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Synthesis of titanium boride (TiB)2 nanocrystallites by solution-phase processing

Published online by Cambridge University Press:  03 March 2011

Susan E. Bates ,
William E. Buhro ,
Claire A. Frey ,
Shankar M.L. Sastry  and
K.F. Kelton
Susan E. Bates
Affiliation:
Department of Chemistry Washington University, St. Louis, Missouri 63130-4899
William E. Buhro
Affiliation:
Department of Chemistry Washington University, St. Louis, Missouri 63130-4899
Claire A. Frey
Affiliation:
Department of Mechanical Engineering, Washington University, St. Louis, Missouri 63130-4899
Shankar M.L. Sastry
Affiliation:
Department of Mechanical Engineering, Washington University, St. Louis, Missouri 63130-4899
K.F. Kelton
Affiliation:
Department of Physics, Washington University, St. Louis, Missouri 63130-4899
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Abstract

Nanocrystalline TiB2 is prepared by reaction of NaBH4 and TiCl4. The initial solution-phase reaction affords an amorphous precursor powder from which 5-100 nm TiB2 crystallites are obtained upon annealing at 900-1100 °C. Crystallite sizes depend on the annealing temperature and other processing parameters. Crystallite morphology is size dependent; crystallites smaller than 12-15 nm are cuboidal, whereas crystallites larger than 12-15 nm are hexagonal platelets. The procedure affords gram quantities of the smallest available TiB2 nanocrystallites.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 10 , October 1995 , pp. 2599 - 2612
Copyright
Copyright © Materials Research Society 1995

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