DocumentCode :
3503715
Title :
RF-induction plasma synthesis of CeO/sub 2/-based fine powders for SOFC electrolytes
Author :
Castillo, Ismael ; Munz, R.J.
Author_Institution :
Plasma Technol. Res. Centre, McGill Univ., Montreal, Que., Canada
fYear :
2004
fDate :
1-1 July 2004
Firstpage :
219
Abstract :
Summary form only given. Doped CeO/sub 2/-based ceramics are the most promising substitute for the existing YSZ (yttria stabilized zirconia) as the electrolyte material for SOFCs (solid oxide fuel cells). Cerium oxide fine powders doped with different amounts of Gd, Sm and Y were synthesized from nitrate salts dissolved in water using a radio-frequency inductively coupled plasma reactor. An atomization probe was used to inject the solutions into the system, which was operated under vacuum using argon and oxygen as central and sheath gases, respectively. The effect of plasma operating parameters on particle synthesis was also investigated. Particle Ce and dopant composition was determined qualitatively using energy dispersive spectroscopy (EDS). X-ray diffraction measurements demonstrated that the amount of dopant for a given dopant did not affect the basic CeO/sub 2/ crystalline lattice. Measurements of crystal size by peak broadening suggested that dopant additions retarded crystal growth. SEM micrographs showed three different types of particles and size distribution ranges that were later confirmed using laser diffraction to measure particle size.
Keywords :
X-ray chemical analysis; X-ray diffraction; ceramics; cerium compounds; crystal structure; dissolving; doping profiles; gadolinium; particle size; plasma materials processing; powder technology; powders; samarium; scanning electron microscopy; solid electrolytes; solid oxide fuel cells; yttrium; CeO/sub 2/-based fine powders; CeO/sub 2/:Gd; CeO/sub 2/:Sm; CeO/sub 2/:Y; EDS; RF-induction plasma synthesis; SEM; SOFC electrolytes; X-ray diffraction; YSZ; ceramics; crystal size; crystalline lattice; dissolving; dopant composition; energy dispersive spectroscopy; laser diffraction; particles distribution; plasma operating parameters; radio-frequency inductively coupled plasma reactor; sheath gases; size distribution; solid oxide fuel cells; yttria stabilized zirconia; Ceramics; Cerium; Crystallization; Fuel cells; Plasma materials processing; Plasma measurements; Plasma sheaths; Powders; Size measurement; Solids;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. The 31st IEEE International Conference on
Conference_Location :
Baltimore, MD, USA
ISSN :
0730-9244
Print_ISBN :
0-7803-8334-6
Type :
conf
DOI :
10.1109/PLASMA.2004.1339820
Filename :
1339820
Link To Document :
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