Silicate Long Afterglow Phosphor And Its Application In The Glaze

Luminescent material has long been a hot research field because of its extensive application. In recent years, silicate long afterglow luminescent material of (Sr,Ca)1.945MgSi2O7:Eu2+,Dy3+has gotten more and more attention, for its good chemical properties and physical properties, which has been a hotspot to improve this material's performance and application.This paper discusses the influnce of different raw materials and the pretreatment of raw materials on synthesizing system and luminescent performance. The results show that presintering, increasing milling time, application of nano-SiO2or melting-SiO2could improve phophor's long afterglow properties. The use of strontium nitrate as raw material or pretreatment raw materials with ammonium nitrate solvent can reduce the synthesis temperature of the phosphor.The long afterglow process includes two centers, the luminescence center and the trap center. The energy transfer between two centers is the main cause of long afterglow. The trap center of the long afterglow material comes mainly from auxiliary activator. Different auxiliary activator makes the luminescent phosphor have different trap level. Thus, this article mainly studies the effects on (Sr,Ca)1.945MgSi2O7:Eu2+Materials for single doped auxiliary activator and mixed doped auxiliary activator. Research shows that phosphor doped with La3+, Dy3+or Ce3+, Dy3+have the best performance.In order to confirm the application field and application environment of this material, we tested its application performance, such as water resistance, thermal stability and mechanical properties. This material has good water resistance and alkali resistance. However, when soaked in hydrochloric acid or nitric acid this phosphor is easy to lose luminescent property.The (Sr,Ca)1.945MgSi2O7:Eu2+,Dy3+,La3+material's use in ceramic glaze has been studied. We confirmed the basic glaze of luminescent glaze based on the thermal stability of the phosphor. To the end, we discussed the influence of particle size and addition amount of long afterglow phosphor, particle size of basic glaze, addition amount of the CMC and burning regulations on luminescent ceramic glaze.