微波辅助溶胶燃烧法制备Sr_2MgSi_2O_7:Tb^(3+)荧光粉

Microwave-assisted gel-combustion method synthesis Sr_2MgSi_2O_7:Tb^(3+) phosphor

采用高温固相法和微波辅助溶胶燃烧法分别合成了Sr2MgSi2O7:Tb3+荧光粉。通过综合热分析、X射线衍射(XRD)、扫描电镜(SEM)和光谱分析等手段对试样进行表征.结果表明:微波辅助溶胶燃烧法合成的Sr2MgSi2O7:Tb3+荧光粉颗粒大小均匀,呈类球形,且合成温度比固相法降低了700℃;Sr2MgSi2O7:Tb3+荧光粉的激发光谱在300~500nm之间,主峰位于377nm处,在377nm近紫外光激发下,采用微波辅助溶胶燃烧法合成的Sr1.995MgSi2O7:005Tb3+荧光粉比高温法合成样品的发射强度高.

Sr2MgSi2O7：Tb^3＋ phosphor was separately synthesized by solid-state method and microwave-assisted gel-combustion method. The structure, morphology and spectrum properties were characterized by thermogravimetric differential scanning calorimeter （TG-DSC）,X- ray diffraction（XRD）,scanning electron microscopy （SEM） and photoluminescence and photoluminescence excitation（PL-PLE） spectrum, respectively. The results reveal that,by using microwave-assisted gel-combustion method, Sr2MgSi2O7 ： Tb^3＋ phosphors can be synthesized under lower 700 ℃ when compared with the traditional solid-state method, the powder have a uniform spherical particle size. The maximum excitation peak locate in the vicinity of 377 nm. Under 377 nm near ultraviolet excitation, the emission intensity of Sr1. 995 MgSi2O7 ： 005 Tb^3＋ synthesized by microwave-assisted gel-combustion method is higher synthesized by solid-state method