Abstract
Due to issues with Pb toxicity, there is an urgent need for high performance Pb-free alternatives to Pb-based piezoelectric ceramics. Although pure BaTiO3 material exhibits fairly low piezoelectric coefficients, further designing of such a material system greatly enhances the piezoelectric response by means of domain engineering, defects engineering, as well as phase boundary engineering. Especially after the discovery of a Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 system with extraordinarily high piezoelectric properties (d33 > 600 pC/N), BaTiO3-based piezoelectric ceramics are considered as one of the promising Pb-free substitutes. In the present contribution, we summarize the idea of designing high property BaTiO3 piezoceramic through domain engineering, defect-doping, as well as morphotropic phase boundary (MPB). In spite of its drawback of low Curie temperature, BaTiO3-based piezoelectric materials can be considered as an excellent model system for exploring the physics of highly piezoelectric materials. The relevant material design strategy in BaTiO3-based materials can provide guidelines for the next generation of Pb-free materials with even better piezoelectric properties that can be anticipated in the near future.
Highlights
Actuators are devices that can convert input energy into mechanical energy [1]
Wada et al areported thatwith the otherby hand, the extrinsic plays crucial role inhigh further enhancing effect the can 3 single can be On obtained reducing the contribution size of ferroelectric domains apiezoelectric domain-engineered piezoelectric response for
It been achieved on the phase boundary of some material systems should be pointed out that it is physically clearer to use BZT–BCT to demonstrate the morphotropic phase boundary origin for such a material system. Such a physical idea has been adopted in the designing of KNN–based, lead-free piezoelectric materials, and a promisingly large piezoelectric response has been achieved on the phase boundary of some material systems [18,22,57,58]
Summary
Actuators are devices that can convert input energy into mechanical energy [1]. Among the varieties of actuators with different input energy (including electromagnetic, electrostatic, and thermal energies [2,3,4] etc.), piezoelectric actuators feature high strain output, high response speed, and high displacement control accuracy. The widely investigated Pb-free piezoelectric materials have focused on, but are not limited to KNN ((K1/2 Na1/2 )NbO3 )-based, BNT ((Bi1/2 Na1/2 )TiO3 ) or BKT ((Bi1/2 K1/2 )TiO3 )-based, and BaTiO3 -based ferroelectric material systems, which show large piezoelectric response [17,18,19,20,21,22,23,24,25,26,27] Among these potential substitutions for PZT, the class of BaTiO3 -based piezoelectric material is easy to process with better electromechanical properties.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
