Process	Sol-gel
	The sol-gel process is increasingly used to obtain glasses or ceramics in an appropiate form: powder, film, fibers, etc. The results of the process are very fine particles which can be sintered to very high densities. The technique consists in the formation of a three dimensional network of inorganic matter (gel) from colloidal or molecular solution of the precursor (sol), by low temperature polymerisation. The "wet" gel is dried to remove water. The porous gel is then converted into glass or ceramic.
Category	Mass conserving processes, Powder technology
Materials	Ceramics Glasses Aerogels
Photo	Thomas Nissen (Computer graphics)
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