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Nano-Korund - Synthese und Anwendung für Filtrationsmembranen, Katalysatorträger, Verschleißschutz und Sensoren

Nano corundum - synthesis and use for filtration membranes, catalyst supports, wear prevention, and sensors
: Ma, H.; Krell, A.; Buse, F.


Chemie- Ingenieur- Technik 73 (2001), No.1-2, pp.93-97
ISSN: 0009-286X
Journal Article
Fraunhofer IKTS ()
alumina; nanoparticle; powder

Corundum nanoparticles (<100 nm) were prepd. by a powder and a sol/gel procedure (from Al(NO3)3/NH4OH and Al sec-butoxide/EtOAc/H2O, resp.). Adjustment of hydrolysis conditions and inoculation with diaspore yielded Al2O3 particles which transform to corundum at a temp. as low as thus preventing crystal growth and agglomeration during calcination. Filter membranes, coatings, and compact sintered products produced from the particles are characterized.