To reduce the electrostatic sensitivity of α-AlH3,α-AlH3 was coated by the solvent-nonsolvent method using stearic acid (SA) as coating material.The crystal structure and morphology of samples 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(SEM).The electrostatic sensitivity of α-AlH3 samples before and after coating was measured by JGY-50Ⅲ type static spark sensitivity tester according to GJB5891.27-2006 method.Results show that a complete,uniform coating layer of SA is formed on the surface of α-AlH3.The crystal structure and morphology of the sample after coating are not changed.When the spark energy required for 50% initiation probability (E50)decreases from 367 mJ before coating to test limit 5390 m J,the fire does not occur.The coating makes the electrostatic sensitivity reduce.%为降低α-AlH3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-AlH3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-AlH3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-AlH3表面形成均匀完整包覆层,包覆后的α-AlH3样品晶体结构和形貌均未发生变化,E5.由未包覆前的367 mJ降低至测试上限5390 mJ时未见发火,包覆使其静电感度降低.
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