808121
Expandable Graphite
flakes
Synonyme(s) :
Graphite intercalation compound, Intumescent flake graphite
Se connecterpour consulter vos tarifs contractuels et ceux de votre entreprise/organisme
About This Item
Formule linéaire :
C24(HSO4)(H2SO4)2
Code UNSPSC :
12352200
Nomenclature NACRES :
NA.23
Produits recommandés
Description
Expansion Ratio (X:1): 270 to 325
Niveau de qualité
Forme
flakes
Taille des particules
+50 mesh (>300μ, ≥75% minimum)
pH
5-10
Solubilité
water: insoluble
Catégories apparentées
Description générale
Expandable graphite is a synthesized intercalation compound of graphite that expands or exfoliates when heated. This material is manufactured by treating flake graphite with various intercalation reagents that migrate between the graphene layers in a graphite crystal and remain as stable species.
If exposed to a rapid increase in temperature, these intercalation compounds decompose into gaseous products, which results in high inter-graphene layer pressure. This pressure develops enough force to push apart graphite basal planes in the “c” axis direction. The result is an increase in the volume of the graphite of up to 300 times, a lowering of bulk density, and approximately a 10-fold increase in surface area.
If exposed to a rapid increase in temperature, these intercalation compounds decompose into gaseous products, which results in high inter-graphene layer pressure. This pressure develops enough force to push apart graphite basal planes in the “c” axis direction. The result is an increase in the volume of the graphite of up to 300 times, a lowering of bulk density, and approximately a 10-fold increase in surface area.
Application
- Graphene precursor.
- Inorganic source of carbon.
- Filler.
- Thermal additive.
- Fire retardant additive.
- Casting powders.
- Plastic additive.
- Rubber additive.
- EMF absorber.
- Milling and sieving.
- Bulk loading, unloading.
- Base material for gaskets and seals.
- Coatings.
Mention d'avertissement
Warning
Mentions de danger
Conseils de prudence
Classification des risques
STOT RE 2 Inhalation
Organes cibles
Lungs
Code de la classe de stockage
13 - Non Combustible Solids
Classe de danger pour l'eau (WGK)
WGK 1
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Faites votre choix parmi les versions les plus récentes :
Déjà en possession de ce produit ?
Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.
Les clients ont également consulté
Siegfried Eigler
Chemical communications (Cambridge, England), 51(15), 3162-3165 (2015-01-22)
Graphite sulphate is used as a precursor to graphene for the first time. The positively charged graphene layers react with water to yield a processable graphene derivative. The unprecedented low density of defects is determined to be 0.06% on average
Electrochemical reactivation of expanded graphite electrodes covered by oligomeric products of phenol electrooxidation.
Krawczyk P, and Skowronski, JM.
Electrochimica Acta, 79, 202-209 (2012)
Nicolas R Tanguy et al.
ChemSusChem, 14(4), 1057-1067 (2020-11-28)
The increasing demand for wearable electronics has driven the development of supercapacitor electrode materials toward enhanced energy density, while being mechanically strong, flexible, as well as environmentally friendly and low-cost. Taking advantage of faradaic reaction of quinone groups in natural
Ayrat M Dimiev et al.
ACS nano, 6(9), 7842-7849 (2012-08-14)
Graphite intercalation compounds (GICs) can be considered stacks of individual doped graphene layers. Here we demonstrate a reversible formation of sulfuric acid-based GICs using ammonium persulfate as the chemical oxidizing agent. No covalent chemical oxidation leading to the formation of
Notre équipe de scientifiques dispose d'une expérience dans tous les secteurs de la recherche, notamment en sciences de la vie, science des matériaux, synthèse chimique, chromatographie, analyse et dans de nombreux autres domaines..
Contacter notre Service technique