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采用溶胶-凝胶法,利用离子交换树脂法制备的硅溶胶作为硅源,在比传统的高温固相反应法低得多的温度下,首次合成了0.89MgO-2.5SiO_2:0.04Eu~(3+),0.015Bi~(3+)和0.88MgO-2.5SiO_2:0.04Eu~(3+)0.02Bi~(3+)(加入 Li~+作为电荷补偿剂)发光体,并得到了最佳合成条件.利用 X-射线粉末衍射结构分析,确定了发光体的晶体结构.通过激发光谱和发光光谱的测试.研究了发光体在不同激发波长激发下的发光特性以及在激活剂、敏化剂不同掺杂量的情况下的发光行为。讨论了在 MgO-SiO_2基质中 Bi~(3+)对 Eu~(3+)的能量传递和敏化作用。
The sol-gel method was used to synthesize 0.89MgO-2.5SiO 2: 0.04Eu ~ (3) at the much lower temperature than the traditional high-temperature solid state reaction using the silica sol prepared by ion exchange resin as the silicon source. +), 0.015Bi ~ (3+) and 0.88MgO-2.5SiO_2: 0.04Eu ~ (3+) 0.02Bi ~ (3 +) with Li ~ + as charge compensation agent, and the best synthesis The crystal structure of the luminophore was determined by X-ray powder diffraction (XRD) .According to the excitation and emission spectra, the luminescence properties of the luminophore under different excitation wavelength and the effect of the activator and the sensitizer The amount of doping in the case of light-emitting behavior. The energy transfer and sensitization of Eu ~ (3 +) to Bi ~ (3+) in MgO-SiO_2 matrix were discussed.