【摘要】 本文利用化学燃烧合成法制备了Al₂O₃:Eu,Al₂O₃:Tb和Al₂O₃: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Al₂O₃陶瓷粉末光致发光性能的影响.结果表明:采用Al（NO3）3、Eu（NO₃）₃、Tb（NO₃）₃为原料制备的Al₂O₃:Eu,Al₂O₃: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Al₂O₃:Tb:Eu陶瓷粉末时,只改变Tb³⁺离子的掺杂浓度而保持Eu³⁺离子的掺杂浓度是0.04mol%固定不变.随着Tb³⁺离子掺杂浓度的增大,Eu³⁺离子处于592nm,618nm,653nm,705nm的光致发光峰强度增加,而Tb³⁺离子在545nm处的光致发光峰强度却随着Tb³⁺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Al₂O₃基陶瓷材料的发光性能提供一定的实验依据.更多还原

【Abstract】 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, Eu³⁺ions concentration are kept at 0.04 mol% and Tb³⁺ concentrations are varied. The results show that the photoluminescence peak intensity of Eu³⁺ ions at 592 nm,618 nm, 653 nm and 705 nm increases with the increase of the Tb³⁺ ions concentration, while the emission peak intensity of Tb³⁺ ions at 545 nm gradually decreases with the increase of Tb³⁺ 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.更多还原