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 application of a variable electric field (0 to 1 kV/mm) and a compressive stress (5 to 40 MPa) are reported at different temperatures from 8 degrees C to 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 as a function of stress and electric field 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 directly depend on the temperature. Consequently, it is shown that the dynamic elastic compliance of the material is a function of the electric field, compressive stress and temperature. This behavior has been attributed to the sensitivity of the nanostructure of the material to these different parameters: the growth of compliant polar clusters distributed in a paraelectric matrix is induced by decreasing temperature or increasing electric field 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 adaptative electromechanical behavior, their potential interest as active vibration control is discussed.