草酸共沉淀法制备的Y2O3:Eu2+发光性能

采用草酸共沉淀法,利用草酸盐的自氧化还原,制得了以Y2O3为基质及Eu2 为发光中心的荧光粉Y2O3:Eu2 .该法煅烧温度低、操作简单,不需要外界置入任何还原性物质,可将高价阳离子Eu3 还原为Eu2 ,降低了反应的危险性和生产成本.对Y2O3:Eu2 的荧光性质进行了表征,并进一步探讨了Eu2 荧光发射主峰产生较大红移现象的原因,以及发光强度与煅烧温度和Eu2 含量的关系.

Photoluminescence of Y2O3:Eu2+ Phosphor Prepared by Oxalic Acid Co-Precipitation Method

In this article,Y_2O_3:Eu~(2 ) phosphor powder is synthesized by self-reduction and oxidation of oxalicates that prepared by oxalic acid co-precipitation method,in which Y_2O_3 is the host material and Eu~(2 ) is the photoluminescent center.This method has a low calcination temperature and simple operation and Eu~(3 ) was reduced to Eu~(2 ) without any reductive materials from outside.This method has lower danger and cost than conventional methods.In this experiment,the photoluminescent properties and mechanism of Y_2O_3:Eu~(2 ) as well as relations between concentration of Eu~(2 ),calcinations temperature and luminescent brightness of Eu~(2 ) at 545 nm in the emission spectra are investigated.