The Main Characteristics of Piezoelectric Ceramic Materials

Produced by Sino Sonics®
  • PZT8 and PZT4 are the common “hard” piezoceramic materials used in power ultrasonic transducers (e.g., welding, cutting, sonar, etc.).
  • PZT8 is perceived as the better choice for resonant devices, primarily due to its higher mechanical quality factor Qm. PZT8 is also considered a “harder” material compared to PZT4, since it has better stability at higher preloads and drive levels.
  • PZT4 is used in signal transmitting, it has clear advantages such as higher output (i.e., higher d33), mostly applications: sonar, underwater acoustic transmitter.
Parameters Symbols Materials
PT-A P-6C1 PZT-51A PZT-52A PZT-53A PZT-54A
Electro mechanical coupling coefficient kp 0.10 0.46 0.60 0.62 0.62 0.62
k31 0.06 0.34 0.37 0.38 0.38 0.38
k33 0.45 0.58 0.68 0.72 0.72 0.72
kt 0.45 0.40 0.45 0.48 0.48 0.48
Relative dielectric constant εT33
/ ε0		 350 1270 920 1900 2190 2530
Piezoelectric strain constant d33×10-12C/N 75 300 280 400 420 450
d31×10-12C/N -6.5 -120 -130 -200 -220 -230
Mechanical quality factor Qm 2000 1200 110 90 90 90
Frequency constant fr·d     kHz·cm 255 200 200 200 200 200
fr·l     kHz·cm 205 140 143 143 143 143
fr·t     kHz·cm 260 205 210 210 205 205
Temperature
characteristic		 | TKfr | (-20℃~80℃)
×10-6 / ℃		 30 35   400   400
| TKCT | (-20℃~80℃)
×10-6 / ℃		   50   2000   2000
Curie temperature Tc 400 280 290 280 280 280
Dielectric loss tgδ（%） 1.0 0.3 1.5 1.6 1.6 1.6
Dielectric loss（400V/mm） tgδ（400V/mm，%）            
Features and usage   High frequency resonator electro-acoustics, medical ultrasonic application electro-acoustics, medical ultrasonic application electro-acoustics, medical ultrasonic application electro-acoustics, medical ultrasonic application electro-acoustics, medical ultrasonic application
 
Parameters Symbols Materials
PZT-5B4 PZT-5C2 PZT-42 PZT-43 PZT-82  
Electro mechanical coupling coefficient kp 0.65 0.62 0.55 0.60 0.53  
k31 0.40 0.40 0.31 0.32 0.31  
k33 0.76 0.75 0.63 0.65 0.63  
kt 0.54 0.50 0.46 0.50 0.47  
Relative dielectric constant εT33
/ ε0		 3910 4770 1240 1580 1180  
Piezoelectric strain constant d33×10-12C/N 620 650 250 300 225  
d31×10-12C/N -300 -350 -120 -150 -100  
Mechanical quality factor Qm 60 50 500 1000 800  
Frequency constant fr·d     kHz·cm 200 190 225 215 230  
fr·l     kHz·cm 143 143 170 160 170  
fr·t     kHz·cm 190 185 195 216 228  
Temperature
characteristic		 | TKfr | (-20℃~80℃)
×10-6 / ℃		 300          
| TKCT | (-20℃~80℃)
×10-6 / ℃		 2000 4000   2500 2400  
Curie temperature Tc 250 220 320 350 300  
Dielectric loss tgδ（%） 2.5 3.0 0.3 0.3 0.3  
Dielectric loss（400V/mm） tgδ（400V/mm，%）     3.0 3.0 1.0  
Features and usage   electro-acoustics, medical ultrasonic application electro-acoustics, medical ultrasonic application high power transmissions, used for underwater sound transducer High stability, high power transmissions high power transmissions , used for ultrasonic cleaning and
welding