The Ce^3＋and Dy3＋ co-doped fluorosilicate glass and glass ceramics containing SrF2 or CeF3 nanocrystals were prepared under reducing atmosphere. The precipitated nano-crystalline phase shifted from cubic SrF2 to hex...The Ce^3＋and Dy3＋ co-doped fluorosilicate glass and glass ceramics containing SrF2 or CeF3 nanocrystals were prepared under reducing atmosphere. The precipitated nano-crystalline phase shifted from cubic SrF2 to hexagonal CeF3 gradually with the heat treatment temperature increasing flom 620 to 680 ℃. The glass and glass ceramics emitted white light, deriving from a combination of the Ce3＋ blue and the Dy3＋ yellow light. The CIE coordinates could be tuned by adjusting the ratio of Ce3＋/Dy3＋ concentration. The luminescence could be enhanced significantly by annealing the samples at the temperatures lower than 640℃.展开更多
基金Project supported by National Natural Science Foundation of China (50902120)the Research Fund of the Doctoral Program of Higher Education of China (20100101120025)+1 种基金the Science and Technology Innovative Research Team of Zhejiang Province (2009 R50010)Program for Changjiang Scholars and Innovative Research Team in University
文摘The Ce^3＋and Dy3＋ co-doped fluorosilicate glass and glass ceramics containing SrF2 or CeF3 nanocrystals were prepared under reducing atmosphere. The precipitated nano-crystalline phase shifted from cubic SrF2 to hexagonal CeF3 gradually with the heat treatment temperature increasing flom 620 to 680 ℃. The glass and glass ceramics emitted white light, deriving from a combination of the Ce3＋ blue and the Dy3＋ yellow light. The CIE coordinates could be tuned by adjusting the ratio of Ce3＋/Dy3＋ concentration. The luminescence could be enhanced significantly by annealing the samples at the temperatures lower than 640℃.
