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熱處理溫度及EDTA對β-NaYF4:Yb3+,Er3+材料結構與性能的影響()

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中國材料進展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期數:: 2014年第2期

頁碼:: 120-124

欄目:

出版日期:: 2014-02-28

文章信息/Info

Title:: The Effect of Heat Treatment Temperature and EDTA on Structure and Performance of β-NaYF4: Yb3+, Er3+

文章編號:: 1674-3962(2014)02-0120-05

作者:: 袁新生; 顧士甲; 王連軍; 江莞; 東華大學纖維改性國家重點實驗室，上海 201620

Author(s):: YUAN Xinsheng; GU Shijia; WANG Lianjun; JIANG Wan; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,
Donghua University, Shanghai 201620, China

關鍵詞:: ; NaYF4: Yb3+; Er3+; 熱處理; 螯合劑; 上轉換發光

分類號:: TB34\TQ124.3

DOI:: 10.7502/j.issn.1674-3962.2014.02.08

文獻標志碼:: A

摘要:: 采用共沉淀法合成了Yb3+、Er3+共摻雜的NaYF4粉體，重點研究了熱處理溫度和螯合劑EDTA對所合成粉體的晶相、表面形貌以及上轉換發光性能的影響，并利用X射線衍射、掃描電鏡及熒光光譜對其結構組成、晶體表面形貌及發光性能進行了研究。結果表明：隨著熱處理溫度的升高，NaYF4:Yb3+,Er3+粉體由立方相向六方相轉變，當溫度高于600 ℃時又從六方相逐漸轉變為立方相，而且顆粒的尺寸逐漸變大，從近似球形到無規則形狀；NaYF4:Yb3+,Er3+發光強度與熱處理溫度密切相關，熱處理溫度對于β-NaYF4:Yb3+,Er3+的發光性能有著重要的影響。經過600 ℃熱處理后的粉體具有較高的發光強度；螯合劑EDTA的添加對所合成粉體的發光性能有著明顯的影響，螯合劑的添加降低了其發光強度；在1 000 ℃以內，NaYF4:Yb3+,Er3+具有良好的熱穩定性。

Abstract:: Ytterbium (Yb3+) and erbium (Er3+) ions codoped sodium yttrium fluoride was prepared by precipitation method in the presence of EDTA as a chelating agent. The research is mainly focused on the effect of EDTA and calcination temperature on the powder crystal phase, surface morphology and the luminous performance. The phase composition, microstructure and property of luminescence are characterized by XRD, SEM and fluorescence spectrophotometer. The experimental results showed that with the increase of heat treatment, phase transition from cubic to hexagonal of NaYF4:Yb3+, Er3+ powder occurred. When the temperature reached higher than 600 ℃, the hexagonal phase gradually transformed to cubic phase, and the size of the particles increased gradually, from approximately spherical to random shape; The luminous intensity of NaYF4: Yb3+, Er3+ is closely related to heat treatment temperature, which has an important effect on the luminous properties. NaYF4:Yb3+,Er3+ heated at 600 ℃ shows the relative strongest upconversion(UC) luminous intensity; The powder synthesized with EDTA shows evident effect on the intensity of UC emission, and makes UC luminous intensity weaker; NaYF4:Yb3+,Er3+ has a good thermal stability below 1 000 ℃.

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更新日期/Last Update: 2014-02-26