Selected properties of graphite that make it useful for so many applications:
Graphite, like diamonds, are a form of carbon and is an extremely strong, stable and chemically inert material
Both thermal and electrical conductivity are properties of graphite that make it useful for everything from insulation to battery materials.
Graphite’s high tolerance for heat makes it the best material for applications including furnace components and crucibles.
The layered physical structure of natural flake graphite particles accounts for the lubricity of the material