Nonlinear strain and DC bias induced piezoelectric behaviour of electrostrictive lead magnesium niobate-lead titanate ceramics under high electric fields
| Autor: | A J Masys, B K Mukherjee, W. Ren, G. Yang |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Piezoelectric coefficient Acoustics and Ultrasonics Electrostriction Condensed matter physics Mineralogy Condensed Matter Physics Polarization (waves) Piezoelectricity Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry visual_art Electric field visual_art.visual_art_medium Ceramic Lead titanate DC bias |
| Zdroj: | Journal of Physics D: Applied Physics. 35:1550-1554 |
| ISSN: | 0022-3727 |
| DOI: | 10.1088/0022-3727/35/13/316 |
| Popis: | Laser Doppler interferometry has been used to determine the strain and piezoelectric response of Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) electrostrictive ceramics as a function of electric fields up to 4 MV m-1, frequencies between 0.1 Hz and 2.5 kHz and DC bias fields up to 3 MV m-1. The strain and polarization of PMN-15 with a composition of 0.9PMN-0.1PT and PMN-38 with a composition of 0.85PMN-0.15PT both produced by TRS ceramics, have been measured at room temperature. The strain and polarization responses of PMN-15 ceramics under an electric field up to 4 MV m-1 have been fitted to a polynomial model. The results suggest that a quadratic dependence of strain on polarization is not valid for large electric fields and that higher-order terms must be included. Our measurements showed that the effective piezoelectric coefficient, d33, of PMN-15 ceramics had a maximum value of 800 pm V-1 at a bias field of 0.67 MV m-1 and had little frequency dependence in the frequency range from 1 Hz up to 2.5 kHz. PMN-38 ceramic showed a maximum d33 of 1200 pm V-1 at a bias field of 0.43 MV m-1 and the d33 of this material showed a clear frequency dependence from 1 Hz up to 2.5 kHz. |
| Databáze: | OpenAIRE |
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