A modified solution combustion method to superfine Gd_2O_3:Eu~(3+) phosphor:preparation,phase transf

• 作 者: 叶信宇 高文贵 夏李斌 聂华平 庄卫东
• 机 构: School of Material and Chemistry Engineering,Jiangxi University of Science and Technology,National E
• 出 处: Journal of Rare Earths
• 发表日期: 2010年03期
• 关键词: combustion phosphor cubic monoclinic correlative excitation luminescent annealin

Cubic and monoclinic Gd2O3:Eu3+ phosphors in the range of nano-scale and submicron-scale were prepared by a modified solution combustion method.Coexistence of cubic and monoclinic phases was found in the highest luminescent sample synthesized at 600 oC.In relation to commercial sample,the relative luminescence intensity was 49.8%.The shape of emission spectrum of the sample thus changed and the charge-transfer-state band of excitation spectrum slightly shift toward higher energies.With increasing the annealing temperature,phase transformation and correlative optical properties of Gd2O3:Eu3+ phosphors were studied.It was found that the samples were dominated by cubic structure and monoclinic structure at temperatures below and above 900 oC.

Cubic and monoclinic Gd2O3: Eu3 + phosphors in the range of nano-scale and submicron-scale were prepared by a modified solution combustion method. Coexistence of cubic and monoclinic phases was found in the highest luminescent sample synthesized at 600 o C. In relation to commercial sample , the relative luminescence intensity was 49.8%. The shape of the emission spectrum of the sample thus changed and the charge-transfer-state band of excitation spectrum slightly shift toward higher energies. With increasing the annealing temperature, phase transformation and correlative optical properties of Gd2O3 : Eu3 + phosphors were studied .It was found that the samples were dominated by cubic structure and monoclinic structure at temperatures below and 900 oC.