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doi:10.22028/D291-24640
Titel: | Preparation of conducting ultrafiltration membranes from redispersable, nanoscaled, crystalline SNO2:Sb particles |
VerfasserIn: | Goebbert, Christian Burgard, Detlef Nass, Rüdiger Aegerter, Michel A. Schmidt, Helmut K. |
Sprache: | Englisch |
Erscheinungsjahr: | 1999 |
Quelle: | Ceramics - getting into the 2000's / ed. by P. Vincenzini. — Part D. - Faenza : Techna, 1999. — (Advances in science and technology ; 16), S. 441-448 |
Kontrollierte Schlagwörter: | Nanopartikel Ultrafiltration Biomembran Kompositmembran Membran Sol-Gel-Verfahren Trennverfahren Wässrige Lösung |
DDC-Sachgruppe: | 620 Ingenieurwissenschaften und Maschinenbau |
Dokumenttyp: | Konferenzbeitrag (in einem Konferenzband / InProceedings erschienener Beitrag) |
Abstract: | Inorganic membranes prepared by the sol gel method are promising for use as filter in separation processes. Unsupported and supported conducting membranes have been produced from redispersable nanoscaled crystalline Sb-doped SnO2 powders with a Sb content up to 5 mole % (with respect to Sn). The crystalline particles are monosized (~4 nm) and fully redispersable in aqueous solution at pH >= 8 with a solid content up to 36.8 vol%. By thermal treatment at different temperatures and times, the pore size diameter of the material can be adjusted from 4 to 20 nm with a very narrow pore size distribution (~ +-1 nm) and a total porosity of 63%, practically independent of the sintering parameters. Uniaxial compacted unsupported membranes present similar characteristics with however larger pore size distribution (+-5 nm) and 80% total porosity. Their electrical resistance decreases with sintering temperature and time down to 4 Omega (800°C, 8 h). Fully dispersed aqueous solutions of the powder (7,8 vol%) were used to prepare transparent conducting porous coatings on glass or ceramics by spin-coating. AFter thermal treatment (1 hour at 550°C) single layers 200 nm thick have a typical specific electrical resistance p=2.5-10-² Omega cm and an optical transmission in the visible range measured against air of 90%. |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291-scidok-29554 hdl:20.500.11880/24696 http://dx.doi.org/10.22028/D291-24640 |
ISBN: | 88-86538-17-0 |
Datum des Eintrags: | 1-Sep-2010 |
Fakultät: | SE - Sonstige Einrichtungen |
Fachrichtung: | SE - INM Leibniz-Institut für Neue Materialien |
Sammlung: | INM SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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sm199931.pdf | 2,99 MB | Adobe PDF | Öffnen/Anzeigen |
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