| 摘要 |
The present invention relates to oxide luminescent materials activated by trivalent thulium and their preparations. The luminescent materials are the compounds with the following general formula: (RE 1-x Tm x ) 2 O 3 , wherein a range of x is 0<x‰¤0.05 and RE is one or two selected from Y, Gd, La, Lu and Sc. These materials are prepared by Sol-Gel method or high temperature solid phase method using metal oxide of Tm 3+ , chloride of Tm 3+ , nitrate of Tm 3+ , carbonate of Tm 3+ or oxalate of Tm 3+ , and one or two of oxide Y 3+ , Gd 3+ , La 3+ , Lu 3+ or Sc 3+ , chloride Y 3+ , Gd 3+ , La 3+ , Lu 3+ or Sc 3+ , nitrate Y 3+ , Gd 3+ , La 3+ , Lu 3+ , or Sc 3+ , carbonate Y 3+ , Gd 3+ , La 3+ , Lu 3+ or Sc 3+ and oxalate of Y 3+ , Gd 3+ , La 3+ , Lu 3+ , or Sc 3+ as raw material. The present oxide luminescent materials activated by trivalent thulium have high stability, color purity and luminous efficiency, and the methods can easily be operated. |
