Preparation and characterization of ceria-zirconia ceramics using a sol-gel process

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · High Temperature and Materials Science

OSTI ID:696685

Bin, Zhu ^[1]; Changrong, Xia; Xiaoguang, Luo; Guangyao, Meng ^[2]

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1. Uppsala Univ. (Sweden). Dept. of Materials Science
2. Univ. of Science and Technology of China, Hefei, Anhui (China). Dept. of Materials Science and Engineering

Both powder and thin film CeO{sub 2}-ZrO{sub 2} ceramic materials have been successfully prepared via a sol-gel process. In this process, Zr and Ce hydroxide-mixed sols were prepared by hydrolysis of Zr oxychloride and Ce nitrate. The thin films were coated on glass or alumina plates and also alumina tubes by a spin- or dip-coating procedure. The structure and phase of the powder or thin-film CeO{sub 2}-ZrO{sub 2} have been characterized by X-ray diffraction (XRD). Electrical properties were measured by means of complex impedance analyses. The cyclic voltammogram measurements were performed for the ITO glass-supported CeO{sub 2}-ZrO{sub 2} thin films. Powder CeO{sub 2}-ZrO{sub 2} solid solutions having the tetragonal polymorph of zirconia are obtained for ceria contents up to 50 mol%, whereas for a ceria content more than 50 mol%, the CeO{sub 2}-ZrO{sub 2} is stabilized in the cubic fluorite structure. The thin-film CeO{sub 2}-ZrO{sub 2} usually has a cubic structural characteristic. Both powder and thin-film CeO{sub 2}-ZrO{sub 2} materials are nanostructured with an average grain size of 10 nm, and they have shown very different electrical properties. The CeO{sub 2}-ZrO{sub 2} thin films have great potential for applications in various electrochemical or optoionic devices, such as fuel cells, electrochromic devices, and so forth.

• OSTI ID: 696685
• Journal Information: High Temperature and Materials Science, Journal Name: High Temperature and Materials Science Journal Issue: 2-3 Vol. 38; ISSN 1080-1278; ISSN HTMSFP
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM OXIDES
CRYSTAL STRUCTURE
ELECTRICAL PROPERTIES
POWDERS
SOL-GEL PROCESS
SOLID SOLUTIONS
THIN FILMS
X-RAY DIFFRACTION
ZIRCONIUM OXIDES