Forming and microstructure control of ceramics by electrophoretic deposition (EPD)

Abstract

Electrophoretic deposition (EPD) is one of the colloidal processes during in ceramic production and has gained significant interest because of the high versatility of its use with different materials including nanopar ticles and its cost-ef fectiveness requiring simple equipment. Of the major parameters for ceramic processing involving the EPD, preparation of the suspensions and application methods of electric fields are particularly important factors that affect the microstructure. At the beginning of this review, we introduce the fundamental aspects of the EPD processing. We then focus on the following four points: (1) the stability of the Pb(Zr,Ti)O2/ethonol suspension by theaddition of phosphate esters and its influence on the infsequent EPD process, (2) the stability y of aTiO2/(2-propanal+2.4-pentanedione) suspension, which is a suspension without dispersants, (3) the film performance of the pulsed direct current EPD using an aqueous suspension, and (4) the laminated textured ceramics by EPD in a strong magnetic field. © 2010 Hosokawa Powder Technology Foundation.