| The hydrothermal preparation process of fine PZT powder in a 2 liters autoclave with the precusors of Pb(OH)_2,ZrO(OH)_2 and TiO(OH)_2 was described in this paper.The effect of the alkali concentrations,tempera-tures and time as the main variables,on the hydrothermal process was stu died and discussed. Fine PZT polvder was successfullY synthesized under the conditions of200C and lcss,2 mol/LKOH and 2 hours.The examination resu1ts of XRD,SEM and TBM show that the PZT powder is a kind of cubic crystallite with an average diameter less than 0.3 microns and has good piezoelectricity value. |