Elastic, Piezoelectric and Dielectric Properties of Pb(Mg 1/3 Nb 2/3 )O 3 -38%PbTiO 3 Single Crystal

The elastic, piezoelectric, and dielectric properties of Pb(Mg 1/3 Nb 2/3 )O 3 -38%PbTiO 3 (PMNT62/38) single crystals, poled along [001] of the original cubic axis, have been determined experimentally using the resonance technique. At room temperature, the PMNT62/38 single crystals have tetragonal symmetry. The Curie temperature is about 174°C, piezoelectric constant 300pC/N, and permittivity l 33 ∼ 734 and l 11 ∼ 4301. The electromechanical coupling coefficients k 33 is 84.6%, k t 60.8%, k 31 44.6% and k 15 45.9%.