Premium
Multifunctional optical thermometry based on the stark sublevels of Er 3+ in CaO‐Y 2 O 3 : Yb 3+ /Er 3 +
Author(s) -
Xiang Guotao,
Liu Xiaotong,
Liu Wen,
Wang Bin,
Liu Zhen,
Jiang Sha,
Zhou Xianju,
Li Li,
Jin Ye,
Zhang Jiahua
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16939
Subject(s) - analytical chemistry (journal) , excitation , laser , materials science , ion , titanium , atomic physics , stark effect , ytterbium , crucible (geodemography) , wavelength , chemistry , optoelectronics , optics , physics , electric field , metallurgy , organic chemistry , chromatography , quantum mechanics , computational chemistry
A conventional high temperature solid state method was utilized to prepare CaO‐Y 2 O 3 , which is a potential candidate for manufacturing crucible material to melt titanium and titanium alloys with low cost. Meanwhile, Yb 3+ ions and Er 3+ ions were selected as the sensitizers and activators respectively to dope into CaO‐Y 2 O 3 , aimed at providing real‐time optical thermometry during the preparation process of titanium alloys realized using fluorescence intensity ratio (FIR) technology. The results reveal that a high measurement precision can be acquired by using the Stark sublevels of Er 3+ 4 F 9/2 to measure the temperature with a maximum absolute error of only about 3 K. In addition, by analyzing the dependence of 4 I 13/2 → 4 I 15/2 transition on pump power of 980 nm excitation wavelength, it was found that the laser‐induced thermal effect has almost no influence on the temperature measurement conducted by using the FIR of the Stark sublevels of Er 3+ 4 I 13/2 , which means that a high excitation pump power can be used to obtain strong NIR emission and good signal‐to‐noise ratio for optical thermometry without the influence of the laser‐induced thermal effect. All the results reveal that CaO‐Y 2 O 3 : Yb 3+ /Er 3+ is an excellent temperature sensing material with high measurement precision.