J. Mater. Sci. Technol. ›› 2016, Vol. 32 ›› Issue (10): 1066-1070.DOI: 10.1016/j.jmst.2016.08.012

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Preparation and Characterisation of Sr2CeO4:Eu3+ Rare Earth Luminescent Material by High Temperature Mechano-Chemical Method

Yang Xue1,Shao Zhongbao2,*(),Ru Hongqiang1   

  1. 1 School of Materials Science and Engineering, Northeastern University, Shenyang 110004, China
    2 College of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2016-04-25 Accepted:2016-05-16 Online:2016-10-10 Published:2016-11-05
  • Contact: Shao Zhongbao

Abstract:

A novel, high-temperature, mechano-chemical (HTMC) method was developed to synthesise single-phase Sr2CeO4:Eu3+ phosphor. Phosphors were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), and luminescence spectra. Compared with phosphors prepared by the traditional high-temperature solid state method and citric acid gel method, single-phase Sr2CeO4:Eu3+ powders by using the HTMC method, with small average particle sizes of about 5 μm, a narrow size distribution range and uniform dispersion, were prepared at 800 °C, and reached their maximum luminescent intensity at 900 °C. Under ultraviolet excitation at 298 nm, the sample showed good luminescence with the strongest red light of 616 nm. However, Sr2CeO4:Eu3+ was prepared at the higher temperature of 1100 °C by solid state method and citric acid gel method. The particle size was too large and uneven with phosphor agglomeration by high-temperature solid state method. The luminescent intensity reached a maximum for Sr2CeO4:Eu3+ phosphor at a synthesis temperature of 1100 °C by using the high-temperature solid state method, and at 1200 °C by both citric acid gel and chemical precipitation methods. Furthermore, the advantages of the Sr2CeO4:Eu3+ powder prepared by HTMC method were discussed compared with that prepared using traditional high-temperature solid state and citric acid gel methods.

Key words: Sr2CeO4:Eu3+, High-temperature mechano-chemical method, High-temperature solid state method, Citric acid gel method