nature and application of expandable graphite: expandable graphite is a graphite intercalation compound. the special layer lattice structure of flake graphite makes it possible to be intercalated by other chemicals. and it can expand after high temperature. because of chemical stability, it can be used in sealing rings, flame retardants, firebrick, crucibles, fire collars. in other applications like fire-stop putties, fire-stop pillows, expandable graphite had replaced other intumescent agents and used widely. 
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