Preparation of nanostructured platinum/yttria-stabilized zirconia cermet by the sol-gel method

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie960222z· OSTI ID:419841

Shiga, Hidemoto; Okubo, Tatsuya; Sadakata, Masayoshi ^[1]

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1. Univ. of Tokyo (Japan). Dept. of Chemical System Engineering

Nanostructured platinum/yttria-stabilized zirconia (YSZ) cermet (composite of ceramics and metal) is obtained by the sol-gel method. Influences of the processing parameters on the nanostructure are experimentally studied using X-ray diffraction, field emission scanning electron microscopy, electron probe microanalysis, and nitrogen adsorption. The nanostructure of the cermet is controlled by the Pt/YSZ ratio, gelling procedure, and calcination temperature. The slower gelling or higher temperature calcination enlarges the YSZ grain size. The addition of a smaller amount of Pt or calcination at higher temperatures reduce the Brunauer-Emmett-Teller (BET) surface area when calcined at 973 K or above. The addition of a larger amount of Pt increases the porosity when calcined at 973 K or above. By controlling the conditions of synthesis, gelling, and Pt content, the average YSZ grain size was kept within 50 nm after calcination at 1,173 K.

• OSTI ID: 419841
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 12 Vol. 35; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
CERMETS
MICROSTRUCTURE
PARAMETRIC ANALYSIS
PHYSICAL PROPERTIES
PLATINUM
SOL-GEL PROCESS
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
YTTRIUM OXIDES
ZIRCONIUM OXIDES