摘要
本文利用化学燃烧合成法制备了Al_2O_3:Eu,Al_2O_3:Tb和Al_2O_3:Eu:Tb陶瓷粉末,研究了退火温度和掺杂浓度对稀土元素掺杂Al_2O_3陶瓷粉末光致发光性能的影响.结果表明:采用Al(NO3)3、Eu(NO_3)_3、Tb(NO_3)_3为原料制备的Al_2O_3:Eu,Al_2O_3:Tb陶瓷粉末,其样品随着退火温度的不断升高,发光强度先增强再减弱,光致发光峰位没有发生变化,并且最佳的退火温度分别是900?C、1100?C.随着稀土元素掺杂浓度的不断增大,样品光致发光强度先增强再减弱,最佳的掺杂浓度分别是0.055mol%、0.02mol%.在制备Al_2O_3:Tb:Eu陶瓷粉末时,只改变Tb^(3+)离子的掺杂浓度而保持Eu^(3+)离子的掺杂浓度是0.04mol%固定不变.随着Tb^(3+)离子掺杂浓度的增大,Eu^(3+)离子处于592nm,618nm,653nm,705nm的光致发光峰强度增加,而Tb^(3+)离子在545nm处的光致发光峰强度却随着Tb^(3+)离子掺杂浓度从0.14mol%增大到0.17mol%逐渐减小.此研究可为改善和提高Al_2O_3基陶瓷材料的发光性能提供一定的实验依据.
Al2O3： Eu, Al2O3： Tb and Al2O3： Eu： Tb ceramic powders are prepared by chemical combustion synthesis method and the effect of doping concentration and annealing temperature of the Al2O3 ceramic powder doped with rare earth element on the photoluminescence properties are studied in this paper.The results show that the luminescence intensity of the Al2O3： Eu, Al2O3： Tb ceramic powder which are made with aluminum nitrate, europium nitrate and terbium nitrate as raw materials increases first and then decreases and the photoluminescence peak position does not change with the increase of the sample annealing temperature, and the optimum annealing temperature is 900？C and 1100？C, respectively. With the increase of doping concentration of the rare earth element Eu or Tb, the luminescence intensity increases first and then decreases, and the optimum doping concentration are 0.055 mol% and 0.02 mol%, respectively. In preparation of Al2O3： Tb： Eu ceramic powders, Eu（3＋）ions concentration are kept at 0.04 mol% and Tb（3＋） concentrations are varied. The results show that the photoluminescence peak intensity of Eu（3＋） ions at 592 nm,618 nm, 653 nm and 705 nm increases with the increase of the Tb（3＋） ions concentration, while the emission peak intensity of Tb（3＋） ions at 545 nm gradually decreases with the increase of Tb（3＋） ions concentration from0.14 mol% to 0.17 mol% This study can provide an experimental basis for improving the photoluminescence characteristics of Al2O3-based ceramic materials.
作者
李梦晓
王倩
窦巧娅
皇环环
LI Mengxiao, WANG Qian, DOU Qiaoya, HUANG Huanhuan(School of Physics Science and Technology, Xinjiang University, Urumqi Xinjiang 830046, Chin)
出处
《新疆大学学报（自然科学版）》
CAS
2018年第2期177-181,共5页
Journal of Xinjiang University(Natural Science Edition)
基金
国家自然科学基金项目(11765022)
关键词
Al2O3陶瓷粉末
掺杂
化学燃烧合成法
光致发光
Al2O3 ceramic powder
doping
chemical combustion synthesis method
photoluminescence
