Natural Flake Graphite Vs Amorphous Graphite: What’s The Difference?
Publish Time: 2026-08-13 Origin: Site
Graphite is widely used in foundry, refractory materials, metallurgy, lubricants, carbon products and many other industrial applications. Among natural graphite products, flake graphite and amorphous graphite are two of the most commonly used types.
Although both are natural graphite materials, they differ significantly in crystal structure, carbon content, particle morphology, performance and cost. Understanding these differences can help buyers select a suitable graphite grade for their applications.
What Is Flake Graphite?
Natural flake graphite has a well-developed crystalline structure and typically appears as thin, plate-like flakes. It is mined from graphite ore and processed through crushing, grinding and flotation.
Flake graphite is available in different particle sizes and carbon grades, such as:
+32 mesh
+50 mesh
+80 mesh
+100 mesh
-100 mesh
Fine graphite powder
Depending on purification and processing requirements, fixed carbon content can range from commercial grades to high-purity graphite above 99% carbon.
Because of its crystalline structure, flake graphite generally offers good lubricity, electrical conductivity and thermal conductivity.
Typical applications include:
Refractory materials, foundry coatings, lubricants, conductive materials, expandable graphite, carbon products and other industrial applications.
Suggested Image:
Natural Flake Graphite close-up + different particle sizes.
What Is Amorphous Graphite?
Despite its name, amorphous graphite is still crystalline graphite, but its graphite crystals are extremely fine and are not easily visible to the naked eye.
It usually has a more earthy, powder-like appearance compared with natural flake graphite.
Commercial amorphous graphite is commonly supplied in different fixed-carbon grades and fine particle sizes, such as 200 mesh, 280 mesh, 325 mesh and customized particle distributions.
One of its main advantages is its combination of carbon content, fine particle distribution and economical cost, making it suitable for high-volume industrial applications.
It is widely used in:
Foundry | Casting | Refractory Materials | Steelmaking | Carbon Additives | Coatings | Lubrication
Suggested Image:
Amorphous graphite powder in a laboratory dish or industrial packaging.
Flake Graphite vs Amorphous Graphite
Property | Flake Graphite | Amorphous Graphite |
|---|---|---|
Type | Natural Graphite | Natural Graphite |
Appearance | Flake / Plate-like | Fine / Earthy Powder |
Crystal Size | Larger | Very Fine |
Fixed Carbon | Wide range, high-purity grades available | Usually lower commercial grades |
Conductivity | Generally Higher | Moderate |
Lubricity | Excellent | Good |
Typical Size | Flakes & Powder | Mainly Fine Powder |
Cost | Generally Higher | Generally More Economical |
Common Applications | Refractory, Conductive, Lubricant | Foundry, Casting, Refractory, Metallurgy |
Which Graphite Should You Choose?
There is no single graphite grade suitable for every application.
If the application requires high purity, good conductivity, lubricity or a well-developed crystalline structure, natural flake graphite may be preferred.
For applications requiring fine graphite powder, economical carbon sources and large-volume consumption, amorphous graphite can be a practical option.
For foundry and metallurgical applications in particular, buyers should evaluate not only fixed carbon but also particle size distribution, ash content, moisture, sulfur and other chemical components according to their production process.
Xingshi Carbon supplies different grades of natural flake graphite and amorphous graphite, with particle size and specifications available according to customer requirements.