Song Xiaolan, Wang Yi, An Chongwei, Guo Xiaode, Li Fengsheng
National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Technology, Nanjing 210094, China.
J Hazard Mater. 2008 Nov 30;159(2-3):222-9. doi: 10.1016/j.jhazmat.2008.02.009. Epub 2008 Feb 13.
Three kinds of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) samples with spherical (beta-phase), needle (gamma-phase) and polyhedral (beta-phase) shapes were fabricated by wet milling, solvent/non-solvent and riddling methods, respectively. By changing the technical conditions, HMX powders with different particle sizes were obtained for each kind of sample. All as-prepared samples were characterized by laser granularity measurement, scanning electron microscopy (SEM) and X-ray diffractometry (XRD). Taking advantage of mechanical sensitivity tests, slow cook-off tests and differential scanning calorimetry (DSC) analysis, the mechanical sensitivity and thermal stability of HMX samples were found to depend on particle size and morphology. Results indicated that particle size played a significant role in the safety of HMX, and that morphology regulated the experimental results, i.e., for each kind of HMX samples, the mechanical sensitivity and thermal stability of HMX changed if the particle size differed. However, the trends of these changes exhibit much variance if the microstructure of the HMX particles is altered. Consequently, the difference in safety for these kinds of samples has to do with their specific morphology.
分别采用湿磨法、溶剂/非溶剂法和筛选法制备了三种具有球形（β相）、针状（γ相）和多面体状（β相）的八氢-1,3,5,7-四硝基-1,3,5,7-四氮杂环辛烷（HMX）样品。通过改变工艺条件，每种样品都获得了不同粒径的HMX粉末。所有制备的样品均通过激光粒度测量、扫描电子显微镜（SEM）和X射线衍射仪（XRD）进行表征。利用机械感度测试、慢速烤燃试验和差示扫描量热法（DSC）分析，发现HMX样品的机械感度和热稳定性取决于粒径和形貌。结果表明，粒径对HMX的安全性起着重要作用，形貌则对实验结果有调节作用，即对于每种HMX样品，如果粒径不同，HMX的机械感度和热稳定性就会发生变化。然而，如果HMX颗粒的微观结构发生改变，这些变化趋势会表现出很大差异。因此，这些样品的安全性差异与其特定形貌有关。
