Luminescent thermochromic fluorescent material as well as preparation method and application thereof

The invention provides a luminous thermochromic fluorescent material as well as a preparation method and application thereof. The chemical formula of the luminescent thermochromic fluorescent material disclosed by the invention is Ca < 2-2x > Al < 0.997 > TaO6: 0.003 Mn < 4 + >, xTb < 3 + >. The preparation method of the luminescent thermochromic fluorescent material comprises the following steps: S1, mixing a Ca source, an Al source, a Ta source, an Mn source, a Tb source and a fluxing agent according to the composition of the chemical formula to obtain a mixture; s2, grinding and calcining the mixture to obtain the luminous thermochromic fluorescent material. The luminescent thermochromic fluorescent material has high chemical stability and ultraviolet corrosion resistance, can present completely different luminescence change trends along with temperature change, can generate a temperature-dependent self-calibration fluorescence intensity ratio signal, is sensitive to temperature response in green/red fluor