Stable suspensions of doped ceria nanopowders for electrophoretic deposition of coatings for solid oxide fuel cells / Kalinina E. G.,Samatov O. M.,Safronov A. P. // INORGANIC MATERIALS. - 2016. - V. 52, l. 8. - P. 858-864.

ISSN/EISSN:

0020-1685 / 1608-3172

Type:

Article

Abstract:

We have studied nonaqueous suspensions of Ce0.8Sm0.2O1.9 (CSO), Ce0.8Gd0.2O1.9 (CGO), and DD mu(0.8)(Sm0.75Sr0.2Ba0.05)(0.2)O2-delta (CSSBO) nanopowders produced by laser evaporation of a target. The nanoparticles were nearly spherical in shape and their average diameter was 9, 7, and 15 nm, respectively. Using ultrasonic processing, we obtained stable nanopowder suspensions in an isopropanol + acetylacetone mixed medium, investigated their particle size composition, evaluated their zeta potential as a function of pH, and obtained potentiometric titration curves. The starting nanopowder suspensions have been shown to be weakly acidic and have a rather high initial zeta potential. During titration of the nanopowder suspensions with 0.17 N KOH in isopropanol, no isoelectric point was observed. The maximum positive values of the zeta potential, favorable for electrophoretic deposition (EPD), were reached in weakly acidic media in the pH range 4-6. Using EPD, we obtained a coating from a stable self-stabilized CSSBO suspension (zeta = +31 mV, pH 4.0), which was then sintered in air at a temperature of 1400A degrees C. Our results demonstrate that the starting nonaqueous suspensions of the CSO, CGO, and CSSBO nanopowders suit well for producing gas-tight, homogeneous solid oxide fuel cell coatings by EPD.

Author keywords:

nanopowders; zeta potential; electrophoretic deposition ELECTROLYTE FILMS; STABILIZATION; NANOPARTICLES

DOI:

10.1134/S0020168516080094

Web of Science ID:

ISI:000379866000017

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1608-3172
Keywords-Plus	ELECTROLYTE FILMS; STABILIZATION; NANOPARTICLES
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	kalinina@iep.uran.ru
ResearcherID-Numbers	Kalinina, Elena/F-1587-2017
ORCID-Numbers	Kalinina, Elena/0000-0002-5637-7451
Funding-Acknowledgement	Russian Foundation for Basic Research {[}16-03-00025-a]; Russian Federation President's Scholarship {[}SP-536.2015.1]; Russian Federation Ministry of Education and Science {[}0389-2014-0002]
Funding-Text	This work was supported by the Russian Foundation for Basic Research (project no. 16-03-00025-a), Russian Federation President's Scholarship (grant no. SP-536.2015.1), and the Russian Federation Ministry of Education and Science (state research target no. 0389-2014-0002).
Number-of-Cited-References	20
Usage-Count-Last-180-days	6
Usage-Count-Since-2013	17
Journal-ISO	Inorg. Mater.
Doc-Delivery-Number	DR4IW