中国稀土学报（英文版）
中國稀土學報（英文版）
중국희토학보（영문판）
JOURNAL OF RARE EARTHS
2000年
3期
182-185
,共4页
rare earths%europium%CaYBO4%lattice displacement%luminescence
CaY1-xBO4:xEu was synthesied by solid state reaction method, and the displacement and luminescence of the Eu3+ in CaYBO4 host were studied. Two luminescent centers could be observed at certain Eu3+-concentration, indicating that the Eu3+ occupies two different crystallographic sites. This result shows that the Eu3+ occupies two different Y3+ sites in CaYBO4. The investigation on Eu-O charge transfer bands indicates that the larger distortion or the lower symmetry of Eu3+ site is,the shorter wavelength of the Eu-O charge transfer band is. When the Eu3+-concentration is high (x＞0.10), Eu3+ occupies the sites of Ca2+ and is reduced to Eu2+.
