• Combustion synthesis and properties of fine particle fluorescent aluminous oxides

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    • Keywords

       

      Ruby powder; combustion synthesis; urea; carbohydrazide; aluminium nitrate; metal nitrates; lasers; TV phosphors; fluorescent aluminous oxides

    • Abstract

       

      Fine particle fluorescent aluminous oxide materials like Cr3+-doped α-Al2O3 (ruby), MgAl2O4, LaAlO3, Y3Al5O12 and Ce3+-doped Y3Al5O12, LaMgAl11O19, CaAl12O19 and CeMgAl11O19 have been prepared by the combustion of the corresponding metal nitrate-aluminium nitrate-urea/carbohydrazide mixtures at 500°C in less than 5 min. Formation of these Cr3+- and Ce3+-doped aluminous oxides has been confirmed by their characteristic XRD, colour, UV-visible and fluorescence spectra as well as decay time measurements. Ruby (Cr3+/α-Al2O3) powder showed characteristic excitation bands at 406 and 548 nm and emission band at 695 nm with the decay time of 3·6 ms.

    • Author Affiliations

       

      J J Kingsley1 N Manickam1 2 K C Patil1

      1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore - 560 012, India
      2. Department of Physics, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

       
  • Bulletin of Materials Science | News

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