(expandable graphite)
Expandable graphite originates from raw graphite ore subjected to chemical intercalation. When heated rapidly above 300°C, this inorganic graphite compound expands up to 300 times its original volume. The expansion mechanism creates vermiform structures with exceptional thermal resistance and adsorption capacity, making it indispensable in flame-retardant applications.
Compared to traditional fireproofing materials, expandable graphite
demonstrates:
These properties stem from its unique layered structure, enabling superior performance in extreme conditions.
Manufacturer | Expansion Rate | Purity Level | Max Temp Resistance | Price/Ton (USD) |
---|---|---|---|---|
Asbury Graphite | 280x | 99.2% | 1100°C | $5,800 |
GrafTech | 310x | 98.7% | 1250°C | $6,450 |
Xincheng Graphite | 265x | 97.9% | 950°C | $4,200 |
Specialized grades address distinct operational needs:
Major implementations include:
Production processes now achieve:
Emerging R&D focuses on expandable graphite hybrids with graphene (17% conductivity improvement) and phase-change material integration. Market projections indicate 8.9% CAGR through 2030, driven by renewable energy storage demands and stricter fire safety regulations globally.
(expandable graphite)
A: Expandable graphite is a form of graphite treated with acids to enable thermal expansion. It is widely used as a flame retardant in construction materials and for sealing applications due to its ability to expand under heat.
A: Raw graphite is the natural, unprocessed form of carbon with layered structures. Unlike expandable graphite, it lacks chemical treatment, making it unsuitable for applications requiring thermal expansion or flame resistance.
A: Inorganic graphite refers to natural or synthetic graphite not organically modified. It is used in lubricants, batteries, and refractory materials due to its thermal stability and conductivity.
A: Production involves treating raw graphite with sulfuric or nitric acid, creating intercalated compounds. The acid-treated graphite is then washed, dried, and heated to trigger expansion, forming the final product.
A: Yes, inorganic graphite (like natural flake graphite) is the primary raw material. Through acid intercalation and thermal processing, it is chemically modified to become expandable graphite.
Related News