ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Nitrides remain a relatively unexplored class of materials primarily due to the difficultiesassociated with their synthesis and characterization. Several synthetic routes, including hightemperature reactions, microwave assisted synthesis, and the use of plasmas, to prepare binary andternary nitrides have been explored. Transition metal nitrides form a class of materials with uniquephysical properties, which give them varied applications, as high temperature ceramics, magneticmaterials, superconductors or catalysts. They are commonly prepared by high temperatureconventional processes, but alternative synthetic approaches have also been explored, more recently,which utilize moderate temperature condition. Transition metal nitrides particularly, molybdenumnitride, niobium nitride, and tungsten nitride have important applications as catalyst inhydrodenitridation reactions. These nitrides have been traditionally synthesized using hightemperature nitridation treatments of the oxides. The nitridation temperatures are very high (〉 800-1000 oC).The aim of our work is to synthesize molybdenum nitride by a simple, low-temperature route. Themethod involves pyrolysis of a polymeric precursor, which was prepared from the condensationreaction between triethanolamine and molybdic acid. The melting point of the product is 180oC.The polymeric precursor and its pyrolyzed products are characterized by Fourier transform infraredspectroscopy (FTIR) and X-ray diffraction (XRD). X-ray diffraction shows that molybdenum nitride(MoN) obtained from this method has hexagonal crystal structure. MoN is obtained by this methodat very low temperature (~ 400 oC)
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.29-30.195.pdf
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