Luminescence Quenching in Magnesium-Doped Alumina Ceramics


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

The effect of magnesium impurity on luminescent properties of alumina ceramics sintered at high temperatures under vacuum is studied by pulsed cathodoluminescence, photoluminescence, and thermoluminescence. At dopant concentrations >1 wt %, high-temperature synthesis results in formation of defects associated with magnesium, which were identified in the pulsed cathodoluminescence (520 nm) and photoluminescence (767 nm) spectra, as well as in the thermoluminescence curves (380 K). It is found that increased magnesium concentration leads to luminescence quenching of the intrinsic centers (F centers) of alumina in the PCL emission band at 400 nm, impurity defects (Mn4+ and Cr3+) in the photoluminescence emission bands at 673 and 689 nm, and all the recorded thermoluminescence peaks at 380, 450, and 615 K.

About the authors

S. V. Zvonarev

Ural Federal University Named after the First President of Russia B.N. Yeltsin

Author for correspondence.
Email: s.v.zvonarev@urfu.ru
Russian Federation, Yekaterinburg

N. O. Smirnov

Ural Federal University Named after the First President of Russia B.N. Yeltsin

Email: s.v.zvonarev@urfu.ru
Russian Federation, Yekaterinburg

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2019 Pleiades Publishing, Ltd.