NDLI: Electrical Conductivity of CeO$_{2}$ Prepared from Nanosized Powders

Content Provider	Springer Nature Link
Author	Muccillo, E. N. S. Rocha, R. A. Tadokoro, S. K. Rey, J. F. Q. Muccillo, R. Steil, M. C.
Copyright Year	2004
Abstract	Nanosized powders of cerium dioxide with controlled physical properties were prepared by the precipitation technique using ammonium hydroxide or oxalic acid as precipitating agent. The calcined precursors were studied by nitrogen adsorption to determine the specific surface area, X-ray diffraction for phase characterization and crystallite size determination, and by laser scattering for particle size distribution. The morphology of powder particles was observed by scanning electron microscopy. It is shown that both precipitating materials may be used for the preparation of nanocrystalline powders (< 10 nm) with high values of specific surface area (> 90 m$^{2}$ ⋅ g$^{− 1}$). The observed differences between powders prepared from hydroxides or oxalates rely on the distribution of particle sizes and in the morphology of the agglomerated particles. Impedance spectroscopy experiments were carried out in the 5 Hz–13 MHz frequency range under controlled partial pressure of oxygen from 10 ppm to 1 atm. The analysis of these results allowed for the determination of the charge carriers responsible for the electrical transport in the ceria sintered pellets.
Starting Page	609
Ending Page	612
Page Count	4
File Format	PDF
ISSN	13853449
Journal	Journal of Electroceramics
Volume Number	13
Issue Number	1-3
e-ISSN	15738663
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ceria nanocrystalline powders characterization techniques electrical conductivity Polymer Sciences Optical and Electronic Materials Characterization and Evaluation Materials Ceramics, Glass, Composites, Natural Methods Crystallography
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Mechanics of Materials Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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