Eu ~ (3) doped with rare earth ion probe characteristics oxyfluoride glass fluorescence

Title: Eu ~ (3) doped with rare earth ion probe characteristics oxyfluoride glass fluorescence characteristics of
　　Author: Xu Wei
　　Degree-granting units: Liaoning Normal University
　　Keywords: Eu ~ (3) ion;; probe;; borosilicate glass;; oxyfluoride glass;; temperature sensor
　　Summary:
　　In this paper, were prepared by high Neodymium magnets temperature solid single-doped Eu ~ (3), Bi ~ (3) / Eu ~ (3), Yb ~ (3) / Eu ~ (3) co-doped boron
　　Silicate glass and Yb ~ (3) / Er ~ (3) co-doped oxyfluoride glass samples. Discussed the Bi ~ (3) and Eu ~ (3) energy transfer between
　　Process, according to the Eu ~ (3) ion emission spectrum and Judd-Ofelt theory of the Bi ~ (3) ion incorporation of Eu ~ (3) ions around the micro-
　　View of the environment, and based on Miyakava-Dexter theory and Eu ~ (3) of the phonon side band spectrum analysis of the Bi ~ (3) ions on the Eu ~ (3) from
　　Child without the impact of radiative transition probability. The results show that, in the borosilicate glass in Bi ~ (3) ions on the Eu ~ (3) ions into a better sensitivity
　　Used, with the Bi ~ (3) ion doped, Eu ~ (3) ion-covalent nature of the surrounding enhanced symmetry reduction, enhanced Eu ~ (3) ions in galvanic
　　Pole transition strength, and Bi ~ (3) ion concentration in a certain range of added Eu ~ (3) ion-free radiative transition probability, so that Eu ~ (3) from
　　Son of fluorescence intensity decreased.
　　Secondly, according to Eu ~ (3) ions in borosilicate glass crystal field splitting of the energy levels and fluorescence
　　Spectra of the Yb ~ (3) ion incorporation on the Eu ~ (3) ions in which the impact of Double column, and define the Eu ~ (3) ion ~ 5D_0-~ 7F_2 electrical
　　Dipole transition intensity ~ 5D_0-~ 7F_1 strength of the magnetic dipole transition ratio for the parameter R to characterize the Yb ~ (3) ion incorporation of Eu ~ (3) ion
　　Local environment in which to explore the Yb ~ (3) ions and Eu ~ (3) effects of energy transfer between ions. The results showed that incorporation of Yb ~
　　(3) ion would Eu ~ (3) ions around the ion enhancements, increased symmetry, and Yb ~ (3) ion incorporation will "induce" Eu ~
　　(3) ion transitions involving virtual levels.
　　Concludes with a discussion of the annealing process on the Yb ~ (3) / Er ~ (3) co-doped oxyfluoride glass on
　　Conversion luminescence characteristics, measurement of the pump light source in different power and different working temperatures of up-conversion fluorescence spectroscopy, analysis of the Yb ~
　　(3) ions and Er ~ (3) energy transfer between ions to study the temperature characteristics of the sample before and after annealing to explore the system in the temperature of the material
　　Temperature sensor in the application. The results show that after annealing the sample up-conversion fluorescence intensity increased significantly; before and after annealing, Yb ~
　　(3) / Er ~ (3) co-doped oxyfluoride glass 523nm, 547nm, 667nm upconversion fluorescence at both two-photon process; after annealing at
　　Management of Yb ~ (3) / Er ~ (3) co-doped oxyfluoride glass maximum operating temperature of 823K, and still continue to improve the http://www.chinamagnets.biz/Neodymium/Ball-Neodymium-Magnets.php space, when the temperature is 373K
　　When the temperature reaches the maximum value of the sensor sensitivity is about 0.0047K ~ (-1). Not been annealed sample maximum operating temperature of
　　803K, at a temperature of 423K, the maximum value of sensitivity about 0.0045K ~ (-1). The series of samples of high-temperature sensor sensitivity
　　Value than in the past reported a much higher, indicating that in the preparation of high-temperature sensor has potential applications.
　　Degree Year: 2010