Abstract
MnO-doped 0.97K0.5Na0.5NbO3-0.03(Bi0.5K0.5)TiO3lead-free piezoelectric ceramics have been fabricated by solid state reaction. The MnO-doped KNN-BKT samples show tetragonal perovskite structure and the grain size increases obviously. With an addition of the optimal doping of MnO, all the electrical properties of the samples, especially the piezoelectric and pyroelectric performance, have been enhanced significantly. The KNN-BKT ceramics, with 0.8 wt% MnO doping, exhibits optimal electrical properties: d33= 221 pC/N, kp= 44.7%, tgδ = 1.4%, εr= 1229, Qm= 143, ρ = 4.464 g/cm3and p = 221 μC/m2K.
Original language | English |
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Pages (from-to) | 323-326 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 506 |
Issue number | 1 |
DOIs | |
Publication status | Published - 10 Sept 2010 |
Keywords
- Electric properties
- Lead-free piezoelectric ceramics
- MnO doping
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry