NDLI: The Role of Microstructure and Processing on the Proton Conducting Properties of Gadolinium-doped Barium Cerate

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The Role of Microstructure and Processing on the Proton Conducting Properties of Gadolinium-doped Barium Cerate

Content Provider	Semantic Scholar
Author	Haile, Sossina M. West, David Lawrence Campbell, John
Copyright Year	1998
Abstract	The influence of grain boundary conductivity and microstructure on the electrical properties of BaCe0.85Gd0.15O3- d have been examined. Grain sizes were varied by sintering at various temperatures. Impedance data were analyzed using the brick layer model, and some new consequences of this model are presented. The specific grain boundary conductivity exhibits an activation energy of ~0.7eV, and for similar processing routes, is independent of grain size. An isotope effect was observed, indicating that protons (or deuterons) are the mobile species. TEM investigations showed the intergranular regions to be free of any glassy phase that could account for the differences in bulk and grain boundary properties. Single crystal fibers, grown by a modified float zone process, were notably barium deficient, and exhibited a low conductivity, comparable to that of polycrystalline Ba0.96Ce0.85Gd0.15O3-δ.
Starting Page	1576
Ending Page	1595
Page Count	20
File Format	PDF HTM / HTML
DOI	10.1557/JMR.1998.0219
Alternate Webpage(s)	http://addis.caltech.edu/publications/Role%20of%20microstructure%20and%20processing.pdf
Alternate Webpage(s)	http://authors.library.caltech.edu/5440/1/HAIjmr98.pdf
Alternate Webpage(s)	https://doi.org/10.1557/JMR.1998.0219
Volume Number	13
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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