Nikolaenko, I. V. Combined Method for Obtaining Ultradispersed / I. V. Nikolaenko, A. E. Krasovskaya, G. P. Shveikin // Russian Journal of Applied Chemistry. - 2015. - Vol. 88, № 1. - P35-39. - Bibliogr. : p. 39 (9 ref.) Кл.слова (ненормированные): ВАНАДИЙ -- ФАЗОВЫЙ СОСТАВ -- ПОРОШКИ -- УГЛЕРОД Аннотация: New opportunity to synthesize nano- and ultradispersed powdered materials by combining of two procedures, classical liquid-phase precipitation and low-temperature microwave calcination, at a rather simple instrumentation is described. It was found in precipitation of precursors that, pending on the synthesis conditions (solution pH, amount of carbon, synthesis on the vessel surface or in the solution bulk), particles of hydrated vanadium oxide have different morphologies. It was also found that precursor powders have an insignifi cant microporosity, which is reserved in the fi nal products in trace amounts upon thermal treatment of samples. Intermediate and fi nal vanadium products were synthesized in an electromagnetic fi eld in a fl ow of argon, their phase composition and structure were examined in the stages of thermolysis, reduction, and arbidization, and their lattice constants were calculated. The morphology, size, and particle size distribution in the samples under study were determined. |