Kinetics of F center annealing and colloid formation in Al2O3

E. A. Kotomin; V. N. Kuzovkov; A. I. Popov; R. Vila

doi:10.1016/j.nimb.2015.08.055

Kinetics of F center annealing and colloid formation in Al₂O₃

E. A. Kotomin^*
, V. N. Kuzovkov
, A. I. Popov
, R. Vila

^*Šī darba korespondējošais autors

Pašorganizēto sistēmu kinētikas laboratorija, Cietvielu fizikas institūts

CIEMAT

Zinātniskās darbības rezultāts: Devums žurnālam › Zinātniskais raksts (žurnālā) › koleģiāli recenzēts

57 Atsauces (Scopus)

Kopsavilkums

The diffusion-controlled kinetics of the F center annealing in Al₂O₃ (sapphire, corundum) is simulated theoretically for the two regimes: after neutron irradiation when the immobile F centers are annihilated with complementary defects - mobile interstitial oxygen ions, and in thermochemically reduced (additively colored) crystals where mobile F centers aggregate and create the metal colloids. A comparison of the experimental and theoretical kinetics allowed us to estimate the migration energies for the F centers and interstitial oxygen ions. It is obtained that the pre-exponents in diffusion coefficients for defects in different neutron irradiated samples can vary by two orders of magnitude which is attributed by presence of numerous traps for mobile interstitial oxygen ions.

Oriģinālvaloda	Angļu
Lapas (no-līdz)	107-110
Lapu skaits	4
Žurnāls	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Sējums	374
DOIs	https://doi.org/10.1016/j.nimb.2015.08.055
Publikācijas statuss	Publicēts - 1 maijs 2016

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title = "Kinetics of F center annealing and colloid formation in Al2O3",

abstract = "The diffusion-controlled kinetics of the F center annealing in Al2O3 (sapphire, corundum) is simulated theoretically for the two regimes: after neutron irradiation when the immobile F centers are annihilated with complementary defects - mobile interstitial oxygen ions, and in thermochemically reduced (additively colored) crystals where mobile F centers aggregate and create the metal colloids. A comparison of the experimental and theoretical kinetics allowed us to estimate the migration energies for the F centers and interstitial oxygen ions. It is obtained that the pre-exponents in diffusion coefficients for defects in different neutron irradiated samples can vary by two orders of magnitude which is attributed by presence of numerous traps for mobile interstitial oxygen ions.",

keywords = "Annealing, F centers, Metal colloids, Sapphire (AlO), Thermochemical reduction",

author = "Kotomin, \{E. A.\} and Kuzovkov, \{V. N.\} and Popov, \{A. I.\} and R. Vila",

year = "2016",

month = may,

day = "1",

doi = "10.1016/j.nimb.2015.08.055",

language = "English",

volume = "374",

pages = "107--110",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier B.V.",

}

Kinetics of F center annealing and colloid formation in Al₂O₃. / Kotomin, E. A.; Kuzovkov, V. N.; Popov, A. I. u.c.
(gadā): Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Sēj. 374, 01.05.2016, lpp. 107-110.

Zinātniskās darbības rezultāts: Devums žurnālam › Zinātniskais raksts (žurnālā) › koleģiāli recenzēts

TY - JOUR

T1 - Kinetics of F center annealing and colloid formation in Al2O3

AU - Kotomin, E. A.

AU - Kuzovkov, V. N.

AU - Popov, A. I.

AU - Vila, R.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - The diffusion-controlled kinetics of the F center annealing in Al2O3 (sapphire, corundum) is simulated theoretically for the two regimes: after neutron irradiation when the immobile F centers are annihilated with complementary defects - mobile interstitial oxygen ions, and in thermochemically reduced (additively colored) crystals where mobile F centers aggregate and create the metal colloids. A comparison of the experimental and theoretical kinetics allowed us to estimate the migration energies for the F centers and interstitial oxygen ions. It is obtained that the pre-exponents in diffusion coefficients for defects in different neutron irradiated samples can vary by two orders of magnitude which is attributed by presence of numerous traps for mobile interstitial oxygen ions.

AB - The diffusion-controlled kinetics of the F center annealing in Al2O3 (sapphire, corundum) is simulated theoretically for the two regimes: after neutron irradiation when the immobile F centers are annihilated with complementary defects - mobile interstitial oxygen ions, and in thermochemically reduced (additively colored) crystals where mobile F centers aggregate and create the metal colloids. A comparison of the experimental and theoretical kinetics allowed us to estimate the migration energies for the F centers and interstitial oxygen ions. It is obtained that the pre-exponents in diffusion coefficients for defects in different neutron irradiated samples can vary by two orders of magnitude which is attributed by presence of numerous traps for mobile interstitial oxygen ions.

KW - Annealing

KW - F centers

KW - Metal colloids

KW - Sapphire (AlO)

KW - Thermochemical reduction

UR - https://www.scopus.com/pages/publications/84940933304

U2 - 10.1016/j.nimb.2015.08.055

DO - 10.1016/j.nimb.2015.08.055

M3 - Article

AN - SCOPUS:84940933304

SN - 0168-583X

VL - 374

SP - 107

EP - 110

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

ER -