Preparation of Luminescent Lanthanide Materials SrMoO4: Eu3+ by Chemical Precipitation Method
Ultrafine luminosity red phosphors SrMoO4: Eu3+ powders were prepared by chemical precipitation method. The precursors were synthesized by using chemical precipitation method and choosing ammonium molybdate, strontium nitrate and europium oxide as raw materials. According to the TG-DTA curves, the hot decomposition of precursor was analysed, and the reasonable calcinations temperature of powders was determined. Different SrMoO4:Eu3+ powders were prepared by controlling the pH value of solution and changing, the sintering temperature and the doping concentration of Eu3+. The SrMoO4:Eu3+ products were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM) and excitation-emission spectra. Experimental results showed that the best preparation techniques of SrMoO4:Eu3+ powders were pH≈7, precipitation temperature at 80℃, sintering temperature at 800℃ for 2h and concentration of Eu doped for 12％mol. Under the same measure conditions, its obvious that the more increasing of pH value, sintering temperature or Eu3+ doped dosage, the less luminescence characteristics of SrMoO4:Eu3+ powders. The SrMoO4:Eu3+ powders have considerable luminescent intensity prepared under the best techniques. Their excitations take on a double peak structure which locates at ultraviolet (394nm) and visible blue light (464nm). The emission is a line spectrum and the main peak located at visible red light (616nm). The SrMoO4: Eu3+ powders are a well luminosity red phosphors with intense absorption among the blue LEDs chips and the UV LEDs chips.
LEDs SrMoO4:Eu3+ powders Luminescent materials Chemical precipitation method
Chen Xuebing Shao Zhongbao Tian Yanwen
College of Material and Metallurgy, China No.11, Lane 3, Wenhua Road, Heping District, Shenyang, 110 College of Sciences Northeastern University, China No.11, Lane 3, Wenhua Road, Heping District, Shen
国际会议
沈阳
英文
202-205
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）