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B.
J. Evans
Professor of Chemistry
Ph.D., University of Chicago
Solid State Chemistry: Electronic and Magnetic Materials,
Chemistry of Iron-containing Phases, Mineral Physics,
Order-Disorder, Phase Transitions
Phone: (734) 763-4228
E-mail:
bjemag@umich.edu |
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| A traditional theme in the materials chemistry
of inorganic solids has been the synthesis and characterization
of crystal/chemical structures with interesting properties
that directly affect the quality of human environments
or that influence efforts in the research/development and
manufacturing sectors of the economy. In our current research
program these traditional interests have been fused with
the emergent one of extensive molecular engineering of
reactant materials so as to obtain by means of highly specific
reaction conditions a solid product with closely-controlled
compositional, structural and morphological parameters.
A special feature of our group's efforts in this area has
been to choose reactants whose structure and reactivity
patterns offer some possibilities of elucidating the elementary
steps in the formation of a particular solid. For example,
when oxides or carbonates are employed as starting materials
in the synthesis of SrFe12O19, a complex reaction path
is followed which involves a perovskite intermediate and
an unusual redox sequence for iron. When a metallo-organic/iron
hydroxide reactant pair is employed, the reaction path
proceeds through a single solid phase, which contains important
structural elements of the final SrFe12O19 product; indeed
the SrFe12O19 could be considered to be an exsolution product
of the starting material. Studies on mixed-valence compounds
[spinels, silicates (Ilvaite) and iron phosphates], naturally
occurring glasses (tektites), inorganic phases in coals
and novel permanent magnet oxides constitute significant
aspects of our group's current efforts.
AWARDS
- Camille and Henry Dreyfus Awardee
- American
Chemical Society Catalyst Medalist
- Chemical
Manufacturers Association Associate of the Danforth
Foundation
- Research Fellow of the Alfred P. Sloan
Foundation
- Alexander Von Humboldt Fellow
Woodrow Wilson Fellow
REPRESENTATIVE PUBLICATIONS
- CR Bluncson, BJ Evans. "The Effects of Substitutional
Impurities on the Magnetic and 57Fe Hyperfine Interactions
in Ilvaite, CaFe3Si2O7O(OH) A Mixed-Valence Iron
Silicate" in
Proc. 2nd Nassau Conference on the Moessbauer Effect;
C. Winter, E Alp, eds; Wm. C. Brown: Iowa, 1995;
p 81.
- P Glass, C Koeberl, F Senftle,
JD Blum, BJ Evans, GA Izett, H Povenmire, RL Strange,
AN Thorpe. "A
Muong Nong-Type Georgia Tektite" Geochimica
et Cosmochimica Acta. 1995, 59, 4071.
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