The Phosphors Yag: Ce Was Prepared By Low-temperature Combustion Synthesis And Sinterabilitys

The phosphors YAG:Ce³⁺doped with Pr3+was prepared by low-temperaturecombustion synthesis method, process with A1（NO3）3·9H2O, Y（NO3）3·6H2O andCe（NO3）3·6H2O as oxidant and urea as reducing agent. The structure,morphology andluminescence properties of YAG:Ce³⁺ultrafine phosphors were systematic studied by XRD,SEM and luminescence spectrum.. The best amount of doped Ce³⁺and urea were confiemed.Influences of luminescence after calcinations at1200℃for2hours were studied. YAGceramic was sintered with the sintering aids of glass state. YAG ceramic was sintered with thesintering aids of glass state. The properties of YAG:Ce³⁺sintered were studied by the linearshrinkage rate, structure,morphology and luminescence properties.The results show that:1.The pure YAG:Ce³⁺phosphors without any impurity was prepared by thelow-temperature combustion synthesis method, even at450℃.2.The photoluminescence spectrum of crystalline YAG:Ce³⁺phosphors showed theemission intensity of phosphor reached its maximum as the molar fraction of Ce³⁺was0.06.So the best proportion is Y2.94Ce0.06Al5O12.3.And when The urea-doping concentration was the1molar ratio with thestoichiometric YAG:Ce³⁺composition, emitting intensity will be the highest.4. The YAG:Ce³⁺phosphors with pure phase was obtained after calcinations at1200℃for2hours. It was found that a decrease of luminescence intensity was observed due tothe calcination.5. The properties of YAG:Ce³⁺sintered concerned with sintering temperature, contentsof sintering aids and the heat preservation time. The best result was achieve when thesample was sintered at1500℃for4hoursand doped sintering aids of1%.