Pyrolytic Graphite

Pyrolytic Graphite

 

(also called pyrographite), a poly-crystalline carbonaceous material that is deposited from the gas phase during pyrolysis of hydrocarbons at temperatures that range from 750° to 2400°C.

Depending on the conditions of pyrolysis, including temperature, concentration of initial materials, and type of diluent, pyrolytic graphite can have high density or low density as well as anisotropic or practically isotropic properties. Two brands of pyrolytic graphite are used in the USSR: PGV graphite, which is highly anisotrophic, and PGI graphite, which is isotropic. Pyrolytic graphite has high thermal stability and lacks open pores. It is used to make crucibles and other apparatus for the production of semiconductors, glass, single-crystal materials, and pure metals. PGI graphite is used as an antifriction packing material, and PGV graphite is used for erosion-resistant coatings.

References in periodicals archive ?
Tenders invited for Supply of Pyrolytic graphite carbon square foils
Chmelik, "Biocompatibility of the surface layer of pyrolytic graphite," Thin Solid Films, vol.
The bismuth-film electrode consists of a bismuth film deposited on a substrate, which can be Au [19], Pt [20], carbon paste [21], glassy carbon [22], carbon fiber [23], pyrolytic graphite [24], and oxides [3, 25, 26].
Highly oriented pyrolytic graphite (HOPG; Advanced Ceramics, ZYH grade, mosaic spread = 3.5 [+ or -] 1.5[degrees]) was used as a model electrode for in situ AFM imaging, which was carried out for freshly cleaved HOPG surfaces.
The Redmi 5A sports a Metallic matte finish and features dual pyrolytic graphite sheets at the back, which the company claims keeps the smartphone 1 degree cooler.
Xiaomi says that it's using pyrolytic graphite sheet to improve thermal dissipation in the phone.
The work carried out by Geim and Novoselov in 2004 was a simple exfoliation method in which protrusions of highly-oriented pyrolytic graphite (HOPG) were embedded in photoresist and adhesive tape was used to successively peel off layers of graphene [2].
Passive cooling technologies include heat pipe assemblies, vapor chamber assemblies, phase change materials (PCM), and advanced solid conduction materials, such as k-Core[R] encapsulated Annealed Pyrolytic Graphite (APG).
Novoselov and Geim [6] firstly observed a single layer of graphene from highly oriented pyrolytic graphite using micromechanical exfoliation method.
Proplast I, pyrolytic graphite bonded to Teflon (polytetrafluoroethylene-PTFE) was later replaced by Proplast II, in which PTFE is bonded to aluminum oxide.
The graphene based nonlinear mixing component has been completed by covering the gap with a few layer graphene film, exfoliated from a highly oriented pyrolytic graphite. A photo of the entire graphene based frequency mixer is presented in Fig.
Starting graphite materials, such as artificial graphite, flake graphite powder, kish graphite, natural flake graphite, and highly oriented pyrolytic graphite, also influence the graphene products.