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doi:10.22028/D291-24617
Titel: | Ultrafiltration conducting membranes and coatings from redispersable, nanoscaled, crystalline SnO2:Sb particles |
VerfasserIn: | Goebbert, Christian Aegerter, Michel A. Burgard, Detlef Nass, Rüdiger Schmidt, Helmut K. |
Sprache: | Englisch |
Erscheinungsjahr: | 1999 |
Quelle: | Journal of materials chemistry. - 9. 1999, 1, S. 253-258 |
Kontrollierte Schlagwörter: | Ultrafiltration Membran Sol-Gel-Verfahren Trennverfahren Wässrige Lösung Antimon Zinn |
DDC-Sachgruppe: | 620 Ingenieurwissenschaften und Maschinenbau |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Inorganic membranes prepared by the sol-gel method are promising candidates for use as filters in separation processes. Conducting supported membranes and coatings have been produced from redispersable nanoscaled crystalline Sb-doped SnO2 powders with Sb contents up to 10 mol%. The crystalline particles (ca. 4 nm) are fully redispersable in aqueous solution at ph ≥ 8 with a solid content up to 37 vol.% and are monosized. After thermal treatment at different temperatures and times, the pore size diameter of such a powder can be adjusted from 4-20 nm with a very narrow pore size distribution (ca. ±1 nm) and a total porosity of 63%, practically independent of the sintering parameters. Uniaxial compacted substrates (unsupported membranes) present similar characteristics but with a larger pore size distribution (± 5 nm) and 80% total porosity. Their electrical resistance decreases with sintering temperature and time to 4 Ω (800 °C, 8 h). Crack free transparent conducting coatings on glasses and ceramics have been obtained by spin-coating using fully dispersed aqueous solutions of the powder with volume content up to 7.8%. After thermal treatment (1 h at 550 °C) single layers 200 nm thick are still porous and exhibit specific electrical resistivity as low as p = 2.5 x 10-2 Ω cm with 90% transmission in the visible range. |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291-scidok-29260 hdl:20.500.11880/24673 http://dx.doi.org/10.22028/D291-24617 |
Datum des Eintrags: | 6-Jul-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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sm199909.pdf | 333,27 kB | Adobe PDF | Öffnen/Anzeigen |
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