Research article - Peer-reviewed, 2004
Stabilization of metastable face-centered cubic cobalt and the tetragonal phase of zirconia by a carbon shell: Reaction under autogenic pressure at elevated temperature of CoZr2(acac)(2)((OPr)-Pr-i)(8)
Pol, Swati V.; Pol, Vilas G.; Seisenbaeva, Gulaim; Kessler, Vadim; Gedanken, A.Abstract
Spherical Co and ZrO2 particles in the size range of 11-16 nm, exhibiting at room temperature metastable phases, fee for cobalt, and tetragonal for zirconia, were synthesized, by the reaction under autogenic pressure at elevated temperature (RAPET) technique. The tetragonal phase in ZrO2 was obtained without doping the ZrO2 with trivalent impurities. Using high-resolution transmission electron microscopy and selected area energy-dispersive X-ray analysis it is manifested that a carbon shell of similar to4 nm thickness is formed on the surface of Co and ZrO2 nanocrystallites. This carbon shell is responsible for stabilizing the high-temperature metastable phases at room temperature. These two products were obtained by the dissociation of CoZr2(acac)(2)((OPr)-Pr-i)(8) at 700 degreesC under its autogenic pressure.Published in
Chemistry of Materials2004, volume: 16, number: 9, pages: 1793-1798
Publisher: AMER CHEMICAL SOC
Authors' information
Pol, Swati V.
Bar-Ilan University
Pol, Vilas G.
Bar-Ilan University
Swedish University of Agricultural Sciences, Department of Chemistry
Swedish University of Agricultural Sciences, Department of Chemistry
Gedanken, A.
Bar-Ilan University
UKÄ Subject classification
Nano-technology
Materials Chemistry
Inorganic Chemistry
Publication Identifiers
DOI: https://doi.org/10.1021/cm049830s
URI (permanent link to this page)
https://res.slu.se/id/publ/50530