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材料研究学报  2007, Vol. 21 Issue (6): 637-642    
  论文 本期目录 | 过刊浏览 |
EYTO粉末的光致发光特性
沙明杰;朱振华;苏显云;雷明凯
大连理工大学化工学院化学系 大连116024大连理工大学材料科学与工程学院表面工程研究室大连116024(沙明杰);大连理工大学材料科学与工程学院表面工程研究室 大连116024(朱振华);大连理工大学化工学院化学系 大连116024(苏显云;雷明凯)
引用本文:

沙明杰;朱振华;苏显云;雷明凯. EYTO粉末的光致发光特性[J]. 材料研究学报, 2007, 21(6): 637-642.

全文: PDF(931 KB)  
摘要: 以柠檬酸为络合剂、钛酸丁酯为前驱体,制备了Er~(3+)掺杂浓度(摩尔分数)为0.1%-5.0%的(Er,Y)_2Ti_2O_7 (EYTO)粉末.在700℃烧结EYTO粉末中EYTO相的晶化不完全,随着烧结温度的升高晶化程度显著提高,-OH基团的含量逐渐减少;在1000℃烧结,得到结晶完全且不含-OH基团的EYTO相.不完全晶化的EYTO相的PL谱为半高宽112 nm的单一宽峰,结晶完全的EYTO相其PL谱为发生Stark分裂的分立发光峰.随着烧结温度的升高EYTO粉末的PL强度和荧光寿命连续提高,归因于粉末中-OH基团的逐步脱除和EYTO相晶化程度的提高;Er~(3+)浓度在0.1%-1.5%区间均呈现上升趋势,源于EYTO相为Er~(3+)提供了均匀分散;Er~(3+)浓度为1.5%时均达到最大值、荧光寿命为20.9 ms.当Er~(3+)浓度超过1.5%时,Er~(3+)-Er~(3+)间的交互作用增强导致1.53μm的PL强度和荧光寿命持续下降.
关键词 无机非金属材料(ErY)_2Ti_2O_7    
Key words
收稿日期: 1900-01-01     
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