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为降低α-AlH_3静电感度,选用硬脂酸(SA)作为包覆材料,采用溶剂-非溶剂法对α-Al H3进行表面包覆。通过傅里叶变换红外光谱(FT-IR)、X射线衍射仪(XRD)、X光电子能谱(XPS)、元素分析和扫描电子显微镜(SEM)对包覆前后α-AlH_3的结构和形貌进行表征。按GJB5891.27-2006采用静电火花感度仪JGY-50Ⅲ对包覆前后样品的静电感度进行测试。结果表明:硬脂酸在α-AlH_3表面形成均匀完整包覆层,包覆后的α-AlH_3样品晶体结构和形貌均未发生变化,E50由未包覆前的367mJ降低至测试上限5390mJ时未见发火,包覆使其静电感度降低。
In order to reduce the electrostatic sensitivity of α-AlH 3, stearic acid (SA) was chosen as the coating material, and α-AlH 3 was surface-coated by solvent-nonsolvent method. The structure and morphology of α-AlH 3 before and after coating were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), elemental analysis and scanning electron microscopy Characterization. According to GJB5891.27-2006 electrostatic spark sensitometer JGY-50 Ⅲ before and after coating the electrostatic sensitivity of the sample was tested. The results showed that stearic acid formed a uniform coating on the α-AlH 3 surface and the crystal structure and morphology of the α-AlH 3 coating did not change. The E50 decreased from 367 mJ before uncoated to 5390 mJ No fire, coating to reduce the electrostatic sensitivity.