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Ceramic Interconnects with Low Sintering TemperatureCeramic interconnects for use in solid oxide he1 cells are expected to operate between 900 to approximately 1000 C, sinter below 1400 C to allow co-firing and meet a number thermal mechanical requirements. The pervoskite type (ABO3) lanthanum chromite based materials have emerged as a leading candidate that will meet these criteria by varying the composition on the A and B sites. A need therefore exists to determine this material's temperature dependent electrical and mechanical properties with respect to these site substitutions. In this investigation oxide powders were prepared by the glycine-nitrate process. Ionic substitutions were carried out on A sites with Ca or Sr, and B sites with Co and Al, respectively. Only stoichiometric compositions were considered for the sake of stability. The powders and their ability to sinter were investigated by XRD, SEM, dilatometry and density measurements. The sintered materials were further examined by SEM, thermal expansion and electric conductivity measurements in order to elucidate the resulting microstructure, electrical and mechanical properties. In addition quantum mechanical calculations were performed to obtain insight into the effects of these dopants on the materials electronic band structure and lattice parameter.
Document ID
20050204023
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Zhong, Zhi-Min
(NASA Glenn Research Center Cleveland, OH, United States)
Goldsby, Jon C.
(QSS Group, Inc. Brook Park, OH, United States)
Date Acquired
September 8, 2013
Publication Date
July 20, 2004
Subject Category
Composite Materials
Meeting Information
Meeting: American Ceramic Society 29th International Cocoa Beach Conference and Exposition on Advanced Ceramics and Composites
Location: Cocoa Beach, FL
Country: United States
Start Date: January 23, 2005
End Date: January 28, 2005
Sponsors: American Ceramic Society
Funding Number(s)
OTHER: 22-708-31-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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