Please use this identifier to cite or link to this item:
doi:10.22028/D291-24640
Title: | Preparation of conducting ultrafiltration membranes from redispersable, nanoscaled, crystalline SNO2:Sb particles |
Author(s): | Goebbert, Christian Burgard, Detlef Nass, Rüdiger Aegerter, Michel A. Schmidt, Helmut K. |
Language: | English |
Year of Publication: | 1999 |
OPUS Source: | Ceramics - getting into the 2000's / ed. by P. Vincenzini. — Part D. - Faenza : Techna, 1999. — (Advances in science and technology ; 16), S. 441-448 |
SWD key words: | Nanopartikel Ultrafiltration Biomembran Kompositmembran Membran Sol-Gel-Verfahren Trennverfahren Wässrige Lösung |
DDC notations: | 620 Engineering and machine engineering |
Publikation type: | Conference Paper |
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 to this record: | 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 |
Date of registration: | 1-Sep-2010 |
Faculty: | SE - Sonstige Einrichtungen |
Department: | SE - INM Leibniz-Institut für Neue Materialien |
Collections: | INM SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Files for this record:
File | Description | Size | Format | |
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sm199931.pdf | 2,99 MB | Adobe PDF | View/Open |
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