 3 ‐Based Lead‐Free Relaxors via Multi‐Scale Synergistic Design