The Difference Between Flake Graphite and Expanded Graphite

Flake graphite is a type of natural graphite. After mining, it undergoes purification and typically takes on a fish-scale-like form, hence the name “flake graphite.” Expandable graphite is produced when flake graphite undergoes acid washing and intercalation treatment, causing it to expand to approximately 300 times its original size. It can be used as raw material for rolled products and flexible graphite. Below, we will provide a detailed introduction to the differences between flake graphite and expandable graphite:

Flake graphite is a type of natural graphite. After being mined and purified, it generally takes on a fish-scale-like form, hence the name “flake graphite.” Expandable graphite is produced when flake graphite undergoes acid washing and intercalation treatment, causing it to expand to about 300 times its original size. It can be used as raw material for roll stock and flexible graphite. Below, we will provide a detailed introduction to the differences between flake graphite and expandable graphite:

1. Flake graphite has a wider range of applications than expandable graphite

In industrial production, flake graphite not only possesses the functions of expandable graphite but also exhibits significantly better electrical conductivity, thermal conductivity, and lubricity. Therefore, it has a broader range of practical industrial applications.

2. The production processes for flake graphite and expandable graphite differ

Flake graphite is primarily produced through mechanical crushing and grinding. Expandable graphite, on the other hand, is primarily produced through processing methods such as impregnation with acidic chemical solutions, making its production process more complex than that of flake graphite.

3. Flake graphite has a finer particle size than expandable graphite

Flake graphite is generally processed to a finer particle size, while expandable graphite has a coarser particle size. Due to the expansion properties of expandable graphite, a coarser particle size facilitates the expansion process, which is why expandable graphite has a coarser particle size.

Since its establishment, Qingdao Jinhui Graphite Co., Ltd. has adhered to the principles of efficiency and integrity, placing the customer first. The company is committed to producing and selling high-quality flake graphite products and striving to build a renowned brand in the graphite industry. It has received awards such as the “Outstanding Contribution Enterprise” from the local government for multiple consecutive years, has been recognized as a “Contract-Abiding and Creditworthy Enterprise” in Qingdao, and won the Gold Award in the Raw Materials Zone at the 2016 China International Advanced Carbon Materials Application Expo.