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正铌酸镧(LaNbO4)及其掺杂粉体的发光特性

Luminescence Properties of LaNbO4 and (La, Tb)NbO4 Powders

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【作者】 张志力翟洪祥金宗哲周浪

【Author】 Zhang Zhili~(1*), Zhai Hongxiang~1, Jin Zongzhe~1, Zhou Lang~2 (1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. School of Chemistry and Materials Science, Nanchang University, Nanchang 330047, China)

【机构】 北京交通大学机电学院南昌大学化学与材料学院 北京100044北京100044江西南昌330047

【摘要】 采用化学共沉淀法和高温固相法合成制备得到纯的和掺杂Tb的LaNbO4超细粉体,并对其发光性能进行了激发和发射光谱分析。测试表明,LaNbO4可被汞线激发,发射波长处于蓝紫光区;相比高温固相法,化学共沉淀法制备的LaNbO4粉末相对发光强度增加3~4倍;Tb的掺杂使(La,Tb)NbO4粉体在汞线激发下发出黄绿色光,(La,Tb)NbO4的基质络离子NbO6发生淬灭,并对有关机制进行了讨论。

【Abstract】 Ultrafine pure LaNbO4 and doped with Tb powders were prepared through coprecipitation method. Luminescence properties of LaNbO4 and (La, Tb)NbO4 were tested. The results show that LaNbO4 can be exited to emit light of purplish blue band, and the intensity of its emitted light is 3 to 4 times higher than that of LaNbO4 prepared through solid-state reaction method. Doping of Tb leads to emission of yellowish green light at 548 nm, which is over 10 times brighter than that emitted by solid reaction synthesized powders of the same designated composition.

  • 【文献出处】 中国稀土学报 ,Journal of The Chinese Rare Earth Society , 编辑部邮箱 ,2003年S1期
  • 【分类号】O614
  • 【被引频次】5
  • 【下载频次】253
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