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|Title:||Preparation of conducting ultrafiltration membranes from redispersable, nanoscaled, crystalline SNO2:Sb particles|
Aegerter, Michel A.
Schmidt, Helmut K.
|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|
|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|
|Date of registration:||1-Sep-2010|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
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