The effect of electrolyte conductivity on electrophoretic deposition

Stappers, Linda; Zhang, L.; Biest, Omer Van der; Fransaer, Jan

doi:10.1016/j.jcis.2008.09.022

Cited by 57 publications

(75 citation statements)

References 26 publications

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“…This type of process deagglomeration of the alumina particles has been widely used by several authors [16,17,20,21,24]. Preparation with high shear mixer (HSM) is also increasingly used in particular for dispersion of nanoclays [32,33].…”

Section: Mixing Equipment On Dispersionmentioning

confidence: 99%

“…The bridging effect also increases with the reduction of the particle size. Several studies reported the use of small molecules such as ascorbic acid [11], citric acid [17,18], or nitric acid [19][20][21] for the dispersion of alumina particles. The adsorption of the molecules occurs between its ionic functional group and the charged oxide of the alumina particle through a ligand exchange process [8,11].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Alumina Slurry for Oxide-Oxide Ceramic Composites Manufactured by Injection Molding

Billotte

Fotsing

Ruiz

2017

Advances in Materials Science and Engineering

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This paper focuses on the rheological study of an alumina suspension intended for the manufacturing of oxide-oxide composites by flexible injection. Given the production constraints, it is required to have stable suspension with low viscosity and a Newtonian behavior. This is achieved with a concentration of nitric acid between 0.08 wt% and 0.2 wt% and amount of 3 wt% of PVA binder. The maximum loading of the suspension of 47 vol% suggests that there is no structure development within the suspension with optimized concentration of acid and PVA.

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Section: Mixing Equipment On Dispersionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of Alumina Slurry for Oxide-Oxide Ceramic Composites Manufactured by Injection Molding

Billotte

Fotsing

Ruiz

2017

Advances in Materials Science and Engineering

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“…An ideal MEA fabrication method should be reproducible, fast and up scaling should be possible [7]. EPD is a highly efficient process for the production of films and coatings; it is easy to implement, low cost, fast and applicable to a wide variety of materials [8]. EPD is achieved via the motion of charged particles, suspended in a liquid, towards an electrode under the influence of an applied electric field (electrophoresis).…”

Section: Introductionmentioning

confidence: 99%

Optimisation of electrophoretic deposition parameters for gas diffusion electrodes in high temperature polymer electrolyte membrane fuel cells

Jao

Pasupathi

Pollet

2013

Journal of Power Sources

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Felix, C. et al. (2013). Optimisation of electrophoretic deposition parameters for gas diffusion electrodes in high temperature polymer electrolyte membrane fuel cells. AbstractElectrophoretic deposition (EPD) method was used to fabricate gas diffusion electrodes (GDEs) for high temperature polymer electrolyte membrane fuel cells (HT PEMFC). Parameters related to the catalyst suspension and the EPD process were studied. Optimum suspension conditions are obtained when the catalyst particles are coated with Nafion ® ionomer and the pH is adjusted to an alkaline range of about 8 e10. These suspensions yield good stability with sufficient conductivity to form highly porous catalyst layers on top of the gas diffusion layers (GDLs). GDEs were fabricated by applying various electric field strengths of which 100 V cm -1 yields the best membrane electrode assembly (MEA) performance. Compared to an MEA fabricated by the traditional hand sprayed (HS) method, the EPD MEA shows superior performance with a peak power increase of about 73% at similar platinum (Pt) loadings. Electrochemical Impedance Spectroscopy (EIS) analysis shows lower charge transfer resistance for the MEA fabricated via the EPD method compared to the HS MEA. The EPD GDE exhibits a greater total pore area (22.46 m 2 g -1 ) compared to the HS GDE (13.43 m 2 g -1 ) as well as better dispersion of the Pt particles within the catalyst layer (CL).

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“…Hence, the conductivity must be determined for a particular system. The effect of conductivity of alumina-ethanol suspensions on EPD was studied by Stappers et al [24], who claimed that high conductivity suspensions result in more uniform deposits than the low conductivity suspensions. This was attributed to the decrease in electric field over suspension as a result of the alumina deposit resistance.…”

Section: ζ-Potential and Conductivitymentioning

confidence: 99%