Talk:Aerosil

Uniqueness?
What makes Aerosil unique from generic silica fume? Based on this article, based on the content, it appears to just be a brand name; perhaps at most a result of a novel manufacturing method. Perhaps this could be merged into the silica fume article? It seems to me this topic is specific enough, and difficult enough to break into, that it would be easier to have all the information collected in a single article. -Verdatum (talk) 15:30, 20 January 2009 (UTC)


 * Good point, though I believe the right merge target would be fumed silica (that's also how the manufacturer describes it), rather than silica fume. Hqb (talk) 15:50, 9 February 2009 (UTC)


 * No problem to merge into fumed silica, Aerosil is just a brand name for fumed silica made by Evonik (earlier Degussa). --Langbein Rise (talk) 19:28, 9 February 2009 (UTC)


 * Agree with merge - brand name of fumed silica (and possibly? in partial use as a generic name like 'hoover')Shortfatlad (talk) 14:19, 6 April 2010 (UTC)

No, no merger at all! Aerosil (and identical products from other producers) is amorphous due to the low temperature in the synthesis. That "fumed silica" is crystalline and therefore will be dangerous causing silicosis when inhaled, wheras Aerosil does not. Another difference might be, that the particle diameters are not the same region. Why don't You ask somebody at Degussa to write some lines on this topic? —Preceding unsigned comment added by 93.221.228.90 (talk) 10:36, 4 December 2010 (UTC)

Synthesis
"made from vaporized silicon tetrachloride oxidized in high-temperature flame with hydrogen and oxygen."

What a nonsense! Oxidizing an silicon compound being already in the highest possible oxidation state, using hydrogen, a reducing agent!.

The tetrachloride is hydrolyzed by water vapour! —Preceding unsigned comment added by 93.221.228.90 (talk) 10:27, 4 December 2010 (UTC)