Fluorescent whitening automobile paint based on BAM, and preparation method thereof

The invention relates to a BAM-based fluorescent whitening automobile paint and a preparation method thereof. The BAM-based fluorescent whitening automobile paint is composed of an optical functionalmaterial and a carrier material, wherein the optical functional material is nano-scale barium magnesium aluminate-based blue fluorescent powder, the carrier material is an automobile varnish, and after the two components are compounded according to a mass ratio of 10-50%, the surface of an automobile white primer is coated with the mixture, wherein the chemical general formula of the optical functional material is Ba1-xEuxMgAl10O17, and x is the molar ratio of europium ion Eu substituted barium ion Ba, and is greater than or equal to 0.40 and less than or equal to 0.80. According to the invention, through the interaction of the chemical initiation of NH4Cl, the grain boundary blocking of nanoparticles and the exchange coupling of ultrahigh europium ion Eu concentration, the europium ions Eu in the