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* Welcome To PMNT Crystal *
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PMNT

PMNT is one of relax ferroelectric single crystals and used as the probe in medical B-type ultrasonic transducers. In comparison with the conventional PZT series piezoelectric ceramics, it enhances greatly the resolution of and broadens the bandwidth of medical B-type ultrasonic transducers, and now is attracted more and more attention in the international ferroelectric field. Whats more, it will be applied noticeably to nondestructive defect inspections, sonar and solid actuators as well.

 

Physical properties:

Chemical Composition

( PbMg0.33 Nb 0.67 )1-x(PbTiO3 )x

Structure

R3m, Rhombohedral

Lattice

a0 ~ 4.024(pseudo-cubic, varies with composition )

Melting Point

1280C

Density

8.1 g/cm3

Piezoelectric Coefficient d33

>2000 pC/N

Coupling Constant k33 (longitudinal mode)
kt (thickness mode)
k33 (beam mode)

>92%
59-62%
84-88%

Dielectric Constant ε(at 1kHz after poling)

4000 6000

Dielectric loss

tand<0.9

Composition

near the morphotropic phase boundary

Curie temperature

135-150C

Standard size

15 15 1mm3 plates along [001],
and other sizes are available on request

   

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