摘要
以方解石为原料 ,使用硫化助熔剂法合成了CaS∶Mn2 + 磷光体 ,根据荧光光谱 ,详细探讨了矿物杂质对其发光性质的影响 ,指出在矿物材料CaS∶Mn2 + 体系中 ,某些杂质离子拓宽了基质的激发带 ,有利于基质吸收能量及基质→Mn2 + 发射中心的能量传递 ,但Fe2 + 、Co2 + 、Ni2 + 等离子降低了Mn2 + 的发射强度 ,尤其是Mn2 + 与它们形成的成对离子中心或离子晶簇 ,降低了局域对称性 ,放宽了Mn2 + 跃迁发射的选择定则 ,加速了材料发光的衰减过程。
Calcite, a mineral raw material, was used for preparing CaS∶Mn\+\{2+\} phosphors by the sulfurizing flux method, and the influence of mineral impurity ions upon luminescence was discussed in detail. In the mineral material CaS∶Mn\+\{2+\} system, the matrix excitation band gets wider in the excitation spectra, which indicates the existence of some impurity ions may be in favor of the matrix absorption and energy transfer from the matrix to Mn\+\{2+\} center. On the other hand, Fe\+\{2+\}, Co\+\{2+\} and Ni\+\{2+\} lower the intensity of Mn\+\{2+\} emission, especially they form paired ion centers and clusters, in which Mn\+\{2+\} must be located at a site of lower local symmetry. The reduction of symmetry partially inhibits the application of the selection rule on transition so as to accelerate the decay process.
出处
《矿物学报》
CAS
CSCD
北大核心
2001年第2期208-212,共5页
Acta Mineralogica Sinica
基金
:国家自然科学基金项目 (批准号 :49770 99)
