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PZT Powder of P-44 Navy Type II Hard Material for Transmittering
| The material performance of piezoelectric ceramic | ||||||||||
| Num | Name of Performance parameter | symbol | index | Allow the public errand | ||||||
| P-33 | P-44 | P-51 | P-81 | |||||||
| 1 | Electromechanical coupling coefficient | Kp | 0.60 | 0.60 | 0.65 | 0.53 | ±6.0% | |||
| K31 | 0.36 | 0.36 | 0.38 | 0.31 | ||||||
| K33 | 0.70 | 0.70 | 0.74 | 0.63 | ||||||
| K15 | 0.70 | 0.70 | 0.72 | 0.66 | ||||||
| Kt | 0.47 | 0.48 | 0.50 | 0.47 | ||||||
| 2 | The relative electric capacity rate of freedom |
| 1725 | 1350 | 2100 | 1025 | ±12.5% | |||
| 1725 | 1900 | 2400 | 1400 | ||||||
| 3 | The medium losses | tgδ | 0.020 | 0.005 | 0.020 | 0.004 | ≤ | |||
| 4 | The gentle and agreeable constant of elasticity (x10-12m2/N) |
| 15 | 13 | 15 | 11.0 | ±10% | |||
| 9.0 | 8.5 | 9.0 | 8.5 | ||||||
| 25 | 21.5 | 22.0 | 21.0 | ||||||
| 5 | Piezoelectricity meet an emergency the constant (x10-12m/v或C/N) | d31 | 160 | -150 | -210 | -100 | ±12.5% | |||
| d33 | 390 | 320 | 450 | 225 | ||||||
| d15 | 480 | 530 | 710 | 450 | ||||||
| 6 | Mechanical cue | Qm | 75 | 400 | 70 | 800 | ≥ | |||
| 7 | Frequency constant (Hz•m) | Nd | 1950 | 2200 | 2000 | 2300 | ±5% | |||
| N1 | 1470 | 1600 | 1450 | 1700 | ||||||
| N3 | 1880 | 2000 | 1900 | 1960 | ||||||
| N5 | 1130 | 1230 | 1200 | 1230 | ||||||
| Nt | 2250 | 2300 | 2250 | 2280 | ||||||
| 8 | The velocity of sound (m/s) | Vd | 3000 | 3300 | 3000 | 3500 | ±5% | |||
| V1 | 2940 | 3200 | 2900 | 3400 | ||||||
| V3 | 3760 | 4000 | 3800 | 3920 | ||||||
| V5 | 2260 | 2460 | 2400 | 2460 | ||||||
| Vt | 4500 | 4600 | 4500 | 4560 | ||||||
| 9 | Density (x103kg/m3) | ρ | 7.6 | 7.5 | 7.45 | 7.45 | ≥ | |||
| 10 | Curie's temperature (℃) | Tc | 335 | 300 | 260 | 300 | ≥ | |||
| 11 | Rate of change of time of ten times (%) | ANd | 0.20 | 1.2 | 0.35 | 1.3 | ||||
| AKp | -0.25 | -1.8 | -0.4 | -2.0 | ||||||
| Aε | -1.5 | -4.0 | -1.5 | -4.0 | ||||||
| 12 | The relative rate of change of temperature (%)-10℃~50℃ The datum 25℃ | ΔNd/N | 1.0 | 1.0 | 1.5 | 1.5 | ||||
| Δε/ε | 15 | 9.0 | 20 | 9.0 | ||||||
| 13 | The strong field lies between electric performance T=25℃ E=400V | tgδ | 0.04 | 0.01 | ≤ | |||||
| Δε/ε | 0.17 | 0.06 | ≤ | |||||||
| note: 1, Index besides Curie's temperature, is the measurement value for ten days after polarizing for the performance parameter index in the form . | ||||||||||
