Combustion of aluminum–crystallohydrate mixtures

Combustion of flaky aluminum with crystallohydrates containing bounded water was studied. It was found that quasi-homogeneous mixtures of Al and crystallohydrate of sodium sulphate Na2SO4·10H2O or chromium potassium alums CrK(SO4)2·12H2O were able for easy ignition and stable combustion was realized. For sodium sulphate the burning rate was measured in a broad pressure range. The area of pressures and compositions where the stable combustion occurred was found.

► Combustion of Al–sodium sulphate crystallohydrate mixtures was studied.
► The burning rate was measured in the pressure range up to 80 atm in N2 and Ar atmosphere.
► The maximum burning rate was reached for rich mixture at low pressure.
► The maximum burning rate was reached for stoichiometric mixture at high pressure.
► The combustion boundary in dependence on the mass ratio components was found.