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Dense, bubble-free ceramic deposits from aqueous suspensions by electrophoretic deposition

  • Tetsuo Uchikoshi (a1), Kiyoshi Ozawa (a1), Benjamin D. Hatton (a1) and Yoshio Sakka (a1)

Abstract

The characteristics of electrophoretic deposition (EPD) of positively charged particles onto a cathode were investigated using aqueous alumina and zirconia suspensions. The deposition was performed using several kinds of metal substrates at different current densities. For most substrate materials, a large number of macropores appeared in the deposit, and their size increased with the current density due to gas bubble formation. However, no macropores were formed in the deposit on a palladium substrate, regardless of the current density. The green density and sintering properties of the EPD deposits on a palladium substrate from aqueous suspensions were the same as from slip casting. Bubble-free zirconia/alumina laminate composites were also fabricated by EPD from aqueous suspensions.

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Dense, bubble-free ceramic deposits from aqueous suspensions by electrophoretic deposition

  • Tetsuo Uchikoshi (a1), Kiyoshi Ozawa (a1), Benjamin D. Hatton (a1) and Yoshio Sakka (a1)

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