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采用溶胶凝胶法分别制备和表征了组分为5ZnO(5MgO,5Li2O)6Al2O389Si O20.4CoO的掺钴硅酸铝锌(镁,锂)纳米玻璃陶瓷材料。这3种玻璃陶瓷的结晶温度分别为900,1000℃和850℃,对应的结晶相分别为ZnAl2O4,MgAl2O4和β锂辉石、方石英,晶粒度在10~30nm之间。主要研究了纳米玻璃陶瓷的吸收和发光性质,它们在可见光及近红外区域具有相似的吸收和发光特性。在这3种纳米玻璃陶瓷中,Co2+分别占据ZnAl2O4,MgAl2O4及β锂辉石纳米晶的四面体晶格位置,四面体配位Co2+的存在是产生这些吸收和发光峰的主要原因。
Zinc-doped (Mg, Li) nano-glass ceramic materials with 5ZnO (5MgO, 5Li2O) 6Al2O389SiO20.4CoO were prepared and characterized by sol-gel method. The crystallization temperatures of the three kinds of glass ceramics are 900, 1000 ℃ and 850 ℃, respectively. The corresponding crystalline phases are ZnAl2O4, MgAl2O4 and β spodumene, cristobalite, and the grain size is between 10 and 30 nm. The absorption and luminescence properties of nano-glass ceramics are mainly studied. They have similar absorption and luminescence properties in the visible and near-infrared regions. Among the three kinds of nano-glass ceramics, Co2 + occupies tetrahedral lattice sites of ZnAl2O4, MgAl2O4 and β-spodumene nanocrystals, respectively. The existence of tetrahedral coordination Co2 + is the main reason for these absorption and emission peaks.