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.

Crystal Type A B

Orientaion of poling <001> <001>

Dieletric Constant 4000-5500 5000-7500

δ < 0.01 < 0.01

Kt 0.6 0.6

Kp 0.9 0.9

Tc 145℃±3℃ 148℃±3℃

d33(pc/N) 1300-1800 1700-2400

Electrodes supplying: Au（Cr or Ni/Au Ag/Au), Ag, Pt