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Crucible‐Free Preparation of Transition‐Metal Borides: HfB 2
Author(s) -
Henschel Anne,
Binnewies Michael,
Schmidt Marcus,
Borrmann Horst,
Grin Yuri
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201703181
Subject(s) - crucible (geodemography) , boron , halide , materials science , transition metal , oxygen , phase (matter) , inorganic chemistry , metallurgy , chemistry , catalysis , organic chemistry , computational chemistry
Abstract This study gives an account of an innovative, crucible‐free technique for the synthesis of single‐phase borides at relatively moderate temperatures. A metal wire heated by an electrical current reacts with a chosen gaseous boron halide in a gas/solid reaction yielding a single‐phase, oxygen‐ and carbon‐free product, as evidenced by X‐ray powder diffraction and chemical analysis. This method is demonstrated using the example of hafnium reacting with boron tribromide. Preliminary thermodynamic considerations show that this kind of crucible‐free synthesis specifically enables the preparation of borides of transition metals and similar elements.