Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 18, Issue 48, Pages 15459-15463Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201202197
Keywords
chromium nitride; high-pressure chemistry; ion exchange; solid-state reactions; transition metals
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Funding
- U.S. Department of Energy's Office of Basic Energy Sciences
- China 973 Program [2011CB808205]
- National Natural Science Foundation of China [11027405]
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Chromium mononitride (CrN) exhibits interesting magnetic, structural, and electronic properties for technological applications. Experimental reports on these properties are often inconsistent owing to differences in the degree of nonstoichiometry in CrNx. To date, the preparation of bulk and stoichiometric CrN has been challenging; most products are in the form of a thin film produced by non-equilibrium processes, and are often nonstoichiometric and poorly crystallized. In this work, we formulated a solid-state ion-exchange route for the synthesis of CrN under high pressure. The final CrN product is phase-pure, stoichiometric, and well-crystallized in the bulk form. Near-stoichiometric and well-crystallized CrN can be synthesized using the same route at atmospheric pressure, making massive and industrial-scale production technologically feasible. The successful synthesis of stoichiometric and bulk CrN is expected to open new opportunities in diverse areas of fundamental research.
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