Yttria-stabilized zirconia (ZrO2:Y3+) single crystals (with 9.5mol% Y2O3) were irradiated with x-rays and α particles. Thermally stimulated luminescence (TSL) data show a main broad peak centred at ∼500-550 K in the glow curves of all irradiated samples. The TSL peak maximum temperature is consistent with the characteristic recovery temperature (∼450K) of colour centres (T centres) deduced from isochronal annealing curves measured by electron paramagnetic resonance (EPR) spectroscopy. However, the trap-depth energies (ranging between 0.8 and 1.2eV) deduced from the initial rise of partially cleaned TSL peaks (and from a rough approximation using Urbachs formula) are much larger than the activation energies for defect recovery of 0.3eV deduced from the EPR data. A second TSL peak centred at ∼350-450 K found in freshly irradiated samples is seen to decay substantially in aged samples. The processes involved in TSL are discussed in relation to the defect annealing processes, and available defect-level energy and TSL data. © 2011 IOP Publishing Ltd.

Costantini, J., Beuneu, F., Fasoli, M., Galli, A., Vedda, A., Martini, M. (2011). Thermo-stimulated luminescence of x-ray- and alpha-irradiated yttria-stabilized zirconia. JOURNAL OF PHYSICS. CONDENSED MATTER, 23(45) [10.1088/0953-8984/23/45/455901].

Thermo-stimulated luminescence of x-ray- and alpha-irradiated yttria-stabilized zirconia

FASOLI, MAURO;GALLI, ANNA;VEDDA, ANNA GRAZIELLA;MARTINI, MARCO
2011

Abstract

Yttria-stabilized zirconia (ZrO2:Y3+) single crystals (with 9.5mol% Y2O3) were irradiated with x-rays and α particles. Thermally stimulated luminescence (TSL) data show a main broad peak centred at ∼500-550 K in the glow curves of all irradiated samples. The TSL peak maximum temperature is consistent with the characteristic recovery temperature (∼450K) of colour centres (T centres) deduced from isochronal annealing curves measured by electron paramagnetic resonance (EPR) spectroscopy. However, the trap-depth energies (ranging between 0.8 and 1.2eV) deduced from the initial rise of partially cleaned TSL peaks (and from a rough approximation using Urbachs formula) are much larger than the activation energies for defect recovery of 0.3eV deduced from the EPR data. A second TSL peak centred at ∼350-450 K found in freshly irradiated samples is seen to decay substantially in aged samples. The processes involved in TSL are discussed in relation to the defect annealing processes, and available defect-level energy and TSL data. © 2011 IOP Publishing Ltd.
Articolo in rivista - Articolo scientifico
zirconia; defects; thermoluminescence; electron paramagnetic resonance
English
2011
23
45
455901
none
Costantini, J., Beuneu, F., Fasoli, M., Galli, A., Vedda, A., Martini, M. (2011). Thermo-stimulated luminescence of x-ray- and alpha-irradiated yttria-stabilized zirconia. JOURNAL OF PHYSICS. CONDENSED MATTER, 23(45) [10.1088/0953-8984/23/45/455901].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/27140
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