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首页> 外文期刊>Materials Science and Engineering >Photoluminescence properties of Y_3Al_5O_(12):Eu nanocrystallites prepared by co-precipitation method using a mixed precipitator of NH_4HCO_3 and NH_3.H_2O
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Photoluminescence properties of Y_3Al_5O_(12):Eu nanocrystallites prepared by co-precipitation method using a mixed precipitator of NH_4HCO_3 and NH_3.H_2O

机译：使用NH_4HCO_3和NH_3.H_2O混合沉淀剂通过共沉淀法制备的Y_3Al_5O_（12）：Eu纳米晶体的光致发光特性

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摘要

Europium-doped yttrium aluminum garnet 0(Y_3Al_5O_(12):Eu, YAG:Eu) nanocrystallites were prepared by calcining the precursors obtained via a co-precipitation method using a mixed solution of NH_4HCO_3 and NH_3.H_2O as the precipitator. The results of XRD, FTIR and thermal analysis showed that phase-pure YAC: Eu without any other phases was obtained at 900 C. TEM results indicated that the particle sizes are 50-100 nm. YAC:Eu nanocrystallites showed four emission bands ascribed to ~5D_0→~7F_1 transition (592 and 597 nm) and ~5D_0→~7F_2 transition (611 and 633 nm) of Eu~(3+), respectively. The intensity of the magnetic dipoie transition (~5D_0→~7F_1) is stronger than that of the electric dipole transition (~5D_0→~ 7F_2). The influence of the precipitators with different molar ratios of NH_4HCO_3 to NH3H2O on the thermal properties of the as-prepared precursors and luminescent properties of the resulting YAG:Eu nanocrystallites was also investigated.
机译：using掺杂的钇铝石榴石0（Y_3Al_5O_（12）：Eu，YAG：Eu）纳米晶体是通过将共沉淀法将NH_4HCO_3和NH_3.H_2O的混合溶液煅烧而制得的，制备出前驱体。 XRD，FTIR和热分析的结果表明，在900℃下获得了没有任何其他相的纯相YAC：Eu。TEM结果表明粒径为50-100nm。 YAC：Eu纳米晶体分别显示四个发射带，分别归因于Eu〜（3+）的〜5D_0→〜7F_1跃迁（592和597 nm）和〜5D_0→~~ 7F_2跃迁（611和633 nm）。磁偶极跃迁的强度（〜5D_0→〜7F_1）比电偶极跃迁的强度（〜5D_0→〜7F_2）强。还研究了不同摩尔比的NH_4HCO_3与NH3H2O的沉淀剂对制备的前体的热性能和所得YAG：Eu纳米微晶的发光性能的影响。

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  • 来源
    《Materials Science and Engineering》 |2010年第1期|41-45|共5页
  • 作者

    Rongjiang Han; Li Wang; Kezheng Chen; Shaobei Yang;

  • 作者单位

    College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzlwu Rd., Qingdao 266042, PR China;

    College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzlwu Rd., Qingdao 266042, PR China;

    College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzlwu Rd., Qingdao 266042, PR China;

    College of Materials Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzlwu Rd., Qingdao 266042, PR China;

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  • 正文语种 eng
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  • 关键词

    Eu-doped Y_3Al_5O_(12); co-precipitation method; nanocrystallite; photoluminescence; mixed precipitator;

    机译：Eu掺杂的Y_3Al_5O_（12）;共沉淀法纳米微晶光致发光混合除尘器;

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