ultrasonic assisted preparation of nano hmx

size reduction of high energy materials such as 1, 3, 5, 7-tetranitro- 1, 3, 5, 7-tetraaza cyclooctane (hmx) has considerable influences on improving their explosive characteristics. in this study, nanosized hmx par­ticles were produced using ultrasonically reprecipitation method by applying water as a safe and accessible antisolvent instead of unsafe conventional methods. sem photographs revealed that much uniform and low agglomerated spherical morphology can be obtained at low concentration of hmx- acetone solution with low temperature antisolvent. these results are achieved from sem and tem photographs and digimizer - winks software.