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Recently, Harvard scientists gave an interesting study, using diamonds to get metal hydrogen at 495GPa on the top anvil container technology (DAC).
Hydrogen atoms exhibit metal-bonded metallic hydrogen species under high pressure, and as high-energy energetic materials, their energy density is as high as 218 kJ/g, which is about 50 times that of TNT explosives (4.65 kJ/g). It is the best overall performance. About 40 times the Ottokin HMX explosive (5.53kJ/g).
However, although the explosion is very powerful, the metal hydrogen explosion conditions are too harsh and require a complete external oxidant supply. As a fuel, the rocket engine can achieve a specific impulse of up to 1700 seconds while it is at a temperature of 160K (-113.15°C) or even Kelvin. Superconductivity can also occur at high temperatures of 290k (16.85°C) and is quite interesting.
It can be foreseen that metal hydrogen has broad application prospects in the fields of high-energy explosives, rocket fuels, and high-temperature superconductors.
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