Lu_2O_3∶Eu^(3+)纳米粉末及透明陶瓷的制备及其发光性能

Fabrication and Luminescent Properties of Eu^(3+)-doped Lu_2O_3 Nanopowders and Transparent Ceramics

采用共沉淀法和溶剂热法制备了Lu2O3∶Eu3+纳米粉体,通过X射线衍射谱、傅里叶变换红外光谱和扫描电镜照片,比较了两种方法制备的Lu2O3∶Eu3+粉末的微观结构,测量和比较合成粉体的激发与发射光谱。将获得的Lu2O3∶Eu3+煅烧粉体在不使用任何添加剂的情况下,干压成型制成素坯,先在真空中1 100℃煅烧5 h,氮气氛中1 700℃烧结2 h,再于氮气氛中1 600℃退火10 h获得Lu2O3∶Eu3+透明陶瓷。比较了两种方法制备的Lu2O3∶Eu3+透明陶瓷的透明度和发光性能。测量并讨论了所合成的Lu2O3∶Eu3+透明陶瓷的发光衰减曲线和能级寿命。

Lu2O3∶Eu3＋ nano-powders were prepared by co-precipitation and solvo-thermal methods,respectively.The microstructural evolution of Lu2O3∶Eu3＋ phosphor powders obtained by above two methods were analyzed and compared by means of XRD,FTIR and SEM.The obtained powders without any additive were sintered into transparent ceramics under vacuum at 1 100 ℃ for 5 h and then in nitrogen atmosphere at 1 700 ℃ for 2 h and at 1 600 ℃ for 10 h.The excitation and emission spectra of Lu2O3∶Eu3＋ for the calcined powders and transparent ceramics were respectively measured at room temperature.Transparencies of the obtained transparent ceramics were compared.The fluorescence decay was measured and discussed under different excitation wavelengths for the prepared Lu2O3∶Eu3＋ transparent ceramics.