Oxidation of Boron Modified with Vanadium Pentoxide
V. G. Shevchenko, V. N. Krasilnikov, D. A. Eselevich, A. V. Konyukova, O. G. Reznitskikh
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
Keywords: boron powders, surface modification, vanadium pentoxide, reactivity
Abstract
The oxidation of amorphous boron powders modified with vanadium pentoxide were studied by thermogravimetry, differential scanning calorimetry, X-ray phase analysis, and electron microscopy. The modification was carried out by mixing powders with vanadium-containing gels: V2O5 × nH2O hydrogel and V(OCH2)2 × n(HOCH2)2 oleogel. It was found that adding 2 wt.% V2O5 to the amorphous boron powder led to a decrease of 200 °C in the temperature at the onset of its intense oxidation and to a 25% increase in the specific heat release during interaction under heating in air at a rate of 10 °C/min. The reaction of boron with vanadium pentoxide is considered within the framework of a boron thermal process model.
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