DIELECTRIC AND ELECTROSTRICTIVE PROPERTIES OF (1-X)PB(MG1/3NB2/3)O3-XPB(MN2/3W1/3)O-3 CERAMICS

The dielectric and electrostrictive properties of (1 - x) PMN-xPMW (x less than or equal to 0.2) using chloride salts were investigated as a function of x. When the PMN-PMW powders were calcined at 700 degrees C for 1 h, the perovskite phase formed was 92%-97% at any given PMW composition (x less than or equal to 0.2). With the increase of PMW content up to 0.2, the relative density of the specimens increased slightly, and the electrostrictive coefficient Q(11) of the 0.8 PMN-0.2 PMW specimen increased about 6 x 10(-2) m(4)/C-2. However, the dielectric constant and electrostrictive strain of the specimens decreased despite the improved sinterability.