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X-ray induced color change on dense yttria samples obtained by sparkplasma sintering

Attia, Mohammed A. A. and Garroni, Sebastiano and Chiriu, Daniele and Ricci, Carlo and Delogu, Francesco and Orrù, Roberto and Cao, Giacomo (2015) X-ray induced color change on dense yttria samples obtained by sparkplasma sintering. Chemical Physics Letters, Vol. 618 , p. 108-113. ISSN 0009-2614. eISSN 1873-4448. Article.

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DOI: 10.1016/j.cplett.2014.11.009


This work focuses on a particular behavior of dense yttria samples fabricated by spark plasma sintering,which display a reddish coloration when subjected to X-ray irradiation. The reddish coloration appearsexclusively in sintered material. Optical measurements, X-ray photoelectron spectroscopy and chem-ical methods have been used to investigate the properties of consolidated yttria. The results obtainedsuggest that the sintered material exhibits a relatively high concentration of oxygen vacancies. Ther-moluminescence measurements indicate that they act as electronic trapping sites. A generalized-orderkinetic analysis suggests that at least five different shallow traps can be identified.

Item Type:Article
ID Code:10644
Uncontrolled Keywords:Dense yttria samples, spark plasma sintering, reddish coloration, X-ray irradiation
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Deposited On:19 Jan 2015 15:48

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