Ultrafine particle energy-storage type long-lasting phosphor material and preparation method thereof

Abstract

The invention discloses an energy-storage type long-lasting phosphor material and a preparation method thereof. According to the preparation method, after multiple metal oxides are respectively doped with manganese element, multiple oxide superfine particle powder raw materials are prepared; and then the multiple oxide superfine particle powder raw materials are uniformly mixed, and the obtained mixture is roasted so as to obtain an energy-storage type long-lasting phosphor material. The preparation process is low in energy consumption, and the prepared phosphor material is non-toxic, non-radioactive, low in excitation conditions, high in optical storage speed, high in afterglow brightness, long in afterglow time, stable in luminescence property, and wide in application scope.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a long afterglow luminescent material and a preparation method thereof, in particular to an ultrafine particle energy storage type long afterglow luminescent material and a preparation method thereof. Background technique [0002] Long-lasting luminescent materials are also called light storage materials or luminous materials, which refer to the light that can store the energy of external light irradiation under natural light or other artificial light sources, and then slowly release these stored energy in the form of visible light at room temperature. Luminescent materials. [0003] The basic luminescent principle of long-lasting luminescent materials is that in the process of material preparation, doped elements form luminescent centers and trap centers in the matrix. When excited by external light, the ground state electrons of the luminescent centers...

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Problems solved by technology

[0004] The commonly used traditional long afterglow materials are mainly sulfide system materials, including alkaline earth metal sulfides and transition element sulfides. However, sulfide luminescent materials have poor chemical stability and are easy to decompose under the action of ultraviolet light or humid air, and the luminescence is weakened. Afterglow The time is short, which limits its wide application

[0005] Since the 1990s, rare earth doped sulfides have opened up a new world for the development of long afterglow materials. The brightness and afterglow time of luminescent materials added with rare earth ions as activators have been greatly improved, especially rare earth activated alkaline earth aluminates. And the long afterglow material of silicate has excellent characteristics such as high luminous efficiency, long afterglow time, relatively stable chemical properties, and no radioactive pollution. However, it still has monotonous luminous color, and the emission spectrum is mainly concentrated in the range of 440-520nm. Defects such as instability in contact with water or slow light storage speed

[0007] The Chinese invention patent with the authorized notification number CN100560688C discloses a long afterglow luminescent material, which is a composite aluminate luminescent material containing sulfur and / or selenium and phosphorus elements and activator ions. After sintering for 2-20 hours under a reducing atmosphere, and then sintering for 2-30 hours in a reducing atmosphere, the prepared material emits an emission spectrum of 420-650nm under the excitation of short-wave light below 500nm, showing blue-violet, blue-green, yellow-green, composite white or The long afterglow of the red luminescent color emits light, and the light absorption speed is fast. However, the preparation of this method requires high energy consumption, which is not conducive to large-scale and low-cost industrial production

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