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MTI supplies high quality PMNT crystal for use in transducer and actuator devices. The new crystal was formulated to exhibit very large electromechanical coupling coefficients and also offers high dielectric constants and low dielectric losses.  Applications include high power sonar projectors, medical imaging, and actuators. The increased coupling and displacement results in improved bandwidth, sensitivity and source level in applications.Finished elements are available with lateral dimensions up to 1" (25 mm).  Electrodes are sputtered thin film nichrome/gold.

Typical Properties of PMNT


( PbMg0.33 Nb 0.67)1-x (PbTiO3)x    x= 0.28 -0.5

Crystal Structure & Lattice

R3m, Rhombohedral  a0 ~ 4.024?  (pseudo-cubic, varies with composition)

Melting Point

 1280 oC


 8.1        g/cm3

Piezoelectric Coefficient d33   

 >2000 pC/N

Coupling Constant

k33 >92%  kt 59-62%   k33?  84-88%

Dielectric Constant

4000 ? 6000  (at 1kHz after poling) 

Dielectric loss

< 0.9

Curie temperature 

135 -150 oC

 Max. Crystal size

 25x25 mm

Several standard PMTN substrates are listed below for ordering on-line. Please contact us for special size.



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3. The prices listed are subject to change without notice.