2000 年 12 巻 3 号 p. 309-315
The electromechanical responses of 0.9PMN-0.1PT ceramics are reported in different conditions, i.e. under variable electric field (static or dynamic), compressive stress and temperature. The resulting strain characteristics are well fitted in terms of an hyperbolic tangent formulation. The apparent elastic compliance and piezoelectric coefficient, deduced from this expression, are strongly dependent on the different environmental parameters (electric field, compressive stress and temperature), which underlines the adaptive behavior of 0.9PMN-0.1PT ceramics. This one results from the sensitivity of the nanostructure of these ceramics, corresponding to the development of compliant polar domains with increasing electric field, decreasing compressive stress and temperature. Moreover, the adaptive character of 0.9PMN-0.1PT ceramics is essential in regards to development of intelligent structures with numerous applications in different fields (automotive, aeronautic, medical, home automation, ..). In particular, the potentialities of this material for active damping applications is introduced, and other promising routes to integrate 0.9PMN-0.1PT material in intelligent structures are suggested.
