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.

doi:10.1021/cm049830s

Sammanfattning

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.

Publicerad i

Chemistry of Materials
2004, volym: 16, nummer: 9, sidor: 1793-1798
Utgivare: AMER CHEMICAL SOC

SLU författare

Seisenbaeva, Gulaim
- Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
Kessler, Vadim
- Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet

UKÄ forskningsämne

Materialkemi
Oorganisk kemi
Nanoteknik

Publikationens identifierare

DOI: https://doi.org/10.1021/cm049830s

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/50530