Energy-storing type long-afterglow light-emitting materials with fluorescence property and method for preparing same

Abstract

A long afterglow luminescent material with fluorescent energy storage, characterized in that it is made of the following raw materials, the substrate is at least two selected from strontium carbonate SrCO3, aluminum oxide Al2O3, calcium carbonate CaCO3, and its weight percentage is: 75.9~ 96.0%; activator europium oxide Eu2O3, its weight percentage is: 0.5-1.5%; co-activator is at least one selected from dysprosium oxide Dy2O3, terbium oxide Tb4O7, its weight percentage is: 0.1-0.8%; fluxing agent boric acid H3BO3 , the weight percentage is: 2-15%; the reducing agent oxalic acid H2C2O4, the weight percentage is: 0.1-6.8%. The invention also discloses its preparation method. The material of the present invention has dual characteristics of fluorescence and long afterglow. After being excited by visible light or ultraviolet light, strong fluorescence and luminous brightness can be observed in the dark or under weak light conditions, and the afterglow time is as long as 30 hours or more. .

Description

technical field [0001] The invention relates to a luminescent material, in particular to a fluorescent energy storage type long afterglow luminescent material; the invention also relates to a preparation method of the fluorescent energy storage type long afterglow luminescent material. Background technique [0002] The energy-storage luminescent materials in the prior art are made by sintering at high temperature with sulfides such as ZnS:Cu as the main matrix. Due to the short luminescence time of the sulfide phosphor, the brightness is not good; the chemical stability is poor. In order to change these shortcomings, some people have added radioactive substances to sulfide to compensate for its shortcomings, but the operation of adding radioactive substances is not only harmful to the human body, but also pollutes the environment. Since the 1990s, many people have invested a lot of experiments and invented long-lasting luminescent materials based on strontium aluminate salt...

AI Technical Summary

Problems solved by technology

Due to the short luminescence time of sulfide phosphors, the brightness is not good; the chemical stability is poor

In order to change these shortcomings, some people have added radioactive substances to sulfide to compensate for its shortcomings, but the operation of adding radioactive substances is not only harmful to the human body, but also pollutes the environment.

Since the 1990s, many people have invested a lot of experiments and invented long-lasting luminescent materials based on strontium aluminate, which greatly improved the luminous brightness, but none of them have fluorescence.