人工晶体学报2013，Vol.42Issue(7)：1323-1329,7.
微波辅助溶胶-凝胶法合成红色发光材料NaLa(MoO4)2∶Eu3+及其发光性能研究
Synthesis and Luminescent Properties of Red-emitting Phosphors NaLa (MoO4)2∶Eu3 + by Microwave-assisted Sol-gel Method
摘要
Abstract
The red-emitting phosphors NaLa(MoO4) 2∶Eu3 + was synthesized by microwave-assisted sol-gel method using citric as complexing agent.These compounds were characterized by means of thermo gravimetric-differential thermal analysis,fourier transform infrared spectroscopy,X-ray diffraction,scanning electron microscope and fluorescence spectrophotometer.The results show that the target products NaLa (MoO4)2∶Eu3 + have been synthesized by calcining precursor at the temperature from 700 ℃ to 900 ℃.The obtained products are of pure scheelite type molybdate with tetragonal crystal structure.The particles of NaLa(MoO4)2∶Eu3+ are spherical in shape with a diameter of 1-3 μm.The excitation spectrum of NaLa(MoO4)2∶Eu3+ has a broad band in the range of 250-350 nm,and the main peak is at 290 nm.The broad band can be ascribed to the charge transfer band of Mo-O and Eu-O.The sharp lines in 350-500 nm range are due to 4f-4f transitions of Eu3 +.The emission spectrum contains a series of narrow peaks,with the main peak at 616 nm originated from the electric dipole transition of 5D0 →7F2 of Eu3+.Meanwhile,the influences of reaction temperature and time,molar ratio of citric and EG,and flux on the fluorescent properties of as-prepared samples were also investigated.关键词
NaLa(MoO4)2∶Eu3+/微波辅助溶胶凝胶法/红色荧光粉Key words
NaLa(MoO4)2∶Eu3+ / sol-gel method assisted by microwave/ red-emitting phosphors分类
数理科学引用本文复制引用
翟永清,马健,胡志春,赵佳佳,崔瑶轩,宋珊珊..微波辅助溶胶-凝胶法合成红色发光材料NaLa(MoO4)2∶Eu3+及其发光性能研究[J].人工晶体学报,2013,42(7):1323-1329,7.基金项目
国家自然科学基金(20675023) （20675023）
