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工程科学与技术:2009,41(1):118-122
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CaO∶Eu3+,Li+红色荧光粉的制备
(四川大学 材料科学与工程学院,四川 成都610065)
The Preparation of CaO∶Eu3+, Li+ Red Phosphor Powder
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投稿时间:2008-01-22    
中文摘要: 以CaCO3为主要原料,使用湿化学法制备前驱物,在850 ℃高温煅烧前驱物制备CaO∶Eu3+,Li+的红色稀土荧光粉。用XRD、SEM、激光粒度、拉曼光谱仪、紫外 可见光谱仪和荧光光谱仪等分别对样品的物相、形貌、粒度和光谱性质进行表征。结果表明,掺杂Eu3+和Li+分别作为激活剂和敏化剂进入CaO的晶格中,同时Li+的掺杂可以促进Eu3+进入CaO晶格,有效地增强了能量在O2-与 Eu3+间的传递,使Eu3+的发光显著增强。晶体颗粒为近球形且粒径在1 μm以内,分布较均匀;样品可以很好地吸收紫外光,在2
中文关键词: CaO∶Eu3+,Li+  发光  湿法
Abstract:CaCO3 was chosen as main raw material, and wet chemical method was used for the preparation of precursor. According to TG SDTA analysis, the precursor was directly calcined at 850 ℃ for 2 h to obtain CaO∶Eu3+, Li+. The structure, morphology and spectra properties of the samples were characterized by XRD, laser particle size analyzer, SEM, FT IR, Raman, UV and PL PLE spectra, respectively. The results showed that the Eu3+ ions as a luminescent center substituted Ca2+ ions into the lattice, and the cubic CaO structure could be maintained. Li+ ion as sensation was helpful to the energy transfer between O2- and Eu3+, and could enhance the luminescence. The size of particles was 0.5~1.0 μm. The obtained sample could emit the light with the wave length of 592 nm (5D07F2 ) under the radiation of the ultraviolet light with the wavelength of 244 nm, which indicated that Eu3+ ions mainly located in strict symmetric position of the crystal lattice and belonged to red luminescence.
文章编号:20090108     中图分类号:    文献标志码:
基金项目:四川省科技厅应用基础项目资助(2006J13 059)
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康明,尹光福,廖晓明.CaO∶Eu3+,Li+红色荧光粉的制备[J].工程科学与技术,2009,41(1):118-122.
.The Preparation of CaO∶Eu3+, Li+ Red Phosphor Powder[J].Advanced Engineering Sciences,2009,41(1):118-122.