Investigations into thermoluminescence and afterglow characterization of strontium aluminates with boron-modification and reductions via sol-gel route
来源期刊：Journal of Rare Earths2012年第10期
论文作者：陈一诚 陈克恭 陈弘森 杜哲光 林昭任 林秀雄 陈登铭 谢天渝
文章页码：972 - 978
摘 要：The effects of strontium aluminates of SrAl2O4:Eu2+,Dy3+（SAED） and boron-modified SAED （BSAED） phases synthesized from a sol-gel process on thermoluminescence （TL） along with their afterglow properties were systematically investigated with thermal activation in the different atmospheres. The result showed that the addition of boron and the reduction routes of Eu3+to Eu2+ in SrAl2O4:Dy3+were related to phosphorescent decay properties. The aid of Dy3+to induce the hole-trapping effect required both SAED and BSAED to be heated at 1300°C under the H2/N2（5%:95%） atmosphere. However, the trapping behavior of the reductions of SAED in nitrogen was similar to the compound without Dy3+co-doping SrAl2O4:Eu2+ （SAE） in H2/N2（5%:95%）. BSAED showed deeper traps in situ compared to SAED which contained no boron, and this led to the better afterglow properties of BSAED than those of SAED. The afterglow spectrum of BSAED showed two peaks at 400±1 nm and 485±1 nm, which were two individuals composed and contributed from different depths of traps at 0.57 and 0.76eV, accordingly. The depth of the traps was calculated from the Hoogenstraaten’s plot of glow curves. The calculations for SAED and SAE were at around 0.43 and 0.18eV, respectively.
陈一诚1，陈克恭2，陈弘森2，杜哲光2，林昭任3，林秀雄4，陈登铭5，谢天渝2
1. Material Applications Center/IS, Industrial Technology Research Institute2. College of Dental Medicine, Kaohsiung Medical University3. Chemical Engineering Department, National Chung-Cheng University4. Orthodontic Division, Department of Dentistry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine5. Applied Chemistry Department, National Chiao Tung University
摘 要：The effects of strontium aluminates of SrAl2O4:Eu2+,Dy3+（SAED） and boron-modified SAED （BSAED） phases synthesized from a sol-gel process on thermoluminescence （TL） along with their afterglow properties were systematically investigated with thermal activation in the different atmospheres. The result showed that the addition of boron and the reduction routes of Eu3+to Eu2+ in SrAl2O4:Dy3+were related to phosphorescent decay properties. The aid of Dy3+to induce the hole-trapping effect required both SAED and BSAED to be heated at 1300°C under the H2/N2（5%:95%） atmosphere. However, the trapping behavior of the reductions of SAED in nitrogen was similar to the compound without Dy3+co-doping SrAl2O4:Eu2+ （SAE） in H2/N2（5%:95%）. BSAED showed deeper traps in situ compared to SAED which contained no boron, and this led to the better afterglow properties of BSAED than those of SAED. The afterglow spectrum of BSAED showed two peaks at 400±1 nm and 485±1 nm, which were two individuals composed and contributed from different depths of traps at 0.57 and 0.76eV, accordingly. The depth of the traps was calculated from the Hoogenstraaten’s plot of glow curves. The calculations for SAED and SAE were at around 0.43 and 0.18eV, respectively.
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