https://doi.org/10.1351/goldbook.C00829
An electrode for an electrical application. In its green state it comprises to produce highly
granular carbon
material bound with pitch
. The granular carbon
material may be either needle coke
, fine-grained or isotropic
coke
or reclaimed graphite
powder. Electrodes for use in steel production can only be manufactured from needle coke
, and the green electrodes are fired at temperatures above around graphite
electrodes. The other granular carbon
materials may be used for aluminium electrodes where the duty is not so severe, and the green electrodes are generally fired to lower temperatures.Note:
In both cases it is essential that the granular carbons and the
In both cases it is essential that the granular carbons and the
pitch
binders used in the production of the green electrodes have a low sulfur content as the release of sulfur during the high-temperature firing can lead to the production of significant porosity
.See also:
puffing
, graphitic carbon
, graphitization heat treatment
, isotropic carbon