What is the Difference Between Graphite Electrode and Glassy Carbon Electrode?

Oct. 30, 2020

As a Graphite Electrodes Solutions Supplier, share with you. Graphite electrode uses petroleum coke as aggregate and coal tar pitch as a binder. After a series of processes such as pulverization, batching, kneading, molding, roasting, impregnation, graphitization, and mechanical processing, a high-temperature oxidation-resistant conductive material is prepared. Graphite block is a kind of artificial graphite, and artificial graphite is made by artificial heating of coke products. Generally, if it is purified to make high purity, or carbon fiber, the added value is high. Graphite electrodes are mainly made of petroleum coke and needle coke as raw materials, coal tar pitch as a binder, and are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. It releases electric energy in the form of electric arc in an electric arc furnace. The conductors that heat and melt the charge can be divided into ordinary power, high power and ultra-high power according to their quality indicators. Graphite electrodes mainly include four types of ordinary power graphite electrodes, anti-oxidation coating graphite electrodes, high power graphite electrodes and ultra-high power graphite electrodes.

Graphite Electrodes

Graphite Electrodes

Graphite electrodes have excellent electrical properties and chemical stability, high mechanical strength at high temperatures, low impurity content, and good vibration resistance. It is a good conductor of heat and electricity.

It can be widely used in enterprise steelmaking electric arc furnaces, refining furnaces, submerged arc furnaces for the production of Chinese ferroalloy, industrial silicon, yellow phosphorus, corundum, and other smelting furnaces that use network arcs to affect high temperatures. According to the difference of power and current, it can be divided into ordinary power graphite electrode, high power graphite electrode and ultra high power graphite electrode. According to the different electrode diameter, there are different specifications from 75 to 600mm. Special specifications of graphite electrodes and special-shaped graphite products can be processed according to the special requirements of customers.

Glassy Carbon Electrode

When the stripping voltammetry is carried out within the research range of a more positive potential, a glassy carbon electrode can be used. The glassy carbon electrode has a high hydrogen overpotential, good conductive material performance, strong chemical resistance, and a smooth surface that is not easy to adhere to gas and dirt. The original electrode used as a modified working electrode and a reaction of oxidation technology reduction can be measured. 

The first step of solid electrode surface treatment is mechanical grinding and polishing to mirror level, especially when the electrode surface has an inert layer or a very strong adsorption layer, it must be treated by mechanical or heating methods.

After each polishing, first clean the surface dirt, then clean it in an ultrasonic water bath, and repeat it three times in 2 to 3 minutes, each time. Finally, use 1:1 ethanol, 1:1 nitric acid and distilled water for ultrasonic cleaning. In the 0.5-1mol/lh2so4 solution, the electrode is activated by cyclic voltammetry in the scanning range of 1.0-1.0 v, and the scanning is repeated until a stable cyclic voltammogram is obtained. Our company also has Graphite Electrodes on sale, welcome to contact us.

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