Detail publikace
Processing and properties of luminescent Cr3+ doped transparent alumina ceramics
DRDLÍKOVÁ, K. KLEMENT, R. DRDLÍK, D. GALUSEK, D. MACA, K.
Originální název
Processing and properties of luminescent Cr3+ doped transparent alumina ceramics
Anglický název
Processing and properties of luminescent Cr3+ doped transparent alumina ceramics
Jazyk
en
Originální abstrakt
Transparent Cr2O3-doped alumina ceramics were prepared by slip casting, followed by pre-sintering in ambient atmosphere and hot isostatic pressing. The effect of dopant concentration on material properties, including microstructure and optical properties was evaluated. Real in-line transmittance in the range of 20–44 % was measured for the ceramics with the mean grain size<520 nm: the transmittance decreased with increasing grain size and Cr content. The excitation spectra consisted of two broad bands with maxima at 404 nm and 558 nm, corresponding to 4A2g→4T1g and 4A2g→4T2g transitions of Cr3+ ions in octahedral sites of α-Al2O3. The intensive deep red narrow emissions under violet/green light excitation, R-lines (2Eg→4A2g transition), were observed at 692.5 nm and 693.8 nm, that are very close to ruby single crystal. The highest emission was achieved at the Cr3+ concentration of 0.4 at.%. The luminescence decay curves exhibited single-exponential behaviour with decay times of ∼3.6 ms.
Anglický abstrakt
Transparent Cr2O3-doped alumina ceramics were prepared by slip casting, followed by pre-sintering in ambient atmosphere and hot isostatic pressing. The effect of dopant concentration on material properties, including microstructure and optical properties was evaluated. Real in-line transmittance in the range of 20–44 % was measured for the ceramics with the mean grain size<520 nm: the transmittance decreased with increasing grain size and Cr content. The excitation spectra consisted of two broad bands with maxima at 404 nm and 558 nm, corresponding to 4A2g→4T1g and 4A2g→4T2g transitions of Cr3+ ions in octahedral sites of α-Al2O3. The intensive deep red narrow emissions under violet/green light excitation, R-lines (2Eg→4A2g transition), were observed at 692.5 nm and 693.8 nm, that are very close to ruby single crystal. The highest emission was achieved at the Cr3+ concentration of 0.4 at.%. The luminescence decay curves exhibited single-exponential behaviour with decay times of ∼3.6 ms.
Plný text v Digitální knihovně
Dokumenty
BibTex
@article{BUT163593,
author="Katarina {Drdlíková} and Róbert {Klement} and Daniel {Drdlík} and Dušan {Galusek} and Karel {Maca}",
title="Processing and properties of luminescent Cr3+ doped transparent alumina ceramics",
annote="Transparent Cr2O3-doped alumina ceramics were prepared by slip casting, followed by pre-sintering in ambient atmosphere and hot isostatic pressing. The effect of dopant concentration on material properties, including microstructure and optical properties was evaluated. Real in-line transmittance in the range of 20–44 % was measured for the ceramics with the mean grain size<520 nm: the transmittance decreased with increasing grain size and Cr content. The excitation spectra consisted of two broad bands with maxima at 404 nm and 558 nm, corresponding to 4A2g→4T1g and 4A2g→4T2g transitions of Cr3+ ions in octahedral sites of α-Al2O3. The intensive deep red narrow emissions under violet/green light excitation, R-lines (2Eg→4A2g transition), were observed at 692.5 nm and 693.8 nm, that are very close to ruby single crystal. The highest emission was achieved at the Cr3+ concentration of 0.4 at.%. The luminescence decay curves exhibited single-exponential behaviour with decay times of ∼3.6 ms.",
address="Elsevier",
chapter="163593",
doi="10.1016/j.jeurceramsoc.2019.11.010",
howpublished="online",
institution="Elsevier",
number="7",
volume="40",
year="2020",
month="july",
pages="2573--2580",
publisher="Elsevier",
type="journal article in Web of Science"
}