Room-temperature Preparation of Nano-sized Lanthanum-modified Lead-titanate Powder with a Perovskite Structure Fabricated by Using Mechano-chemical Technique

Many of the solid-state reaction or chemistry-based processing routes for functional ceramics inevitably involve a calcination process of the chemically-derived precursors at an intermediate/high temperature in order to form the designed ceramic phase. The purpose of this study is to directly synthesize a nano-sized lanthanum-modified lead-titanate (PLT) powder with a perovskite structure by using a high-energy mechano-chemical technique at room temperature. The nanocrystalline PLT was synthesized without any thermal treatment from an oxide powder or salts then, we investigated the chemical reaction, the phase transformation, and the crystalline structure for the mechanochemical procedures.This work was supported by the Energy Resources Technology Development Project of the Korea Energy Management Corporation and by grants-in-aid for the National Core Research Center Program from the Ministry of Education Science & Technology and Korea Science & Engineering Foundation (No. R15-2006-022-03001-0)