Pyrolytic Graphite Tube Description
Pyrolytic graphite is a suitable material for manufacturing components in Graphite-AAS. The coated surface has verified carbon purity and exhibits no detectable porosity. Most pyrolytic graphite (PG) and pyrolytic boron nitride (PBN) products are custom manufactured; therefore, a lead time of 3–4 weeks is advised. A chemical vapour deposition (CVD) coating using silicon carbide is available for graphite products. The standard membrane thickness of pyrolytic graphite products measures between 30 and 50 µm.
Pyrolytic graphite (PG) is a synthetic material produced by the chemical vapour deposition (CVD) process. The carbon source for this method is natural gas, such as methane. Monitoring gas purity is easier than assessing the purity of solid graphite. This method yields pyrolytic graphite with impurity levels typically below 10 ppm. Pyrolytic graphite serves as a coating material for substrates including conventional graphite. The PG coating is produced using a CVD process with high-purity gas. This process produces a surface with carbon purity that meets quantifiable standards and exhibits no detectable porosity.
Specification of Pyrolytic Graphite Tubes
If pyrolytic graphite is deposited directly onto a mould instead of a graphite substrate, a substrate‐free product is obtained. This result is achieved when the CVD process is extended. The wall thickness of monolithic pyrolytic graphite products is normally 1 mm. Producing such products requires additional material and extended processing time. Consequently, costs are higher than for standard PG‐coated graphite products.