Elastic, Dielectric and Piezoelectric Properties of Fe₂O₃ Doped PMnS-PZN-PZT Ceramics

Abstract

Electrical properties of the Fe₂O₃ doped PMnS-PZN-PZT piezoelectric ceramics were investigated in a wide electric field range. The complete set of elastic, dielectric and piezoelectric constants were obtained at low field levels, and the Rayleigh relation was found to describe the nonlinear dielectric behavior at high field levels. It was suggested that proper phase structure enhances the intrinsic dielectric and piezoelectric response, and doping with Fe₂O₃ reduces the extrinsic losses, which result in high piezoelectric properties and low dielectric loss. This work provides a basis to perform theoretical analysis and device design of piezoelectric ceramics.

Keywords:

• High power piezoelectric ceramics
• PMnS-PZN-PZT
• electromechanical properties
• Rayleigh relation
• domain wall contributions

Funding

This work was financially supported by the National Natural Science Foundation of China (No. 51072148, 51202174 and 51102191), Wuhan Scientific and Technological Project (No. 2013010501010137), and the Fundamental Research Funds for the Central Universities (No. NCET-09-0628).