Rigid material that consists of an infinite three-dimensional network
of sintered crystalline grains comprising metals bonded to carbon,
nitrogen or oxygen.
The term ceramic generally applies to any class of inorganic, non-metallic product
high temperature during manufacture or use.
PAC, 2007, 79, 1801
(Definitions of terms relating to the structure and processing of sols, gels, networks,
and inorganic-organic hybrid materials (IUPAC Recommendations 2007))
on page 1810