Abstract
X-ray diffraction, scanning electron microscopic, and X-ray photoelectron spectroscopic examinations, as well as energy dispersive X-ray and elemental analyses revealed the formation of single-phase VB2 with the average particle sizes of 20–35 nm from the reaction between vanadium(III) chloride and sodium borohydride at a molar ratio of 1: 10 in the temperature range of 595–930°C in an argon atmosphere at a contact time of 14–28 h. The reaction between amorphous boron and vanadium powders at 800°C in an argon atmosphere at a contact time of 32 h in Na2B4O7 and KCl ionic melts gave VB2 with the average particle size of ~90 nm.
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