论文部分内容阅读
Long lasting strontium aluminate phosphors were synthesized by means of coated precipitation in the experiment. SrAl 2O 4 monoclinic phase with long afterglow was synthesized at 1 100 ℃ with the aid of H 3BO 3, and the synthetic temperature decreased about 100 ℃—150 ℃ than in solid state reaction. The process of heat treatment was studied by TG-DTA. The phase compositions of powders were analyzed by XRD. The micrographs of the samples were investigated by SEM and the luminescent properties were researched by optical spectrum. The effects of H 3BO 3 on the phase composition and microstructure of the calcined powders were investigated. The results indicated that H 3BO 3 accelerated the formation of SrAl 2O 4 by consuming the intermediate phase. The addition of Dy 2O 3 stimulated the afterglow property due to the increase in the depth of the trap center in the materials.
Long lasting strontium aluminate phosphors were synthesized by means of coated precipitation in the experiment. SrAl 2O 4 monoclinic phase with long afterglow was synthesized at 1 100 ° C with the aid of H 3 BO 3, and the synthetic temperature decreased about 100 ° C to 150 ° C than The process of heat treatment was studied by TG-DTA. The phase compositions of powders were analyzed by XRD. The micrographs of the samples were investigated by SEM and the luminescent properties were developed by optical spectrum. The effects of H 3BO 3 on the phase composition and microstructure of the calcined powders were investigated. The results indicated that H 3BO 3 accelerated the formation of SrAl 2O 4 by consuming the intermediate phase. The addition of Dy 2O 3 stimulated the afterglow property due to the increase in the depth of the trap center in the materials.