High Power Performance of Manganese-Doped BNT-Based Pb-Free Piezoelectric Ceramics
| Autor: | Mehdi Hejazi, Erkan A. Gurdal, Kenji Uchino, Elaheh Taghaddos, Ahmad Safari |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Doping chemistry.chemical_element Power performance Thermal management of electronic devices and systems Manganese Piezoelectricity Quality (physics) chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Dielectric loss Ceramic Composite material |
| Zdroj: | Journal of the American Ceramic Society. 97:3192-3196 |
| ISSN: | 0002-7820 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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