Téléchargement | - Voir le manuscrit accepté : Sintering effects related to filtration properties of porous continuously gradient ceramic structures (PDF, 756 Kio)
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Auteur | Rechercher : Darcovich, K.1; Rechercher : Roussel, D.; Rechercher : Toll, F. N.1 |
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Affiliation | - Conseil national de recherches du Canada. Institut de technologie des procédés chimiques et de l'environnement du CNRC
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Format | Texte, Article |
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Sujet | Ceramic support structure; Functionally gradient material; Porosimetry; Permeation and separation tests |
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Résumé | A single-step processing method has been previously established to prepare porous alumina microstructures by a controlled sedimentation technique whereby fine powder from an aqueous suspension consolidates over a casting slab. Metastable surface chemical control of the suspension properties was able to produce a highly porous flat disc structure with a continuously increasing mean pore size from top to bottom. Formation of this gradient structure was facilitated by using a relatively broad particle size distribution. Top layer pore sizes less than 50 nm have been achieved. Without modification, these structures are suitable for use as ultrafiltration media. The present work presents a comparison of properties and performance data for samples made with the above mentioned functionally gradient characteristics, to samples made with a more uniform microstructure. The effects of sintering time and temperature were analysed in view of overall porosity, pore size distribution and the extent of densification from the green state. These results are presented along with permeation measurements from a filtration test module. |
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Date de publication | 2001 |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro du CNRC | NRCC 42016 |
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Numéro NPARC | 8925806 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 66f4b689-f809-45ed-8e4a-cc139a39faa7 |
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Enregistrement créé | 2009-04-23 |
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Enregistrement modifié | 2020-03-27 |
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