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1μm以内,分布较均匀;样品可以很好地吸收紫外光,在244 nm左右的氙灯激发下,发射波长主要为592 nm,Eu3+离子主要处在严格对称的格位上,属于红色发光。
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 coul...
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2009年第1期118-122,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
四川省科技厅应用基础项目资助(2006J13-059)
