Premium
A Mathematical Description of the Kinetics of the Electrophoretic Deposition Process for Al 2 O 3 ‐Based Suspensions
Author(s) -
Anné Guy,
Vanmeensel Kim,
Vleugels Jef,
Van der Biest Omer
Publication year - 2005
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.1551-2916.2005.00387.x
Subject(s) - electrophoretic deposition , electric field , deposition (geology) , electrophoresis , suspension (topology) , yield (engineering) , electrical resistivity and conductivity , chemistry , drop (telecommunication) , analytical chemistry (journal) , conductivity , chemical engineering , materials science , chromatography , nanotechnology , composite material , electrical engineering , coating , physics , paleontology , mathematics , engineering , quantum mechanics , sediment , homotopy , pure mathematics , biology
The yield during electrophoretic deposition is modeled incorporating the changing electric field over the suspension, due to a potential drop over the growing deposit, assessed from on‐line measurements of the current flowing through the deposition cell and the conductivity of the suspension during electrophoretic deposition. The kinetic model is validated for Al 2 O 3 suspensions with different powder loads based on methylethylketone with n ‐butylamine and ethanol with polyethyleneimine or HNO 3 , suspensions with, respectively, a constant and a decreasing electric field during deposition. The need for a powder concentration correction, even at volume fractions down to 0.03, and the incorporation of a changing electric field is experimentally proven to be essential in order to describe the deposition yield more accurately than predicted from the Hamaker equation.