title
  

Effect of sintering and boron content on rare earth dopant distribution in long afterglow strontium aluminate

Khabbazabkenar, Sirous and Kocjan, Andraž and Samardžija, Zoran and Fanetti, Mattia and Ergene, Arzu and Šturm, Sašo and Sezen, Meltem and Ow-Yang, Cleva W. Effect of sintering and boron content on rare earth dopant distribution in long afterglow strontium aluminate. Journal of the European Ceramic Society . ISSN 0955-2219 (Print) 1873-619X (Online) Published Online First http://dx.doi.org/10.1016/j.jeurceramsoc.2020.04.048

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2020.04.048

Abstract

B has been proposed to extend persistent luminescence from minutes to > 10 h in Eu, Dy, and B co-doped Sr4Al14O25 (S4A7EDB) by facilitating the incorporation of Eu2+ and Dy3+ into adjacent Sr sub-lattice sites and enabling energy transfer between them. To evaluate additional influences of B on the kinetics of microstructural evolution and dopant distribution that support afterglow in S4A7EDB, the effect of heating rates to 1300 °C is compared for spark-plasma sintering and conventional sintering, with and without the addition of B2O3. Analysis of the microstructure and elemental distribution, by a combination of imaging, WDS, and CL in the SEM, XRD, dilatometry, and STEM-EELS, reveals that when the diffusivity of Eu and Dy is increased, Eu and Dy segregate to the intergranular phase. The partitioning of Eu and Dy concentrations to below their solubility limit in the grains appears to be essential to material structure enabling longer afterglow.

Item Type:Article
Uncontrolled Keywords:Persistent luminescence; Spark-plasma sintering; Strontium aluminate; Dopant segregation; Cathodoluminescence
Subjects:UNSPECIFIED
ID Code:39859
Deposited By:Sirous Khabbazabkenar
Deposited On:29 Apr 2020 12:29
Last Modified:16 Sep 2020 12:33

Repository Staff Only: item control page