ZHENGSHAN TECHNOLOGY

Electrode paste is an important material used in the production of electrodes, widely used in industries such as metallurgy, chemical engineering, and mechanical manufacturing. Its main components include asphalt coke, petroleum coke, and coal tar. In order to better understand and apply electrode paste, this article will explore its physical and chemical properties in detail.

1. Physical characteristics
1.1 Appearance and Form
Electrode paste is usually in the form of solid blocks or particles, with colors ranging from dark brown to black. Its appearance depends on the type of raw materials and processing technology.

1.2 Density
The density of electrode paste is generally between 1.20-1.45 g/cm ³. The density directly affects the quality and service life of the electrode. High density electrode paste usually has better conductivity and mechanical strength.

1.3 Particle size distribution
The particle size distribution of electrode paste has a significant impact on its fluidity and filling performance. Usually, the particle size range of electrode paste is between 1-50 mm, and the specific particle size distribution needs to be adjusted according to actual applications.

2. Chemical characteristics
2.1 Composition analysis
The main components of electrode paste include carbonaceous materials (such as asphalt coke and petroleum coke) and binders (such as coal tar). These components determine the conductivity and thermal stability of the electrode paste.

2.2 Ash content
Ash content refers to the content of non carbonaceous impurities in electrode paste. Generally speaking, the lower the ash content, the better the conductivity and thermal stability of the electrode paste. The ash content of high-quality electrode paste is usually less than 1%.

2.3 Volatile Matter Content
The volatile content refers to the amount of volatile substances in the electrode paste. At high temperatures, these volatiles will gradually escape, affecting the sintering quality and service life of the electrode. Usually, the volatile content of electrode paste should be controlled between 10% and 15%.

3. Thermal properties
3.1 Coefficient of thermal expansion
The thermal expansion coefficient of electrode paste at high temperatures is relatively low, usually between 1-2 × 10 ⁻⁶/℃. This helps maintain the dimensional stability of the electrode at high temperatures.

3.2 Thermal conductivity
The thermal conductivity of electrode paste is closely related to its conductivity. Generally speaking, the higher the thermal conductivity, the better the heat dissipation performance of the electrode, which helps to extend the service life of the electrode. The thermal conductivity of electrode paste is usually between 20-40 W/(m · K).

4. Electrical characteristics
4.1 Electrical resistivity
The electrical resistivity of electrode paste is an important indicator for measuring its conductivity. Usually, the resistivity of electrode paste is between 0.01-0.1 Ω· cm. The lower the resistivity, the better the conductivity of the electrode.

4.2 Current carrying capacity
The current carrying capacity of electrode paste is closely related to its conductivity and thermal stability. Electrode paste with high current carrying capacity can work stably under high current conditions and is not prone to breakage or burning.

5. Mechanical properties
5.1 Compressive strength
The compressive strength of electrode paste reflects its ability to withstand pressure. Usually, the compressive strength of electrode paste is between 20-40 MPa. High compressive strength helps to improve the service life and safety of electrodes.

5.2 Flexural strength
The flexural strength refers to the ability of electrode paste to resist bending damage. Usually, the flexural strength of electrode paste is between 10-20 MPa. High flexural strength helps prevent electrode breakage during use.

6. Usage performance
6.1 Sintering performance
The sintering performance of electrode paste at high temperatures directly affects the quality of the electrode. Good sintering performance helps to form a dense and uniform electrode structure, improving the conductivity and mechanical strength of the electrode.

6.2 Service life
The service life of electrode paste is closely related to its conductivity, thermal stability, and mechanical strength. High quality electrode paste can work stably for a long time under high temperature and high current conditions, and is not easily broken or burned.