SYNTHESIS OF FUNCTIONAL CERAMIC MATERIALS FROM AQUEOUS-SOLUTIONS

Methods for synthesizing ceramic materials from aqueous solutions at o rdinary temperature and pressure are advantageous because of the appli cability to making films with wide areas and/or complicated shapes wit h no requirement of vacuum or high temperature, and because of lower c ost. Powder of ZrO2 or LnMeO(3) (Ln = La, Nd; Me = Cr, Mn, Fe, Co) per ovskite was dissolved in hydrofluoric acid and a solution of fluoro-co mplex ions was obtained. Boric acid was added to the solution, the flu oride ions were consumed by the formation of BF4-, and then the fluoro -complex ions were hydrolyzed to ZrO2 or LnMeO(3) in order to increase the amount of fluoride ions. A number of synthesized particles of ZrO 2 or LnMeO(3) were observed on the substrates in scanning electron mic roscope images.