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投稿时间：2007-10-25
投稿时间：2007-10-25
中文摘要: 采用高温固相法，合成CaO∶Eu3+,Na+等一系列红色荧光粉。研究煅烧温度和Eu3+、Na+离子的掺杂量对样品发光性能的影响，并对样品的物相、激发和发射光谱进行分析。结果表明，当前驱物的煅烧温度在950 ℃以上时，分别作为激活剂和敏化剂的Eu3+和Na+离子全部进入到CaO晶格中并占据Ca2+的位置，其最佳掺杂量分别为1.5 mol%和10 mol%；Na+离子的掺杂不仅有利于基质的稳定，而且可以提高样品的发光强度；煅烧温度升高有助于样品发光强度的提高；在波长为200~400 nm氙灯的激发下，最强激发峰值为244 nm，属于Eu3+-O2-的电荷迁移跃迁；最大发射峰值位于592 nm，对应于Eu3+离子的5D0→7F1跃迁，并且Eu3+离子在CaO基质中主要处于严格对称中心的格位上。
中文关键词: 红色荧光粉 CaO∶Eu3+,Na+ 高温固相法 掺杂
Abstract:A red emitting phosphor, CaO∶ Eu3+, Na+, was synthesized by high solid state method. The effects of the sinter temperature, the Eu3+, Na+ doping concentration on luminescent properties were studied by TG/SDTA, XRD and photoluminescence(PL) spectra. The results indicated that when the sinter temperature preponderates over 950 ℃, Eu3+and Na+, which act as luminescent and sensation, respectively, probe into crystal lattice of CaO. And the optimal concentrations of Eu3+ and Na+ are 1.5 mol% and 10 mol%, separately. Na+ ion, not only improves the stability of the host, but also effectively enhances the luminescent properties of patterns. The emission intensities of samples increase with the increase of firing temperature because crystalline of phosphor is improved. The maximum excitation presents a broad band peaked at 244 nm, due to the Eu3+-O2- charge transfer band by the wavelength of 200~400 nm excitation under xenon lamp; The maximum emission wavelength is 592 nm, corresponding to 5D0 7F1 of Eu3+, indicating that the Eu3+ ion locates in a symmetric position.
文章编号：20080214 中图分类号： 文献标志码：
基金项目:四川省科技厅资助项目(2006J13-059);四川省教育厅资助项目(2006A094)
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引用文本：
康明,刘军,孙蓉.高温固相法合成CaO∶Eu3+,Na+红色荧光粉的研究[J].工程科学与技术,2008,40(2):71-75.
.Study on the Preparation of Red Phosphor CaO∶Eu3+,Na+ by High Solid state MethodKANG Ming1,2，LIU Jun1，SUN Rong1,YIN Guang fu2[J].Advanced Engineering Sciences,2008,40(2):71-75.
引用文本：
康明,刘军,孙蓉.高温固相法合成CaO∶Eu3+,Na+红色荧光粉的研究[J].工程科学与技术,2008,40(2):71-75.
.Study on the Preparation of Red Phosphor CaO∶Eu3+,Na+ by High Solid state MethodKANG Ming1,2，LIU Jun1，SUN Rong1,YIN Guang fu2[J].Advanced Engineering Sciences,2008,40(2):71-75.