Preparation method of long-afterglow luminescent material

Abstract

The invention discloses a preparation method of a long-afterglow luminescent material. The preparation method comprises the following steps: s1, weighing raw materials, a fluxing agent and a reducing agent; s2, stirring and mixing ae luminous raw material and the fluxing agent; s3, carrying out primary firing; s4, carrying out secondary firing s5, grinding; and s6, sieving and drying. The raw material of the long-afterglow luminescent material is SrAl2O4.Eu < 2 + >, the fluxing agent is a mixture of P2O5 and B2O3, charcoal is laid at the bottom in a high-temperature resistance furnace and used for forming a reducing environment in the high-temperature resistance furnace, hydrogen with the concentration of 5-7% is introduced into the high-temperature resistance furnace for secondary firing, after secondary firing is completed, the raw material is taken out, the raw material subjected to secondary firing is mixed with zirconium oxide beads, and the mixture is put into a ball mill. Charcoal, activated carbon and hydrogen are added in the primary firing process and the secondary firing process of the raw materials respectively, the reduction environment in the firing process can be effectively maintained, zirconium oxide beads and water are added in the grinding process, the grinding fineness is effectively improved, and the completeness of a crystal form is guaranteed.

Description

technical field [0001] The invention relates to the technical field of luminescent material preparation, in particular to a preparation method of a long afterglow luminescent material. Background technique [0002] Long-lasting luminescent material is a kind of material that absorbs energy and can continue to emit light after the excitation stops, and it is a material with application prospects. The raw materials of existing long-lasting luminescent materials can be divided into aluminate-based, silicate-based and the like. [0003] After a massive search, the prior art was found. The publication number is CN1718670, which discloses a method for preparing ultra-fine aluminate-based long-lasting luminescent materials by sol-gel method, which belongs to the preparation of ultra-fine strontium aluminate-based long-lasting luminescent materials. technology field. Using citric acid as a chelating agent, inorganic aluminum salts, strontium or calcium, barium salts, rare earth ox...

AI Technical Summary

Problems solved by technology

[0004] In summary, the existing methods for preparing long-lasting luminescent materials include high-temperature solid-phase method, combustion method, sol-gel method, microwave radiation method and co-precipitation method, among which high-temperature solid-phase method is the most widely used and has a process flow It has the advantages of simplicity, convenient operation, and low cost, but it also has the disadvantages of high temperature required, long burning time, and large crystal grains. Grinding, and the shape of the crystal will change during the ball milling process, which will affect the luminous performance and reduce the luminous brightness