K83

Modified lead metaniobate

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Offering a Curie temperature reaching 200°C, K-83 is an excellent choice for non-destructive evaluation contact transducers.  This piezoelectric material supports applications at 2MHz and above. 
 
Symbol Property Spec   Symbol Property Spec
KT3 Relative dielectric permittivity at 1 kHz 185   KS3   150
k33 Longitudinal coupling coefficient 0.42   k15 Shear coupling coefficient 0.25
kt Thickness coupling coefficient 0.41   kp Coupling factor 0.18
k31   0.12   d33 Piezoelectric charge coefficient 56
dh   26   d15 Piezoelectric strain constant 54
d31 Piezoelectric strain constant -15   g33 Piezoelectric voltage constant 34
g15 Piezoelectric voltage constant 22   g31 Piezoelectric voltage constant -9
Tc Curie temperature 200   Y33E
1011N/m2
  13.0
S33E
10-12m2/N
 
  0.77   S11E Elastic compliance under E=0,10-13 m2/ N n/a
QEM,T Mechanical quality factor 700   tanδ Dielectric loss factor 2.0
Nt Thickness mode resonance frequency constant 2690   N33   n/a
Np Radial mode resonance frequency constant 3440   N31   n/a
N15 Shear mode resonance frequency constant 1700   ρ Density 4.6
VL   5420   VS   3350
ZL Compressional acoustic impedance under E=0 24   α   1.5
  Max. recommended working range     KT(S)3 Longitudinal free (clamped) dielectric constant (150) 185
KT(S)1 Transverse free (clamped) dielectric constant (260) 277   kp(k31) Planar coupling coefficient (0.12) 0.18
kt/kp Piezoelectric anisotropy 2.3   d33(dh) Piezoelectric strain (isotropic) constant (26) 56
CD33 Elastic stiffness under D=0, GPa 162   σρ Planar poisson coefficient 0.22
QM,T Thickness mode quality factor 700   Qm,p Planar mode quality factor 900
VL(VS) Longitudinal (shear) sound velocity under E=0 (3.35) 5.42   Acoustic impedance n/a
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