不同形状的铌酸钙基质发光材料的制备与表征

采用传统的高温固相法合成了不同形状的铌酸钙基质发光材料,利用XRD、SEM以及荧光光谱（PL）对样品的结构、形貌与光学性能进行了表征测试。用200~350 nm紫外光激发样品时,可见光区的发射峰位于350~650 nm,呈白光发射,该发射带是由铌酸钙基质的发射峰和Bi3＋离子以及Pr3＋离子的电子轨道跃迁所产生的发射峰组成;同时本文也探讨了不同掺杂条件对发光性能的影响,对所制备材料的发光机理也进行了初步的分析。

Synthesis and Characterization of Different Shapes Calcium Niobate-based Luminescent Materials

Different shapes of calcium nie bate - based luminescent materials were synthesized by using a traditional high- temperature solid method, and the structures, morphologies and optical properties of products prepared were characterized by using XRD, SEM and photoluminescence spectrum （PL）, respectively. The emission band of the samples prepared was at 350 - 650 nm in the visible range under 200 ~ 350 nm UV - light excitation, the emission band of the materials was consisted of the emission peaks of calcium niobate and Bi3 ＋ and Pr3＋ which generated by electronic orbital transition of bismuth ion and praseodymium ion. Meanwhile, the different doping conditions with effect on the optical properties of the samples prepared were also investigated, and the luminescent mechanism of materials prepared was discussed preliminary.