High Power Performance of Manganese‐Doped BNT‐Based Pb‐Free Piezoelectric Ceramics |
| |
| Authors: | Mehdi Hejazi Elaheh Taghaddos Erkan Gurdal Kenji Uchino Ahmad Safari |
| |
| Affiliation: | 1. Glenn Howatt Electroceramics Laboratories, Department of Materials Science and Engineering, Rutgers, The State University of New Jersey, , Piscataway, New Jersey, 08854;2. International Center for Actuators and Transducers, The Pennsylvania State University, , State College, Pennsylvania, 16802 |
| |
| Abstract: | Electromechanical properties and high power characteristics of Pb‐free hard piezoelectric ceramics in the (BiNa0.88K0.08Li0.04)0.5 (Ti1?xMnx)O3 (x = 0, 0.014, 0.015, and 0.016) system were studied. Mn doping resulted in a considerable enhancement of mechanical quality factor Qm and vibration velocity. The lowest mechanical and dielectric losses were achieved in 1.5 mol% Mn‐doped ceramics with a planar Qm of about 970 and tanδ of 0.89%. The heat dissipation and resonance frequency shift under high drive condition were remarkably suppressed upon Mn doping. The maximum vibration velocity was increased from 0.28 m/s in undoped ceramic to 0.6 m/s in 1.5 mol% Mn‐doped composition. The results of this study revealed that Mn‐doped BNT‐based piezoelectrics exhibited a superior high power performance compared to their lead‐based counterparts such as PZT4 and PZT8 ceramics. |
| |
| Keywords: | |
|
|
