Luminescence Quenching in Magnesium-Doped Alumina Ceramics

Journal Article · Wed May 15 04:00:00 EDT 2019 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783419050408· OSTI ID:22925274

Smirnov, N. O. ^[1]

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1. Ural Federal University Named after the First President of Russia B.N. Yeltsin (Russian Federation)

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 (Mn{sup 4+} and Cr{sup 3+}) in the photoluminescence emission bands at 673 and 689 nm, and all the recorded thermoluminescence peaks at 380, 450, and 615 K.

• OSTI ID: 22925274
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 5 Vol. 61; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM OXIDES
CATHODOLUMINESCENCE
CERAMICS
CHROMIUM IONS
CONCENTRATION RATIO
DEFECTS
DOPED MATERIALS
F CENTERS
IMPURITIES
MAGNESIUM
MANGANESE IONS
PHOTOLUMINESCENCE
PULSES
QUENCHING
SPECTRA
SYNTHESIS
TEMPERATURE RANGE 0400-1000 K
THERMOLUMINESCENCE