0.9PMN-0.1PT ceramics as adaptative material

0.9PbMg(1/3)Nb(2/3)O(3)-0.1PbTiO(3) bulk ceramics strains induced by the ap plication of a variable electric field (0 to 1 kV/mm) and a compressive str ess (5 to 40 MPa) are reported at different temperatures from 8 degrees C t o 45 degrees C. The field-induced strain curves versus the stress exhibit a non linear behavior which is more pronounced for high electric fields and/ or low temperatures. It can be described by polynomial laws of the strain a s a function of stress and electric held x(T)(E, X) = Sigma i(Sigma jM(ij)( T).E-j). X-i with i = 0...2 and j = 0...3, which the coefficients M-ij dire ctly depend on the temperature. Consequently, it is shown that the dynamic elastic compliance of the material is a function of the electric held, comp ressive stress and temperature. This behavior has been attributed to the se nsitivity of the nanostructure of the material to these different parameter s: the growth of compliant polar clusters distributed in a paraelectric mat rix is induced by decreasing temperature or increasing electric held and is inhibited by the application of a compressive stress. Finally, as 0.9PbMg( 1/3)Nb(2/3)O(3)-0.1PbTiO(3) bulk ceramics are characterized by an adaptativ e electromechanical behavior, their potential interest as active vibration control is discussed.