LI Yaru, REN Hui, JIAO Qingjie
(State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)

Abstract: Molybdenum trioxide is a major oxidant in thermite, whose morphology plays an important role in the performance of thermite.Therefore, the influence of oil phase and calcining temperature on the morphology of molybdenum were disussed. Ammonium paramolybdate,nitric acid, and sodium dodecylbenzene sulfonate were chosen to be the molybdenum source, the precipitant and the modifier, separately. The chemical precipitation with and without oil phase assistance was applied to fabricate the molybdenum trioxide. SEM, XRD and FT-IR were used to analyse the morphologies and structures of the products. Results showed that oil phase could efficiently control the morphology of the product. With the increase of the temperature, the size of the product decreased. FT-IR showed that the adsorption peak of molybdenum red shifted with the temperature increased..

Key words: molybdenum trioxide; chemical precipitation; crystal; calcining temperature