Expanded Graphite
Expanded graphite ( vermicular graphite), a graphite that produced by the expandable graphite at high temperatures. The morphological structure of vermicular graphite is the type of graphite between the shape of flake graphite and that of spherical graphite. It has the structural characteristics of flake graphite connected with graphite in eutectic group in matrix.The result show that the infrared attenuation performance of expanded graphite is better than that of natural flake graphite. The milimeter wave attenuation of expanded graphite is a comprehensive actions of scattering and absorption.
Product Info
Expanded graphite is derived from natural graphite. Its layered structure allows molecules to be intercalated between the graphite layers.
- Through the incorporation of acids (usually sulfuric acid), natural graphite can be converted into expandable graphite.
- When heated, the graphite flakes in expandable graphite expand significantly (up to a multiple of their original volume). The main products typically have a starting temperature in the range of 200°C.
- The expanded flakes take on a distinctive "worm-like" appearance and are generally several millimeters long.Key physical characteristics include:
- Carbon content: 85% to 99%
- Expansion rate: 30–400 cm³/g
- Particle size: 80% < 75 µm and 80% > 500 µm
- Starting temperature: 140°C to 230°C.
Specification
Specification Carbon(%) Volatile(%) Moisture(%) Initial expansion temperature Expansion ratios PH Mesh Particle size(%) KP Low temperature 90-99 13≤ ≤1 130-150℃ 200-300 3-8 80 or 50 ≥80 KP Low temperature 90-99 13≤ ≤1 240-280℃ 200-300 3-8 80 or 50 ≥80 KP32 85-99.9 13≤ ≤1 150-230℃ 200-400 3-8 32 ≥80 KP50 85-99.9 13≤ ≤1 150-230℃ 150-300 3-8 50 ≥80 KP80 85-99.9 13≤ ≤1 150-230℃ 100-200 3-8 80 ≥80 KP100 85-99.9 13≤ ≤1 150-230℃ 100-130 3-8 100 ≥80 KP-100 85-99.9 150-230℃ 50-150 -100 ≥80 KP-200 85-99.9 50-150 -200 ≥80 Application
Application: can be used as sealing material, flame retardant material, adsorption material, medical treatment, expansion worm powder can be used as lithium battery material.
