CAJ | 학술논문

采用溶胶-凝胶法分别制备和表征了组分为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900,1 000℃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10～30 nm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.
채용용효-응효법분별제비화표정료조분위5ZnO(5MgO,5Li2O)-6Al2O3-89SiO2-0.4CoO적참고규산려자(미,리)납미파리도자재료.저3충파리도자적결정온도분별위900,1 000℃화850℃,대응적결정상분별위:ZnAl2O4,MgAl2O4화β-리휘석、방석영,정립도재10～30 nm지간.주요연구료납미파리도자적흡수화발광성질,타문재가견광급근홍외구역구유상사적흡수화발광특성.재저3충납미파리도자중,Co2+분별점거ZnAl2O4,MgAl2O4급β-리휘석납미정적사면체정격위치,사면체배위Co2+적존재시산생저사흡수화발광봉적주요원인.
Co2+-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 Co2+-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 Co2+ ions in ZnAl2 O4, MgAl2 O4, and β- spodumene nanocrystals, respectively.