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Characteristic Properties of KNN-Lead-Free Piezoelectric Ceramics, Compared with Commercial, Hard PZTs.
| Material | TC (°C) | TO-T/Td (°C) | loss | Pr (C/m2) | EC (kV/cm) | Ei (kV/cm) | d33 (pC/N) | k33 | Q | ρ(g/cm3) | v3D (m/s) | Z (MRayl) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KNN-KCN | 410 | 188 | 292 | 0.6% | 0.21 | 11.6 | 5 | 90 | 0.55 | 1500 | 4.4 | 6250 | 27.5 | |
| KNN (HP)14 | 420 | 195 | 496 | 1.5% | 0.33 | 5.0 | — | 127 | 0.61 | 240 | 4.4 | 6930 | 30.5 | |
| PZT4 | 328 | — | 1300 | 0.4% | 0.36 | 14.2 | 3 | 289 | 0.70 | 500 | 7.6 | 4570 | 34.7 | |
| PZT8 | 300 | — | 1000 | 0.4% | 0.27 | 19.0 | 7 | 225 | 0.64 | 1000 | 7.6 | 4600 | 35.0 |
