Aerogels as Binder Materials

450°C being a direct consequence of the nanostructure. Thus, Carbon-AeroSand composites have a high potential as a new core and mold material for foundry applications (Chap. 36). 

RF aerogels are the basis of carbon aerogels. They are made of the following precursors formaldehyde, resorcinol, water, and a catalyst, as it is described earlier and in the literature [6, 8]. 

The strengths of Cartxui-AeroSands show the following correlation the strength decreases with reduction of the binder amount and with increasing grain sizes. The strength of sands with round grains is lower than that with splintery. 

The oxidation of the Carbon-AeroSand composites was investigated at different temperatures (Ji = 480°C, = 650°C) and binder amounts. The loss of weight was 

The complete oxidation is an outstanding property of the new material and was proved by X-ray scattering. Sand from Carbon-AeroSand is reusable without any further preparation of the material. 

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