| 초록 |
Due to high volumetric density of hydrogen, 0.147 kg/L and energy capacity, aluminium hydride has been attempted to use in solid fuels as a rocket propulsion ingredient. Aluminium hydride forms various polymorphs such as the alpha(α), alpha prime(α’), beta(β), delta(δ), epsilon(ε), zeta(ζ) and gamma(γ) phase depending on the reaction condition. In this work, crystalline aluminium hydride was extracted via organometallic reactants of lithium aluminum hydride and aluminum chloride using diethyl ether and toluene. Crystalline forms of aluminium hydride including α and γ phases could be defined by XRD analysis. Since the amorphous forms could not be detected, we traced the potential presence of the other forms by an IR with microscope. The finally obtained aluminium hydride crystals were 5-200 μm as seen in SEM. Phase transition to α-alane is being studied with various reaction conditions. |
