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Surface Modification of Complex Oxide Powder with Polyelectrolyte Layers Improving EPD Characteristics

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Abstract:

The surface modification of Gd doped ceria (GDC) and Sr-and Mg-codoped lanthanum gallate (LSGM) powders with cationic and anionic polyelectrolytes, Poly (diallyldimethylammonium chloride) (PDDA) and poly (2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS), respevtively, was performed by the Layer by Layer (LbL) adsorption method to improve the surface-charging uniformity. The tri-layer of GDC/LSGM/GDC was deposited on a polypyrrole coated porous NiO-YSZ substrate by sequential EPD using the ethanol-based suspensions of the surface-modified powders. The topcoating of hydroxyl-propyl cellulose (HPC) on the deposited layers was conducted to control the drying rate with suppressing the cracking and peeling-off of the deposits. The advantage of the use of those polymers for the EPD process including the drying technique was demonstrated.

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Periodical:

Key Engineering Materials (Volume 654)

Pages:

255-260

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.654.255

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Online since:

July 2015

Authors:

Tetsuo Uchikoshi*, Eiji Eto, Harue T. Suzuki, Chika Matsunaga, Kiyoshi Kobayashi, Tohru S. Suzuki, Hiroyuki Muto, Atsunori Matsuda

Keywords:

GDC, Layer by Layer Adsorption, LSGM, Polyanion, Polycation

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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