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The Luminescence Properties of Eu2+ Ions Doped in SrO-B2O3-Li2O Glasses and Glass-Ceramics
Yanlin Huang,Chuanfang Jiang,조은진,이호섭,장기완,이성수 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.4
Eu3+-doped-strontium-borate-lithium glasses with the composition 13.5SrCO3 : 83H3BO3 : 3Li2CO3 : 0.5Eu2O3 were prepared by using a quenching method. The glass-ceramic sample was obtained by annealing of the as-made glasses in air, which led to the glass matrix having bulk crystallinity and resulted in a mixture of poly-crystals. The luminescence optical properties, together with the optical absorption, XRD patterns and SEM micrograph, were investigated. The as-made glasses had two kinds of Eu ions, Eu2+ and Eu3+. Compared with the reported results for strontium borate glasses, the studied glasses had an enhanced Eu2+ emission. The re-crystallined glass-ceramics reduced almost all of the Eu3+ to Eu2+. Charge compensation is proposed to explain the reduction of Eu3+ ions to Eu2+ ions.