Effect of titanium ion implantation and the gas atmosphere on the electrophysical properties of alumina

Abstract

The energy and kinetic characteristics of the dark conductivity and photoconductivity of polycrystalline alumina irradiated by titanium ions and then annealed in vacuum and air have been studied. The effect of temperature on the properties and electron-transport mechanisms is determined. In the air pressure range from 10⁵ to 1 Pa, the electrophysical properties are reversible. A semiconductor coating can be formed on the alumina surface via vacuum annealing; when heated in air, it becomes insulating. The reverse transition is also possible. These modifications are related to the formation of defects, accumulation of oxygen-containing complexes, and changes in the stoichiometric compositions of the compounds synthesized by the ion thermal treatment.

Original language	English
Pages (from-to)	734-738
Number of pages	5
Journal	Technical Physics
Volume	52
Issue number	6
DOIs	https://doi.org/10.1134/S1063784207060096
Publication status	Published - 1 Jun 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Kabyshev, A. V., & Konusov, F. V. (2007). Effect of titanium ion implantation and the gas atmosphere on the electrophysical properties of alumina. Technical Physics, 52(6), 734-738. https://doi.org/10.1134/S1063784207060096

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AB - The energy and kinetic characteristics of the dark conductivity and photoconductivity of polycrystalline alumina irradiated by titanium ions and then annealed in vacuum and air have been studied. The effect of temperature on the properties and electron-transport mechanisms is determined. In the air pressure range from 105 to 1 Pa, the electrophysical properties are reversible. A semiconductor coating can be formed on the alumina surface via vacuum annealing; when heated in air, it becomes insulating. The reverse transition is also possible. These modifications are related to the formation of defects, accumulation of oxygen-containing complexes, and changes in the stoichiometric compositions of the compounds synthesized by the ion thermal treatment.

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