Pmn-PT Crystal

PMN-PT Crystal

 

 

The lead magnesium niobate-lead titanate (PMN-PT) crystal is a new generation of piezoelectric materials. The chemical structural formula of PMN-PT is (1-x)[Pb(Mg1/3Nb2/3)O3]-x[PbTiO3].The PMN-PT is formulated to exhibit high piezoelectric coefficient, large electric-mechanical coupling coefficient, high dielectric constants and low dielectric losses. As a rule, the piezoelectric coefficient is higher than PZT ceramics, which results in improving bandwidth, sensitivity and source level in applications.
We could provide high quality PMN-PT crystals with the diameter of 2 inches for a broad range of applications.

Typical Capability of PMN-PT [001]

The application of Vibration
  • Radial Extension
  • Longitudinal Extension
  • Transverse Extension
  • Longitudinal Shear
  • Transverse Shear
  •  

    Electrodes

    Ag 0.07um

    Au (Cr or Ni/Au/Ag/Au) 1000-10000

    Pt 0.07um

     

    Reference Capability of PMN-PT Crystal
    Properties Dependence on Crystallographic Direction of PMN-PT Crystal
    These typical values are provided for design information only. Standard tolerances are approximately+/-20% of these values. Material properties are measured according to standard IEEE and DOD definitions and measuring techniques. All data shown represent nominal characteristics (20 ℃) 24 hours after polarization.

    PMN-PT Specifications:

    极化/测量方向

    [110]

    [010]

    [100]

    [001]

    [011]

    [111]

    密度

    ρ (g/cm 3 )

    8.1

    8.1

    8.1

    8.1

    8.1

    8.1

    耦合系数Kt

    -

    0.60

    0.60

    0.61

    -

    -

    耦合系数Kp

    -

    0.92

    0.95

    0.90

    -

    -

    泊松比σ E

    -

    0.16

    0.27

    0.27

    -

    -

    介电系数ε T

    4000-7000

    4500-7000

    4500-7000

    4500-7000

    4000-7000

    3500-6500

    损耗tgδ%

    0.13

    0.40

    0.75

    0.42

    0.32

    0.13

    压电常数d 33

    800-1200

    1500-2100

    1500-2100

    1500-2100

    800-1200

    200-400

    机械Q M

    -

    33

    68

    31

    -

    -

    其他方向

    -

    <b>  <c>

    [100][001]

    <b>  <c>

    [001][100]

    <b>  <c>

    [010][001]

    <b>  <c>

    [001][010]

    <b>  <c>

    [010][100]

    <b>  <c>

    [100][010]

    -

    -

    耦合系数K 31

    0.58

    0.72

    0.71

    0.77

    0.78

    0.62

    0.60

    0.48

    0.32

    S 11 E (×10 12  m2 /N)

    -

    40.37

    32.55

    28.76

    31.12

    50.50

    54.29

    -

    -

    介电常数ε T

    4000-7000

    4900

    4200

    4100

    4200

    5000

    4900

    4000-7000

    3500-6500

    d 31 (×10 12pc/N)

    -420

    -930

    -745

    -735

    -790

    -920

    -910

    -410

    -250

     

     

     

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