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Electrophoretic Deposition Behavior of Aqueous Nanosized Zinc Oxide Suspensions
Author(s) -
Tang Fengqiu,
Uchikoshi Tetsuo,
Sakka Yoshio
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00428.x
Subject(s) - electrophoretic deposition , dispersant , chemical engineering , materials science , zeta potential , flocculation , rheology , aqueous solution , polyelectrolyte , polyethylenimine , nanoparticle , deposition (geology) , zinc , suspension (topology) , polymer , dispersion (optics) , chemistry , composite material , nanotechnology , metallurgy , organic chemistry , coating , mathematics , transfection , optics , engineering , biology , paleontology , biochemistry , homotopy , physics , sediment , pure mathematics , gene
The rheological behavior and electrophoretic deposition (EPD) of ZnO nanopowder (nano‐ZnO) in aqueous media have been described. A cationic polyelectrolyte (polyethylenimine, PEI) was used to disperse and modify the surfaces of the ZnO nanoparticles. The rheological properties of the ZnO aqueous suspension were investigated by measuring the viscosity versus the pH and amount of dispersant. The EPD processing was conducted via cathodic electrodeposition, using stable suspensions with low viscosity, and the depositional behavior was investigated. Bubble‐free nano‐ZnO deposits with uniform microstructures were successfully obtained, which was an indication of good sintering behavior.