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Influence of Co-Doping on the Sintering Path and on the Optical Properties of a Submicronic Alumina Material

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Sintering in air was performed on pure and CaO/TiO2 co-doped slip cast α-alumina samples. The relative density/grain size relationship, referred to as sintering path, has been obtained for each composition. Fully dense samples were obtained after an additional hot isostatic pressing (HIP) step on the pure and doped materials. After grinding and polishing, the optical properties were measured on flat windows (thickness around 1 mm) in the ultraviolet, visible, close-infrared, and mid-infrared ranges. The influence of a tiny residual porosity on the optical properties, impossible to quantify using standard methods, has been investigated.
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Document Type: Research Article

Affiliations: 1: Laboratoire de Synthèse et Fonctionnalisation des Céramiques, FRE 2770 CNRS/Saint-Gobain, Saint-Gobain C.R.E.E., 84306 Cavaillon Cedex, France 2: Laboratoire de Structure et Propriétés de l'Etat Solide, UMR 8008 CNRS, Université des Sciences et Technologies de Lille, Bâtiment C6, 59655 Villeneuve d'Ascq Cedex, France

Publication date: May 1, 2008

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