Experiment on Preparation of Vanadium Nitride from Vanadium Pentoxide Flake and Graphite

Vanadium pentoxide flake and graphite were used as raw materials to prepare vanadium nitride(VN) with high temperature non-vacuum method in the laboratory.The result shows that ball milling time of vanadium pentoxide flake has influence on the content of nitrogen and carbon in VN.Vanadium pentoxide flake is characterized by its grindability,and the optimal granularity proportioning is 0.48(the flake milled for 15 s):0.52(the flake milled for 2 min).After the milled vanadium pentoxide flake is subject to the agglomeration process(1 490℃) following reduction and nitridation,agglomeration time exerts little effect on the reaction process and chemical composition of product.The agglomeration time can be controlled within 2 to 4 hours.