Point Defects in Magnesium Aluminates Spinel Ceramics Doped with Lithium Fluoride

• Authors: V. Gritsyna , Yu. Kazarinov , A. Moskvitin , I. Reimanis
• Languages of publication: EN

Abstracts

EN

The nature and topological distribution of optical centers within various regions of hot pressed disks of transparent magnesium aluminates spinel ceramics doped with LiF were studied. In the optical absorption spectra of this type of ceramic, bands were revealed at 4.75 eV and 5.3 eV, which were identified with F^{+}- and F-centers, respectively. Because both bands are formed by anionic vacancies which captured one or two electrons, the topological distribution of anionic vacancies was determined. The band at 5.65 eV was also found which is tentatively identified with complex centers of anionic vacancies that capture fluorine ions and electrons. Using X-ray irradiation the variety of absorption bands of hole centers related to cationic vacancies was established. The spatial distribution of cationic vacancies within the ceramic disk was also determined.

Keywords

EN

81.05.Je; 61.72.J-

Discipline

• 81.05.Je: Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)(for ceramics in electrochemistry, see 82.45.Yz)
• 61.72.J-: Point defects and defect clusters

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 1
• Pages: 161-165

Dates

published

2010-01

Contributors

author

V. Gritsyna

• Department of Physics and Technology, V.N. Karazin Kharkiv National University, Svoboda Sq. 4, 61077 Kharkiv, Ukraine

author

Yu. Kazarinov

• Department of Physics and Technology, V.N. Karazin Kharkiv National University, Svoboda Sq. 4, 61077 Kharkiv, Ukraine

author

A. Moskvitin

• Department of Physics and Technology, V.N. Karazin Kharkiv National University, Svoboda Sq. 4, 61077 Kharkiv, Ukraine

author

I. Reimanis

• Colorado Center for Advanced Ceramics, Metallurgical and Materials Engineering Department, Colorado School of Mines, Golden, CO 80401, USA

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Identifiers

DOI

10.12693/APhysPolA.117.161