| 摘要 |
PURPOSE: Provided is a preparation method of nano-sized PZT(Pb(Zr, Ti)O3) powder using a continuous hydrothermal reactor which enables the feeding of raw materials, reacting and discharging as a chain of processes. Therefore, the method shortens the processes and produces PZT powder in a large quantity. CONSTITUTION: The nano-sized PZT(Pb(Zr, Ti)O3) powder using a continuous hydrothermal reactor is prepared by the following steps of: feeding raw materials, such as Pb(OH)2, Pb(NO3)2, Zr(OH)4, ZrOCl28H2O, TiCl4, TiO2 and NaOH(or KOH), into dual-structured reaction chambers resistant to corrosion, high temperature and high pressure; heating and stirring a mixture; hydrothermal reacting at 200deg.C for 2hrs, wherein the reaction chambers are heated with hot oil, the temperatures of the reactants and hot oil are detected, and overheated oil is cooled with cold water; reacting unreacted materials again; discharging formed materials from the reaction chambers; filtering; and washing. The prepared PZT powder has 1-10micrometer size and more than 99.99% of purity.
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