J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (02): 254-258.

• Articles • Previous Articles     Next Articles

Preparation of Gd2O2S:Pr Scintillation Ceramics by Pressureless Reaction Sintering Method

Jingbao Lian1), Xudong Sun1)†, Tie Gao2), Qiang Li3), Xiaodong Li1) and Zhigang Liu1)   

  1. 1) Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
    2) Key Laboratory for EPM of Ministry of Education, Northeastern University, Shenyang 110004, China
    3) College of Materials & Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001, China
  • Received:2008-02-19 Revised:2008-10-08 Online:2009-03-28 Published:2009-10-10
  • Contact: Xudong Sun
  • Supported by:

    the National Natural Science Foundation of China (Grant. No. 50672014)
    the National Science Fund for Distinguished Young Scholars, China (Grant No. 50425413)

Abstract:

Fabrication of Gd2O2S:Pr scintillation ceramics by pressureless reaction sintering was investigated. The 2Gd2O (Gd,Pr)2(SO 4)mH2O precursor was made by hydrothermal reaction using commercially available Gd2O3, Pr6O11 and H2SO4 as the starting materials. Then single phase Gd2O2SO4:Pr powder was obtained by calcining the precursor at 750°C for 2 h. The Gd2O2SO4:Pr powder compacts can be sintered to single phase Gd2O2S:Pr ceramics with a relative density of 99% and mean grain size of 30 μm at 1750°C for 2 h in flowing hydrogen atmosphere. Densification and microstructural development of the Gd2O2S:Pr ceramics were examined. Luminescence spectra of the Gd2O2S:Pr ceramic under 309 nm UV excitation and X-ray excitation show a green emission at 511 nm as the most prominent peak, which corresponds to the 3P0-3H4 transition of Pr3+ ions.

Key words: Scintillation ceramics, Gd2O2S, Pressureless reaction sintering, X-ray excited luminescence (XEL)