A graphite electrode is a long, thin rod that is used to conduct current in electrical devices and circuits. This is the most common electrical contact type for power generation. Its conductivity, also known as specific electrical resistance or impedance, is an important property that indicates how well it enables the passage of electric current. The better a graphite electrode conducts electricity, the higher its conductivity.
In this article you will find out how processing parameters, grain size and electrode manufacturing processes affect the conductivity of Graphite electrodes. We will examine the relationship between this conductivity and the surface roughness. This research is intended to provide insight on how these factors influence the performance of machining graphite.
Electrodes made from raw graphite can be produced in a variety of ways, depending on the requirements of each application. These electrodes, in most cases are made by mixing a raw materials with a binder and extruding the resultant shape. The binder material is an important factor, as it affects the overall electrical conductivity. A binder with a high quality will have a larger impact on the graphite's conductivity than one of lower quality.
Graphite's rough edges can also be smoothed using various milling and grinding methods. This improves machinability, and reduces wear on the tool. However, not only these processes affect the surface roughness, but also the grain sizes of the raw graphite. The finer the graphite grains are, the lower the resulting surface roughness will be.
Quantachrome Helium Multipycnometer was used to determine the true density of 23 electrodes. This method requires that a powdered particle be accurately measured and combines factors such as temperature, volume, pressure and surface area. The true mass of a graphite electrode is the mass excluding pores and open areas of a near net-shaped piece.
The HT2, SL2, & P3 electrodes were recorded in non-aqueous (methanol + 0.1 mol L-1 of H2SO4) media. These cyclic voltammograms are shown in Figure 2. HT2, SL2, P3, and SL2 all have similar morphologies but different properties, such as the 2D shoulder merging into the 1D area and the pore distribution.
The test data shows that the Performance+ addition significantly improved conductivity in the HT2, SL2, &P3 graphite electrodes. The increase in conductivity with Performance+ addition is due to an increased number of active sites on graphite particles. The voltammograms display redox peaks which correspond to a reduced oxidation capacity of the particles. This translates to higher electrical conductivity and decreased resistivity of the test series. The graphite electrodes with Performance+ performed significantly better compared to the synthetic control. This shows that Performance+ is a good additive to use in the manufacture of graphite electrodes.
English
Write a Message