Preparation and effects on stability and electrostatic sensitivity of α-AlH3 by coated with stearic acid

The alpha-AlH3 was coated with stearic acid (SA) by the method of solvent-nonsolvent. The crystal structure and the morphology of the prepared samples before and after coating were characterized by Fourier transform infrared spectroscopy (FTIR), elemental analysis (EA), scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The electrostatic sensitivity of alpha-AlH3 samples before and after coating was measured by JGY-50 III. The results show that coating agent is firmly coated on the surface of alpha-AlH3. The testing results show alpha-AlH3 coated with SA can decrease the electrostatic sensitivity. The spark energy required for 50 % initiation probability (E-50) increased from 367 mJ to out of range.