• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Size dependent optical temperature sensing properties of Y2O3: Tb3+, Eu3+ nanophosphors
【24h】

Size dependent optical temperature sensing properties of Y2O3: Tb3+, Eu3+ nanophosphors

机译：Y2O3：Tb3 +，Eu3 +纳米磷光体的尺寸依赖性光学温度传感特性

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Using urea as a precipitation agent, Tb ~(3+) , Eu ~(3+) co-doped Y _(2) O _(3) nanophosphors were synthesized by a homogeneous precipitation method. The sizes of the sample particles were controlled by changing the molar ratio of the urea and rare earth ions. The microstructure and crystallographic structure of the sample were determined through powder X-ray diffraction (PXRD) and field emission scanning electron microscopy (FE-SEM). The test results show that the sample is body centered cubic. As the molar ratio of urea to rare earth ions increases, the size of the sample particles decreases. The temperature-dependent emission spectra of Tb ~(3+) , Eu ~(3+) co-doped Y _(2) O _(3) phosphors with different particle sizes were measured. The results showed that because the fluorescence intensity ratio (FIR) of Tb ~(3+) and Eu ~(3+) varies with temperature, it can be used to visually reflect changes in temperature. In addition, the temperature sensing sensitivity of Tb ~(3+) and Eu ~(3+) co-doped Y _(2) O _(3) phosphors increased upon a decrease in the particle size, but the relative sensitivity decreased with a decrease in the particle size. The physical mechanism of the sensitivity and relative sensitivity changes with the size of the sample particles was also explained.
机译：以尿素为沉淀剂，通过均相沉淀法合成了Tb〜（3+），Eu〜（3+）共掺杂的Y _（2）O _（3）纳米磷光体。通过改变尿素和稀土离子的摩尔比来控制样品颗粒的尺寸。通过粉末X射线衍射（PXRD）和场发射扫描电子显微镜（FE-SEM）确定样品的显微结构和晶体结构。测试结果表明，样品为体心立方。随着尿素与稀土离子的摩尔比增加，样品颗粒的尺寸减小。测量了不同粒径的Tb〜（3+），Eu〜（3+）共掺杂Y _（2）O _（3）荧光粉的温度依赖性发射光谱。结果表明，由于Tb〜（3+）和Eu〜（3+）的荧光强度比（FIR）随温度变化，因此可以用来直观地反映温度的变化。此外，随着粒径的减小，Tb〜（3+）和Eu〜（3+）共掺杂的Y _（2）O _（3）荧光粉的温度感测灵敏度增加，但相对灵敏度随粒径减小。还解释了灵敏度和相对灵敏度随样品颗粒尺寸变化的物理机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号