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A LUMINESCENCE STUDY OF PLASMA TREATED ALUMINA POWDERS

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MORÁVEK Tomáš RÁHEĽ Jozef

Rok publikování 2015
Druh Konferenční abstrakty
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Popis The sintering of plasma pre-treated alumina sub-micron powders results in finer microstructure of final ceramics. This highly interesting and potentially useful result motivates us to study the microscopic changes on plasma treated alumina powders. In this paper we present the study of luminescence produced by thermally stimulated plasma treated alumina powders, to extend the portfolio of standard surface diagnostic tools specializing primarily at chemical and topological changes. We found that luminescence signal is exceedingly sensitive to plasma treatment. The comprehensive set of experiments implies that the emitted light is produced chiefly by the process of thermoluminescence. Hence the emitted light is the direct consequence of plasma assisted electron trapping in the material, rather than the outcome of chemical reactions.
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