Preparation and Characterization of SrAl2O4∶ Eu,Dy Powders
A new method for preparing long afterglow phosphor and properties had been studied in the paper.In the new process the activated Al-Sr alloy powder hydrolyzes in pure water.The hydrolysates contain the mixture of Sr(OH)2·8H2O and Al(OH)3 in main,included a little Al(OH)3,AlOOH,SrCO3,and 3SrO·Al2O3·6H2O.After heat treatment at 700℃ for 1 hour,the mixture of SrO and α-Al2O3,γ-Al2O3 were formed.As a precursor,the hydrolysates after heat treatment had been used to prepare long after phosphor Eu,Dy co-doped SrAl2O4.The crystal structure of hydrolysates and Eu,Dy co-doped SrAl2O4 was analyzed by XRD.The luminescent properties of long afterglow material were studied.The Results showed the emission spectra of Eu and Dy co-doped SrAl2O4 lied near 520nm,resulted from the character transition of 4f5d-4f of Eu2+ ion.The method can improve afterglow properties dramatically.The initial luminescent intensity of long afterglow material reached 18cd/m2,and the duration time lasted 46 h.
Strontium aluminate Long afterglow phosphor Al-Sr alloy Hydrolyze
Jin Hu Kaijun Wang Xiaoqin Zhu Jianliang Liu
Kunming University of Science and Technology,Kunming 650093,China Kunming Institute of Precious metals,Kunming 650221,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
383-385
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）