Abstract
The preparation of ultra‐fine energetic materials still faces great challenges. In order to prepare the ultra‐fine NTO crystals with controllable size and morphology, the study proposes a novel ultrasonic‐assisted spray technology that can ensure the rapidity and safety of the preparation of ultra‐fine NTO crystals. The as‐prepared NTO crystals are characterized by scanning electron microscopy (SEM) and X‐ray diffraction (XRD), and the effects of solvent type, solution concentration, ultrasonic parameters, and anti‐solvent on the morphology and average size of NTO crystals are investigated. The results obtained show that NTO ultra‐fine crystals with an average particle size of 0.2 μm can be obtained quickly in optimum preparation conditions. The effectiveness of the technique presented for preparing ultra‐fine spherical NTO crystals was demonstrated by comparison with baseline experiments. Ultrasonic‐assisted spray technology offers a safe and fast route for the preparation of ultra‐fine NTO particles and reveals an ideal method for the preparation of other ultra‐fine energetic particles.
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