摘要
采用溶胶凝胶沉淀法制备了稀土掺杂的笼状结构铝酸盐发光材料。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对样品的物相结构及形貌进行了表征,结果表明:稀土离子的掺入没有改变发光材料的主晶相,已获得具有笼状结构的单相12CaO·7Al_2O_3发光材料,同时稀土离子可能掺入到晶格中。利用荧光光谱仪对样品的发光性能进行了测试,发现在近紫外光激发下掺杂Eu^(2+)离子的样品具有宽带发射峰,最强发射位于448nm左右,对应于Eu^(2+)离子的4f^65d^1→4f^7辐射跃迁,能够在近紫外光激发下发射出红光。另外,12CaO·7Al_2O_3:Tb^(3+)和12CaO·7Al_2O_3:Dy^(3+)能够在近紫外光激发下分别发出绿光和白光。
Cage-like structure and rare earth doped aluminate luminescent material were prepared by sol-gel precipitation method. The phase structure and morphology of the samples were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The results showed： the incorporation of rare earth ions did not change the main crystal phase, cage-like 12CaO ·7Al2O3 luminescent materials has been obtained and rare earth ions may be incorporated into the lattice. Luminescent properties of the samples were tested by fluorescence spectroscopy and found the samples doped with Eu^2＋ has a broadband emission peak in the near-UV irradiation. The strongest transmitter is located around 448nm, corresponding to the 4fS5d1→4f7 radiative transition of Eu%2＋. It can emits red light in the near-UV irradiation. In addition, 12CaO· 7Al2O3：Tb^3＋ and 12CaO· 7Al2O3： Dy^3＋ can glow green and white respectively, in the near-UV excitation.
出处
《安徽化工》
CAS
2016年第1期34-37,43,共5页
Anhui Chemical Industry
基金
中科院化学所开放基金项目(201301)
宁夏自然科学基金项目(项目编号:NZ14010)
