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Effect of freeze-drying treatment on the optical properties of SPS-sintered alumina
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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2013 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 39, no 6, 6669-6672 p.Article in journal (Refereed) Published
Abstract [en]

This study looks at the influence of alumina powder processing on the preparation of transparent alumina by Spark Plasma Sintering (SPS). Zeta potential measurements were carried out on alumina suspensions in order to determine the best dispersion conditions. Stable slurries were submitted to a spray freeze drying process and their sintering behavior was compared with the corresponding non spray freeze dried powders. Transparent alumina samples were successfully prepared from alumina powders by Spark Plasma Sintering. An optical model considering pore and grain size distributions has been developed to obtain information about porosity in dense materials. It was found that the final density and, accordingly, the optical properties were improved when spray freeze dried starting powder was used.

Place, publisher, year, edition, pages
2013. Vol. 39, no 6, 6669-6672 p.
Keyword [en]
Sintering, Optical properties, Al2O3
National Category
Materials Engineering
URN: urn:nbn:se:su:diva-92112DOI: 10.1016/j.ceramint.2013.01.104ISI: 000320295300082OAI: diva2:637788


Available from: 2013-07-22 Created: 2013-07-19 Last updated: 2013-07-22Bibliographically approved

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Nygren, MatsZhao, Zhe
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