摘要
用高温高压方法合成了Sr(Eu,Bi)SiO3,Sr(Eu,Bi)2SiO4.研究了高压对其结构及发光性能的影响.与用溶脑—凝胶法和常压高温法合成的产品相比较,常压制备的Sr(Eu,Bi)SiO3为六角结构,而在2.34—4.10GPa的合成压力下,未发现其结构相变.高压能显地改就样品的发光特性.其发光强度和相对量子发光效率降低,半宽明显增加,且伴有红移发生.发光强度的改变是压致晶场的变化引起的.
The Sr2SiO4:Eu3+,Bi3+;SrSiO3:Eu3+,Bi3+samples were synthesized at high temperature and high pressure. The effect of high pressure on the structure and luminescence properties of samples were studied. For the comparison, the samples were also prepared by the method of Sol-Gel and high temperature at atmospheric pressure.The SrSiO3:Eu3+,Bi3+ prepared at atmosphere has a hexagonal phase structure in the pressure range of 2.34-4.10GPa, it transforms into a pseudo-orthorhomic structure(monoclinic), and in the pressure range to 4.15GPa the structure change of Sr2SiO4:Eu3+,Bi3+ has not been observed, it maintains the monoclinic structure of samples synthesized under atmospheric pressure. High pressure makes the luminescence properties of samples change obviously. Intensity and relative quantum luminescent efficiency decrease, half-width increases obviously and red shift occurs. The changes of the luminescence properties is result from the pressure-induced changes of crystal structure.
出处
《吉林师范大学学报（自然科学版）》
2003年第1期1-5,共5页
Journal of Jilin Normal University:Natural Science Edition
基金
ThisworkwassupportedbythescienceandtechnologyBureauofJilinprovince (ItemNo .2 0 0 2 0 615 )andtheoverseas-backscholarprogramofMinistryofPersonnelofChina
