The unique baking and use method of the electrode paste itself puts forward very high requirements on its plasticity. The electrode has relatively porous holes and is prone to “hard break” accidents; if the plasticity is too good, the asphalt is easy to migrate under the pressure generated by its own weight and volatiles during the softening process of the electrode paste, resulting in flow paste and segregation. Easily lead to “soft disconnection” accidents.
Plasticity is a very important indicator of electrode paste. At present, for the plasticity of the paste, most factories judge the plasticity of the paste based on their actual production experience, and adjust the plasticity of the paste by adjusting the amount of asphalt or adding additives. The plasticity of the electrode paste is closely related to its elongation, which can be characterized by the elongation. The key point of electrode paste elongation test is to press it into a cylinder of specified size, and measure its relative elongation at a fixed slope at 200℃ for 1 h. In the experiment, the plastic quality of the electrode paste was studied by changing the amount of pitch added and using different additives, and the relationship between the plasticity of the electrode paste and its performance was studied and analyzed.