The graphite felt is normally classified into asphaltic based graphite felt, PAN based graphite felt &rayon-based graphite felt. The mainly application is electric conduction in the photovoltaic industry, as the heat retaining material, thermal insulation material for the smelting furnace and vacuum furnace, and in chemical industry it could be the filtration material.
The carbon/ graphite felt is made of oxidized PAN short cut fiber. And after opening, carding,
lapping, needling,it is made into a certain density and thickness. Some excellent performances such as high purity, soft texture, No dus and chemical corrosion resistance will be obtained by
special carbonization and graphitization process .The carbon/graphite felt can improve the current
density of the liquid flow battery, and it has the protective effect on the corrosion resistance of the bipolar plate and is mainly used as the electrode of the liquid flow battery industry.
The graphite felt is formed after above 2000℃ high temperature treatment under inert gas or vacuum.The polypropylene cyano is the major raw material. The polypropylene cyano carbon felt or rayon-based carbon feltis cuttd into the specific dimension, and loaded into the graphite vessel after rolled. The graphite vessel will be setted in the high temperature furnace, protected in vacuum or by high pure inert gas. It's heated up to 2200-2500℃ with the heating rate 100-300℃/h, then get the final product after naturally cooled to 100℃.
PAN Based Carbon Felt is used in high temperature insulation in resistance or induction heated vacuum furnaces and inert gas furnaces. Made of carbon or graphite fibers, these materials have low thermal conductivity and vapor pressure. it is considerably less expensive and more effective than metallic radiation shields and may be used to replace them, with power savings of up to 75%. The low specific heat and low density permit rapid heating and cooling of furnaces.