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Author Bacon, P. E. ♦ Hou, J. G. ♦ Sleight, A. W.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ NIOBIUM NITRIDES ♦ CHEMICAL PREPARATION ♦ SUPERCONDUCTIVITY ♦ TANTALUM NITRIDES ♦ STRUCTURAL CHEMICAL ANALYSIS ♦ X-RAY DIFFRACTION ♦ ELECTRON MICROPROBE ANALYSIS ♦ MAGNETIC SUSCEPTIBILITY
Abstract It was recently reported that a new barium-niobium oxide, prepared by the ignition in air of a mixture of barium peroxide and niobium metal powders, was superconducting below temperatures of about 20 K. This finding, if true, would be of considerable significance because the highest superconducting transition temperature (T{sub c}) previously found for a niobium-based oxide is 5.5 K. The authors have reproduced this synthesis, and conclude from X-ray diffraction, electron microprobe, and magnetic susceptibility studies that the superconducting phase in this product is basically niobium nitride. Ignition of niobium metal powder in air leads only to niobium oxide, but ignition in air of Ta plus BaO{sub 2} leads to the formation of Ta{sub 2}N. Apparently, there have been no previous reports of nitride formation by any ignition reaction in air.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-10-01
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 119
Issue Number 1


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