Pyrolytic Graphite Sheet

Pyrolytic Graphite (PG) is a new type of carbon material. It is a kind of pyrolytic carbon with high crystalline orientation, which is deposited by chemical vapor deposition (CVD) on the graphite substrate at 1800°C – 2000°C under certain furnace pressure. It has high density (2.20 g/cm³), high purity (impurity content 0.0002%) and anisotropy of thermal, electrical, magnetic and mechanical properties. The vacuum of 10-7 mmHg can be maintained at about 1800°C.

Pyrolytic Graphite is a kind of carbon material on which hydrocarbon gas decomposes and deposits on the surface of hot solid. It is not real graphite but carbon material. Generally speaking, the carbon deposited above 1800°C is called pyrolytic graphite, and the carbon deposited below 1800°C is pyrolytic carbon.

The microstructure of pyrolytic graphite is mainly affected by deposition temperature and surface roughness of matrix. The round and uneven state can be seen on the deposition surface.

It is very stable to water, organic solvents and most acids and bases, but it is easy to act on chromic acid and chloric acid solution, concentrated sulfuric acid and concentrated nitric acid.

NCE can provide Pyrolytic Graphite (PG) Sheets and Discs as required. Various sizes can be customized. Please contact us for more details. Get a Quote Now! For other ceramic materials, please check our Ceramics catalog page.

Pyrolytic Graphite (PG) Production

Pyrolytic graphite crucible (about 2000°C) was used to decompose and polymerize hydrocarbons in a vacuum inert atmosphere to produce huge aromatic hydrocarbons, which were then deposited on the surface of high purity graphite matrix material and then made by dehydrogenation and recrystallization.

Features of Pyrolytic Graphite (PG) Sheets and Discs

1. Compact surface and good air tightness.
2. High temperature resistance. The strength increases with the increase of temperature. The strength reaches the maximum at 2750°C and sublimates at 3600°C.
3. Low modulus of elasticity, high thermal conductivity, low coefficient of thermal expansion, good thermal shock resistance.
4. Good chemical stability, corrosion resistance to acid, alkali, salt and organic reagent, no reaction with molten metal, slag and other corrosive media.
5. Oxidation is not obvious below 400°C in the atmosphere.
6. No gas is released at high temperature, and a vacuum of 10-7 mmHg can be maintained at about 1800°C.

* This form is for typical sizes. Other sizes are customizable. Thickness less than 8 mm.

Inquiries and orders should include the following information:

1. Quantity
2. Dimensions or drawings

Standard Packing: Sealed bags in carton boxes. Special package is available on request.