Linked Life Data

21137752

Source:http://linkedlifedata.com/resource/pubmed/id/21137752

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2010-12-8
pubmed:abstractText
Doped ceria has been considered for high oxygen ion conductivity for solid oxide fuel cells. In the present study, 20 mole% samarium doped nano ceria powder was prepared by wet chemical synthesis and sintered at different temperatures to retain submicron grains (> 92-96% density). ionic conductivity of the sintered pellets was measured using impedance spectroscopy as a function of temperature (200-800 degrees C). The total maximum conductivity was 1.0 x 10(-2)S.cm(-1) (at 600 degrees C) for samples sintered at 1200 degrees C. The activation energy at higher test temperature decreases with the decrease in the sintering temperature (by 25%). The grain boundary, grain interior conductivity and activation energy of the electrolyte were correlated to the resulting microstructure. It has been demonstrated that use of doped nano ceria powder as precursor not only reduced the sintering temperature but also provided segregation free grain boundary for engineering higher conductivity dense electrolytes.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Oct
pubmed:issn
1533-4880
pubmed:author
pubmed:issnType
Print
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
6495-503
pubmed:year
2010
pubmed:articleTitle
Effect of submicron grains on ionic conductivity of nanocrystalline doped ceria.
pubmed:affiliation
Surface Engineering and Nanotechnology Facility, Advanced Materials Processing and Analysis Center (AMPAC), Mechanical Materials Aerospace Engineering, Engineering Building, Room #381, PO Box 162455, University of Central Florida, Orlando, FL 32816, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.