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Conference paper - Peer-reviewed, 1996

Preparation of nanosized rhenium oxide and rhenium-based metal particles by thermal decomposition of organic precursors

Seisenbaeva, GA; Kessler, VG; Sundberg, M; Nygren, M; Drobot, DV

Abstract

The thermal decomposition of the organic derivatives of rhenium Re4O2(OMe)(16) (I), ReMoO2(OMe)(7) (II), Re4-xWxO2(OMe)(16) (III) (x less than or equal to 0.25) and Re2O5(acac)(2) (IV) in air at temperatures below 400 degrees C leads in case of I, III and IV to oxide powders where fine crystalline particles (the size in the range 40-60 Angstrom) are included into amorphous matrix. The crystalline phase has ReO3 type structure. In case of II a mixture of ReO3 and MoO3 phases was obtained. In an inert atmosphere (N-2, Ar) and at 300-400 degrees C Re4O2(OMe)(16) (I) decomposes to ReO3 phase; II and III to a tetragonal phase with Re1-xMxO2 composition (M=Mo, x less than or equal to 0.5; M=W, x less than or equal to 0.25); while IV yields spherical amorphous particles (approximate to 1 mu m size) of rhenium metal. The reduction of I-III in hydrogen atmosphere leads to formation of Re or a Re-alloy (with the sigma-phase type of structure) in the temperature range 300-400 degrees C.

Published in

Title: Rhenium and Rhenium alloys : proceedings of the International Symposium on Rhenium and Rhenium Alloys
ISBN: 0-87339-365-1
Publisher: TMS

Conference

International Symposium on Rhenium and Rhenium Alloys devoted to the 70th Anniversary of the Discovery of Rhenium, at the 1997 TMS Annual Meeting

      UKÄ Subject classification

      Inorganic Chemistry
      Materials Chemistry

      Permanent link to this page (URI)

      https://res.slu.se/id/publ/50559