掺钴纳米玻璃陶瓷的光谱性质(英文)  

SPECTROSCOPIC PROPERTIES OF COBALT-DOPED NANOSIZED GLASS-CERAMICS

作　　者：段秀兰[1] 袁多荣[1] 潘冬英[1] 李战发[1] 王丽华[1] 

机构地区：[1]山东大学,晶体材料国家重点实验室,济南250100

出　　处：《硅酸盐学报》2006年第3期362-365,共4页Journal of The Chinese Ceramic Society

摘　　要：采用溶胶-凝胶法分别制备和表征了绍分为5ZnO（5MgO，5Li2O）-6Al2O3—89SiO2—0．4CoO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，Co^2＋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Co^2＋的存在是产生这些吸收和发光峰的主要原因。Co^2＋-doped zinc-, magnesium- and lithium-aluminosilicate glass-ceramics containing nanocrystals were prepared by heating the gels composed of 5ZnO （or 5MgO, or 5Li2O）-6Al2O3 -89SiO2 -0.4CoO at 900, 1 000℃ and 850 ℃, respectively. The crystallite size of the nanocrystals in the glass-ceramics was 10-30 nm. Absorption and emission properties of Co^2＋- doped glass-ceramics were studied. These glass-ceramics have similar absorption and emission characteristics in the visible and near infrared regions. The observed absorption and emission peaks are attributed to the tetrahedral coordinated Co^2＋ ions in ZnAl2O4, MgAl2O4, and β- spodumene nanocrystals, respectively.

关 键 词：纳米晶 溶胶-凝胶 吸收和发光光谱 掺钴 

分 类 号：TB321[一般工业技术—材料科学与工程]