METHOD FOR CONTINUOUS PREPARATION OF NANOMETER-SIZED HYDROUS ZIRCONIA SOL USING MICROWAVE

摘要

PURPOSE: A method for preparing continuously a nano-sized zirconia hydrate sol is provided, to obtain a sol where a spherical zirconia hydrate particle having an average diameter of about 1-250 nm is dispersed. CONSTITUTION: The method comprises the steps of continuously supplying a 0.001-0.2 M zirconium salt aqueous solution(3a) into the reaction pipe(2) of a reactor(1) comprising at least one reaction pipe, and applying microwave inside the reactor to allow the zirconium salt aqueous solution to be heated itself in flowing state to obtain a zirconia hydrate sol(6). Preferably the cross-section of the reaction pipe is circle or concentric circle, and the zirconium salt aqueous solution is heated at a temperature of 70-100 deg.C inside the reactor by using an additional heating means other than microwave.