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Effect of freeze-drying treatment on the optical properties of SPS-sintered alumina

AuthorsSuárez, Marta ; Fernández, Adolfo ; Menéndez, José Luis ; Nygren, M.; Torrecillas, Ramón ; Zhao, Z.
Issue Date2013
CitationCeramics International 39(6): 6669-6672 (2013)
AbstractThis 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. © 2013 Elsevier Ltd and Techna Group S.r.l.
Identifiersdoi: 10.1016/j.ceramint.2013.01.104
issn: 0272-8842
Appears in Collections:(CINN) Artículos
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