Abstract
The spectral and luminescence decay kinetics of magnesium aluminate spinel ceramics prepared by spark plasma sintering (SPS) and the starting nanopowders were studied. It was demonstrated that two types of luminescence in spinel ceramics can be observed after pulse e-beam excitation. The first type is due to intrinsic defects, and the second type due to Cr3+ and Mn2+ ions. It was shown that the luminescence decay kinetics for Cr3+ and Mn2+ impurity ions can be approximated by the sum of two exponents. The decay times for the Cr3+ ion are 35 and 409 ns, for the Mn2+ ion are 29 and 340 ns. High-temperature exposure during SPS synthesis does not lead to a change in the nearest surroundings of impurity ions. In the luminescence spectra of ceramic and powder samples the intensity ratio changes of intrinsic and impurity centers is associated with strong diffuse scattering of light for spinel nanopowders.
| Original language | English |
|---|---|
| Pages (from-to) | 416-421 |
| Number of pages | 6 |
| Journal | Journal of Applied Spectroscopy |
| Volume | 85 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jul 2018 |
Fingerprint
Keywords
- Cr ions
- decay time
- Mn ions
- nanoceramic
- pulse cathodoluminescence
- spark plasma sintering technique
- spinel MgAlO
ASJC Scopus subject areas
- Condensed Matter Physics
- Spectroscopy
Cite this
Pulse Cathodoluminescence of the Impurity Centers in Ceramics Based on the MgAl2O4 Spinel. / Polisadova, F.; Vaganov, V.; Stepanov, S. A.; Paygin, V. D.; Khasanov, L.; Dvilis, E. S.; Valiev, D.; Kalinin, R. G.
In: Journal of Applied Spectroscopy, Vol. 85, No. 3, 01.07.2018, p. 416-421.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pulse Cathodoluminescence of the Impurity Centers in Ceramics Based on the MgAl2O4 Spinel
AU - Polisadova, F.
AU - Vaganov, V.
AU - Stepanov, S. A.
AU - Paygin, V. D.
AU - Khasanov, L.
AU - Dvilis, E. S.
AU - Valiev, D.
AU - Kalinin, R. G.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - The spectral and luminescence decay kinetics of magnesium aluminate spinel ceramics prepared by spark plasma sintering (SPS) and the starting nanopowders were studied. It was demonstrated that two types of luminescence in spinel ceramics can be observed after pulse e-beam excitation. The first type is due to intrinsic defects, and the second type due to Cr3+ and Mn2+ ions. It was shown that the luminescence decay kinetics for Cr3+ and Mn2+ impurity ions can be approximated by the sum of two exponents. The decay times for the Cr3+ ion are 35 and 409 ns, for the Mn2+ ion are 29 and 340 ns. High-temperature exposure during SPS synthesis does not lead to a change in the nearest surroundings of impurity ions. In the luminescence spectra of ceramic and powder samples the intensity ratio changes of intrinsic and impurity centers is associated with strong diffuse scattering of light for spinel nanopowders.
AB - The spectral and luminescence decay kinetics of magnesium aluminate spinel ceramics prepared by spark plasma sintering (SPS) and the starting nanopowders were studied. It was demonstrated that two types of luminescence in spinel ceramics can be observed after pulse e-beam excitation. The first type is due to intrinsic defects, and the second type due to Cr3+ and Mn2+ ions. It was shown that the luminescence decay kinetics for Cr3+ and Mn2+ impurity ions can be approximated by the sum of two exponents. The decay times for the Cr3+ ion are 35 and 409 ns, for the Mn2+ ion are 29 and 340 ns. High-temperature exposure during SPS synthesis does not lead to a change in the nearest surroundings of impurity ions. In the luminescence spectra of ceramic and powder samples the intensity ratio changes of intrinsic and impurity centers is associated with strong diffuse scattering of light for spinel nanopowders.
KW - Cr ions
KW - decay time
KW - Mn ions
KW - nanoceramic
KW - pulse cathodoluminescence
KW - spark plasma sintering technique
KW - spinel MgAlO
UR - http://www.scopus.com/inward/record.url?scp=85051090318&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85051090318&partnerID=8YFLogxK
U2 - 10.1007/s10812-018-0666-9
DO - 10.1007/s10812-018-0666-9
M3 - Article
AN - SCOPUS:85051090318
VL - 85
SP - 416
EP - 421
JO - Journal of Applied Spectroscopy
JF - Journal of Applied Spectroscopy
SN - 0021-9037
IS - 3
ER -