Device and production method for improving performance of cerium-doped flashing crystals

The invention discloses a device and a production method for improving performance of cerium-doped flashing crystals. The device comprises a furnace cavity and a crucible arranged in the furnace cavity, a heat insulating shell is arranged outside the crucible, a heating device is arranged outside the heat insulating shell, and an opening is formed in the top of the heat insulating shell; a lift rotating mechanism extending into the heat insulating shell is arranged at the top of the furnace cavity, a first air incoming pipe and a second air incoming pipe are arranged on the outer side of the furnace cavity, an exhaust pipe is arranged at the bottom of the furnace cavity, and the cerium-doped flashing crystals are obtained through blanking, inflating, growing, sample treating and testing. A certain amount of CO2 is fed, and CO2 is thermally decomposed at high temperature to obtain O2, so that oxygen vacancy of the crystals is reduced, completeness of crystal lattices is improved, and performance of the cerium-