论文部分内容阅读
以钼酸铵、硝酸钡和三氧化二铕为原料,通过化学沉淀法制备稀土掺杂的发红光材料BaMoO_4:Eu~(3+),并用X射线衍射和激发发射光谱对粉体的结构和发光性能进行了表征。结果表明,获得最强发光BaMoO_4:Eu~(3+)粉体的最佳合成条件是:反应溶液的pH值为6、烧结温度为1000℃以及Eu~(3+)掺杂量(mol分数)为8%。BaMoO_4:Eu~(3+)粉可被394 nm的紫外光和465 nm的可见光有效激发,其发射光谱在616 nm处发光强度最大,是以电偶极跃迁~5D_0→~7F_2为主导地位的红光发射。
The molybdenum oxide, barium nitrate and europium oxide were used as raw materials to prepare BaMoO_4: Eu ~ (3+) rare earth doped red emitting material by chemical precipitation method. The structure of the powder was characterized by X-ray diffraction and excitation emission spectroscopy And luminescent properties were characterized. The results show that the best synthesis conditions for obtaining the strongest luminescent BaMoO_4: Eu 3+ powder are as follows: the pH value of the reaction solution is 6, the sintering temperature is 1000 ℃ and the Eu 3+ doping content ) Is 8%. BaMoO_4: Eu ~ (3+) powder can be effectively excited by 394 nm UV light and 465 nm visible light. The emission spectrum of BaMoO_4: Eu ~ (3+) powder is the largest at 616 nm, dominated by the dipole transition ~ 5D_0 → ~ 7F_2 Red launch.