Blue up-conversion luminescent material with high efficiency and high thermal stability and preparation method of blue up-conversion luminescent material

The invention belongs to the technical field of inorganic luminescent materials and in particular relates to a blue up-conversion luminescent material with high efficiency and high thermal stability and a preparation method of the blue up-conversion luminescent material. The preparation method comprises the following steps: preparing Tm/Yb codoped calcium gadolinium aluminate by using a high-temperature solid-phase method, uniformly mixing high-purity raw materials of Gd2O3, Yb2O3, Tm2O3, Al2O3 and CaCO3 according to a ratio, and performing sintering, so as to obtain a Tm/Yb codoped calcium gadolinium aluminate luminescent material. The luminescent material has blue light emission of 476nm under near-infrared light excitation of 980nm, and in addition, is high in up-conversion luminescence efficiency; the luminescent material provided by the invention is good in thermal stability and environment friendliness, and can be widely applied to fields such as three-dimensionaldisplay and anti-fake ma