Ultraviolet light irradiation induced photochromic barium titanate fluorescent powder and application thereof

The invention discloses ultraviolet light irradiation induced photochromic barium titanate fluorescent powder and application. The ultraviolet light irradiation induced photochromic barium titanate fluorescent powder comprises one or a combination of more of 0-2% of BaCO3, 0-2% of TiO2, 0-2% of Er2O3, 0-2% of Yb2O3 and 0-2% of Nd2O3. In the combination, the sum of the principles of all the components is 100%. Under the excitation of 980 nm and 1550 nm, the sample shows different light-emitting colors, and under the common excitation, the sample shows another light-emitting color; based on the application of dual-mode luminescence regulation and control of up-conversion luminescence of photochromic effect, dynamic anti-counterfeiting application based on time is carried out according to different coloring rates before and after rare earth doping. In order to improve the anti-counterfeiting technical means, Er < 3 + >, Yb < 3 + > and Nd < 3 + > ions are doped to obtain the reversible photochromic perovskite pow