The sol-gel method is applied to the synthesis of Pb(Zr0.5Ti0.5)O-3 particles with various post treatments. After the reaction of Pb(OAc)(2), Zr(OBu)(4) and Ti(OEt)(4) in ethanol solvent at 73 degrees C over different reaction times, complex alkoxide is subjected to ammonia water and acetonitrile as a cosolvent at various water concentrations. The selection of reaction conditions enables the production of highly monodispersive particles with an average diameter less than 100 nm.