Preparation method of zero-temperature quenched green luminescent fluorescent ceramic

The invention provides a preparation method of zero-temperature quenched green luminescent fluorescent ceramic. The chemical formula of the fluorescent material is MgMnAl2O4, and x is greaterthan or equal to 0.0001 and less than or equal to 0.5. The preparation method of the fluorescent ceramic material comprises the following steps: proportioning magnesium oxide, aluminum oxide and manganese dioxide according to the chemical formula MgMnAl2O4, and synthesizing the prepared powder into the fluorescent ceramic with a cubic spinel phase through a discharge plasma sintering or hot pressing sintering technology. Mn is diffused into the spinel structure in the high-temperature sintering process to replace Mg ions in the existing tetrahedral structure to serve as a light-emitting center, and the zero-temperature quenched green luminescent fluorescent ceramic is obtained. Under the excitation of ultraviolet-blue-violet light, green fluorescence with narrow bandwidth is emitted; the fluorescence pea