微米级球形HNS的制备及形貌控制  

Preparation and Shape Control of Micron HNS

作　　者：吕春玲[1] 张景林[1] 黄浩[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《火炸药学报》2008年第6期35-38,共4页Chinese Journal of Explosives & Propellants

基　　金：国家"973"项目资助

摘　　要：采用喷雾干燥法制备了微米级六硝基艹氐(HNS),并对其粒度和形貌控制进行了分析。结果表明,不同入口温度下溶剂的挥发速率有较大差异,过高或过低的入口温度会导致颗粒表面形成凹凸不平或破裂缺陷;随着溶液浓度的增加,HNS的平均粒径呈增大趋势;进料量也是影响HNS粒径和形貌的主要因素,进料量越大,HNS平均粒径越大,而颗粒形状则与不同进料量下料液在高速旋转雾化轮上形成液滴的过程相关。获得了颗粒尺寸分布为1～6μm的表面光滑、球状、高纯度的HNS颗粒,并用SEM、XRD和HPLC等方法对其进行了表征分析。HNS particles were prepared by spray-drying. Shape form and particle size controlling of HNS was discussed. The results indicated that volatile rates of solvent under different inlet temperatures were variant greatly. Surface defects of roughness or breakage could be caused by excessively high or low inlet temperature. The average grain size of HNS increased with the increase of solution concentration. Feedstock was a major factor for size and shape controlling of HNS. The average grain size of HNS increased with increasing the feedstock, and the shape of HNS correlates with the establishment of drops on the high-speed atomizing runner under different feedstock. Smoothing-spherical and high-purity HNS grains from 1 to 6 μm were prepared. SEM, XRD and HPLC were used to observe the characteristics of HNS particles.

关 键 词：材料科学 喷雾干燥 HNS 粒度 形貌 

分 类 号：TQ564[化学工程—炸药化工] TB383[一般工业技术—材料科学与工程]