Mechanochemical synthesis of nanosized lead titanate powders from mixed oxides

Nanosized lead titanate (PT) powders have been successfully prepared via a novel mechanochemical synthesis route, which skips the phase-forming calcin ation at a temperature in the range of 700 degrees C to 800 degrees C that is always required for the solid state reaction. The novel fabrication tech nique uses the low-cost and widely available oxide powders as the starting materials, and the formation of designed PT perovskite phase is triggered b y mechanical activation instead of calcination at an elevated temperature. Upon mechanochemically activation for more than 10 h, a well dispersed powd er consisting of PT particles of 20-30 nm in size was obtained. (C) 1999 El sevier Science B.V. AU rights reserved.