NDLI: Combustion synthesis of sm0.5sr0.5coo3-x and la0.6sr0.4coo3-x nanopowders for solid oxide fuel cell cathodes

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Combustion synthesis of sm0.5sr0.5coo3-x and la0.6sr0.4coo3-x nanopowders for solid oxide fuel cell cathodes

Content Provider	NASA Technical Reports Server (NTRS)
Author	Zhong, zhimin Bansal, Narottam P.
Copyright Year	2005
Description	Nanopowders of Sm0.5Sr0.5CoO(3-x) (SSC) and La0.6Sr0.4CoO(3-x) (LSC) compositions, which are being investigated as cathode materials for intermediate temperature solid oxide fuel cells, were synthesized by a solution-combustion method using metal nitrates and glycine as fuel. Development of crystalline phases in the as-synthesized powders after heat treatments at various temperatures was monitored by x-ray diffraction. Perovskite phase in LSC formed more readily than in SSC. Single phase perovskites were obtained after heat treatment of the combustion synthesized LSC and SSC powders at 1000 and 1200 C, respectively. The as-synthesized powders had an average particle size of ~12 nm as determined from x-ray line broadening analysis using the Scherrer equation. Average grain size of the powders increased with increase in calcination temperature. Morphological analysis of the powders calcined at various temperatures was done by scanning electron microscopy.
File Size	8639163
Page Count	17
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20050216396
Archival Resource Key	ark:/13960/t0ms8pq01
Language	English
Publisher Date	2005-08-01
Access Restriction	Open
Subject Keyword	Combustion Synthesis Scanning Electron Microscopy Heat Treatment Solid Oxide Fuel Cells Cobalt Oxides Nitrates Perovskites Powder Particles Glycine X Ray Diffraction Strontium Chemical Composition Samarium Lanthanum Microstructure Nanotechnology Cathodes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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