Dielectric, Ferroelectric and Piezoelectric study of BNT-BT solid solutions around the MPB region

National Conference on Processing and Characterization of Materials

Badapanda, T.^1 ; Sahoo, S.^2 ; Nayak, P.^3

Department of Physics, C.V. Raman College of Engineering, Odisha, Bhubaneswar

752054, India^1

Department of Physics, Centurion University of Technology and Management, Odisha, Bhubaneswar

751020, India^2

Department of Physics and Astronomy, National Institute of Technology, Rourkela

Odisha

769008, India^3

关键词: Electric displacement;    Ferroelectric and piezoelectric properties;    Morphotropic phase boundaries;    Piezoelectric;    Piezoelectric coefficient;    Piezoelectric studies;    Solid state reaction route;    Structural characterization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/178/1/012032/pdf
DOI  :  10.1088/1757-899X/178/1/012032

来源: IOP

【 摘 要 】

The (1-x)(Bi0.5Na0.5)TiO3- xBaTiO3 (x=0.01-0.1) has been prepared by solid state reaction route. The structural characterizations of the solid solutions were done by X-ray diffraction and Raman spectroscopy, which shows that the morphotropic phase boundary exist between x=0.05-0.1. The dielectric, ferroelectric and piezoelectric properties were studied around the MPB region. It is observed from the temperature and frequency dependent dielectric study that the dielectric constant increase with x values up to x=0.08 and then after decreases with x values. The variation of polarization with electric field for all compositions have been done and it is observed that polarization value is high at x=0.08. The electric displacement of the compositions having MPB with various electric field has been carried out and highest piezoelectric coefficient has been observed at x=0.08. All the characterizations concluded that the composition x=0.08 will be very suitable for actuator application.