Abstract
BiFe0.5Ta0.5O3 (BFT) doped K0.5Na0.5NbO3 (KNN) lead-free piezoelectric ceramics were prepared by normal sintering. The effect of BFT addition on KNN ceramics was investigated through X-ray diffraction (XRD), dielectric, ferroelectric and electric field-induced strain characterizations. XRD revealed that BFT addition had no remarkable effect on the crystal structure of KNN ceramics in the studied composition range. Both orthorhombic to tetragonal and tetragonal to cubic phase transition temperatures decreased with increasing BFT. Real and imaginary parts of complex impedance of the materials were investigated. The semicircles shifted to small with temperature increasing showing a typical negative temperature coefficient of resistance (NTCR) character of samples. The unipolar field-induced strain was enhanced from 0.097% for pure KNN to 0.135% for 0.50mol% of BFT, corresponding to a d33* (Smax/Emax) of 235pm/V. It is expected that this piezoceramic is promising candidate for lead-free piezoceramics and could be used in practical applications.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
