Dielectric and electrostrictive properties of (1 – x) Pb(Mg1/3Nb2/3)O3−xPb(Mn2/3W1/3)O3 ceramics

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Abstract
The dielectric and electrostrictive properties of (1 - x) PMN−xPMW (x ⋚ 0.2) using chloride salts were investigated as a function of x. When the PMN-PMW powders were calcined at 700 °C for 1 h, the perovskite phase formed was 92%–97% at any given PMW composition (x ⋚ 0.2). With the increase of PMW content up to 0.2, the relative density of the specimens increased slightly, and the electrostrictive coefficient Q11 of the 0.8 PMN−0.2 PMW specimen increased about 6 × 10−2 m4/C2. However, the dielectric constant and electrostrictive strain of the specimens decreased despite the improved sinterability.