As a manufacturer of electrode paste, we understand that the process of sintering plays a crucial role in determining the quality and performance of our product. During this process, volatile matter in the paste can evaporate and impact the final product’s properties. In this blog post, we will explore the changes in volatile matter that occur during the sintering of electrode paste. By understanding these changes, we can optimize our sintering process and produce electrode paste with enhanced properties for our customers.
The volatile of the self-baking electrode decreases with the increase of temperature, so the lower the position of the electrode during the sintering process, the less the volatile content and the denser the electrode. The volatile matter with a relatively low boiling point in the electrode paste is discharged from the upper port of the electrode cylinder in a small amount.
With the intensification of the thermal decomposition process of the binder, low-molecular-weight volatile is discharged, high-molecular substances are condensed into coke, the volume of the electrode shrinks, and a gap is formed between the electrode and cylinder, and a large amount of volatile is discharged from crevice. The volatile content of the electrode paste decreases sharply, from above 10% to below 4%. When the temperature is higher than 650°C, the volatile content slowly decreases to zero. At this time, the electrode temperature is nearly 1000°C, and the electrode paste has been baked into dense electrode.
If the volatile content is too high, it will easily cause the following adverse effects:
- It is not easy to sinter and has high flexibility, which is very easy to cause soft or hard breaking.
- The oxidation is fast and the electrode paste is consumed quickly.
- It is very easy to sinter into different shapes in layers, cause it difficult to lower the electrodes.
- When lower the electrodes, the load is reduced more while increased slowly, which affects the production.
If the volatile content is too low, it will cause the following adverse results:
- Premature sintering, insufficient cohesiveness, poor strength, causing hard breaking.
- The contact resistance between electrode and conductive jaw plate is large, which affects the power consumption and the life of the jaw plate.
In summary, the impact of too high volatile content is worse than too low volatile. Therefore, the volatile of electrode paste must be controlled within a certain range, which is determined by furnaces. At Saxin Carbon, we are committed to delivering top-quality electrode paste that meets the industry’s highest standards. Contact us today to learn more about our electrode paste solutions and how we can help you optimize your production process.
