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Two-stage synthesis of ultrafine powder of chromium carbide

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      Abstract

      A new method for the synthesis of ultrafine powder of chromium carbide is proposed, which combines liquid-phase precipitation on a carbon support and low-temperature microwave heat treatment in argon flow. The whole spectrum of the intermediate compounds obtained during thermolysis, reduction and carbonization of chromium precursors to the final product Cr3C2 is presented. The structure, morphology, particle size distribution, as well as the phase composition and the specific surface area values of the produced chromium compounds are shown.

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      Most cited references 7

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      Simultaneous synthesis and consolidation of chromium carbides (Cr3C2, Cr7C3 and Cr23C6) by pulsed electric-current pressure sintering

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        Synthesis of ultrafine powder of vanadium carbide V 8 C 7 by microwave heating

        In this article a new method of synthesizing ultrafine powder of vanadium carbide V 8 C 7 by a combination of classic liquid-phase precipitation on a carbon support and low-temperature microwave heat treatment is proposed. An entire spectrum of intermediates obtained during thermolysis, reduction, and carbidization of precursors to the final product has been presented. The structure, morphology and distribution according to the particle size, phase structure and specific surface area of samples has been shown.
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          Microwave synthesis of ultrafine and nanosized powders of tungsten oxide and carbide

           Irina Nikolaenko (corresponding) ,  Nikolay Kedin,  Gennadii Shveikin (2014)
          A new method of synthesis of nanosized and ultrafine tungsten oxide and carbide powders is offered, which combines carbon carrier supported classical liquid-phase precipitation and low-temperature microwave treatment. The full range of intermediate substances obtained during thermolysis, reduction and carburization of precursors to final products is presented. It is shown that cooling of ammonium tungstate solution to 4 °C and the use of carbon carrier at the precipitation stage can increase the specific surface area from 20 to 100 m 2 g −1 .
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            Author and article information

            Affiliations
            a Ural Branch of the Russian Academy of Sciences, Institute of Solid State Chemistry, Yekaterinburg, Russia
            b Yeltsin Ural Federal University, Yekaterinburg, Russia
            Author notes
            [* ] Correspondence address, Irina Vladimirovna Nikolaenko, Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 91, Pervomaiskaya st., 620990, Yekaterinburg, Russia, Tel.: +7(343)3623396, Fax: +7(343)3744495, E-mail: nikolaenko@ 123456ihim.uran.ru
            Journal
            ijmr
            International Journal of Materials Research
            Carl Hanser Verlag
            1862-5282
            2195-8556
            9 January 2018
            : 109
            : 1
            : 83-86
            MK111577
            10.3139/146.111577
            © 2018, Carl Hanser Verlag, München
            Counts
            References: 10, Pages: 4
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            Short Communications

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