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凝膠-燃燒法合成(Y,Gd)Al3(BO3)4:Tb3+熒光材料的結(jié)構(gòu)及其發(fā)光性能
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Structure and Luminescence Properties of (Y, Gd)Al3(BO3)4:Tb3+ Phosphors by Gel Combustion Synthesis
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    摘要:

    采用凝膠-燃燒法合成摻Tb3+和Gd3+的四硼酸鋁釔(Y,Gd)Al3(BO3)4:Tb3+熒光粉。分別采用X射線衍射儀(XRD)、掃描電鏡(SEM)、發(fā)光光譜等測(cè)試手段分析不同溫度下煅燒所得粉體的物相、形貌與發(fā)光性質(zhì)。XRD和SEM結(jié)果表明：(Y,Gd)Al3(BO3)4:Tb3+的最低合成溫度為1000 ℃，在該反應(yīng)過程中，首先形成中間相Al4B2O9、YBO3和Y3Al5O12，而最終形成單相的(Y,Gd)Al3(BO3)4:Tb3+。隨煅燒溫度的升高，樣品結(jié)晶程度越來越好，并且顆粒尺寸隨溫度的升高而增大，在1100 ℃時(shí)合成的晶粒尺寸比較均勻，平均粒徑在1 μm左右。發(fā)光光譜的測(cè)試結(jié)果表明：在229 nm激發(fā)下，(Y,Gd)Al3(BO3)4: Tb3+熒光粉最強(qiáng)發(fā)射峰位于542 nm處，屬于Tb3+的5D4→7F5的躍遷。在該體系中存在Gd3+→Tb3+的能量傳遞，使得該熒光粉的發(fā)光強(qiáng)度隨著Gd3+摻雜濃度的增加而增大

    Abstract:

    (Y,Gd)Al3(BO3)4:Tb3+ phosphors were synthesized by a gel combustion method. The phase composition, morphology and luminescent properties of the powders derived from the sintered precursor at different temperatures were analyzed by X–ray diffraction (XRD), scanning electron microscope (SEM) and photoluminescent measurement (PL). The results show that the purified (Y,Gd)Al3(BO3)4:Tb3+ crystalline phase could be obtained at 1000 ℃. The intermediate phases: Yttrium borate (YBO3) , aluminum borate (Al4B2O9) and yttrium aluminum garnet, are generated firstly, then the finally single-phase YAB:Eu3+ is produced. The powder as-prepared at 1100 ℃ consists of relatively homogeneous particles with the average diameter of 1 μm. The luminescent properties of (Y, Gd)Al3(BO3)4:Tb3+ are presented. In the emission spectrum of (Y, Gd)Al3(BO3)4:Tb3+ excited by 229 nm, the main peak is located at about 542 nm due to the transition of 5D0→7F2 of Tb3+ emission. The PL intensity of Tb3+ in Y0.9-xGdxAl3Tb0.1(BO3)4 increases with the increase of x values due to an energy migration process like Gd3+→Tb3+ occurred in the phosphors

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李桂芳,曹全喜,黃云霞,李志敏,衛(wèi)云鴿.凝膠-燃燒法合成(Y, Gd)Al3(BO3)4:Tb3+熒光材料的結(jié)構(gòu)及其發(fā)光性能[J].稀有金屬材料與工程,2009,38(9):1638~1641.[Li Guifang, Cao Quanxi, Huang Yunxia, Li Zhimin, Wei Yunge. Structure and Luminescence Properties of (Y, Gd)Al3(BO3)4:Tb3+ Phosphors by Gel Combustion Synthesis[J]. Rare Metal Materials and Engineering,2009,38(9):1638~1641.]
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  • 收稿日期:2008-09-22
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