Synthesis and characterization of monodispersed BaSO4/Y2O3:Eu3+ core–shell submicrospheres

✍ Scribed by Ming Zhang; Xinhai Li; Zhixing Wang; Huajun Guo; Jinhui Li; Wanrong Liu

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 311 KB
• Volume: 195
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2009.04.004

✦ Synopsis

Spherical BaSO 4 particles have been coated with Y 2 O 3 :Eu 3+ phosphor layers (BaSO 4 /Y 2 O 3 :Eu 3+ ) by the wet chemical method. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dipersive spectroscopy (EDS), photoluminescence spectra were utilized to characterize the BaSO 4 /Y 2 O 3 :Eu 3+ core-shell-structured phosphor particles. The obtained core-shell phosphors consist of well dispersed submicron spherical particles with narrow size distribution. XRD result shows that no reaction occurred between the BaSO 4 cores and the Y 2 O 3 :Eu 3+ shells even after annealing at 1400 °C. TEM and EDS results show that BaSO 4 particles are well coated with the shell of Y 2 O 3 :Eu 3+ . The BaSO 4 /Y 2 O 3 :Eu 3+ core-shell particles show a red emission corresponding to 5 D 0 -7 F 2 of Eu 3+ under the excitation of ultraviolet.