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Verfahren zur Herstellung von Beschichtungen aus Spinell sowie Verwendung der danach hergestellten Traeger

Verfahren zur Herstellung von Beschichtungen aus Spinell (A1)
Process for the production of coatings made of spinel
 
: Pflanz, K.; Chmiel, H.; Riedel, R.

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Frontpage ()

DE 1991-4130969 A1: 19910918
DE 1992-4227720 A: 19920821
DE 4227720 C2: 19980520
C04B0035
German
Patent, Electronic Publication
Fraunhofer IGB ()

Abstract
The invention relates to a process for the production of coatings made of spinel (MgO*Al<-2 O<-3, MgAl<-2 O<-4 ), and carriers provided with a spinel coating, and in particular a process for the production of porous filtration membranes having a selective coating made of spinel. A mixed magnesium-aluminium-alkoxide (magnesium-aluminium double alkoxide) of the formula (I) or (II), MgAl<-2 (OR)<-8 or Mg<><-2 is hydrolyzed, whereby the residue R represents branched or linear alkyl groups having 1 to 10 C atoms, the resultant magnesium-aluminium hydroxide suspension is peptized with an acid, the peptized magnesium-aluminium hydroxide suspension is allowed to age until a colloid magnesium-aluminium hydroxide solution results, a carrier is coated with the colloid magnesium-aluminium hydroxide solution and the coated substrate is dried and calcined.

: http://publica.fraunhofer.de/documents/PX-39241.html