Abstract: A combustion synthesis system includes: a supplying unit that produces a composite by mixing particle powder containing Si, particle powder containing SiO2, and an N2 gas; a reaction unit having heat resistance and pressure resistance in which combustion synthesis that uses the composite supplied from the supplying unit as a source material proceeds; an ignition unit that ignites the composite supplied to the reaction unit; and a heat collection unit that takes reaction heat from a combustion synthesis reaction in the reaction unit out of the reaction unit.