Particle Size of Electrode Paste Powder
Particle size of electrode paste powder plays an important role in the electrode paste production process, as it determines the paste’s heating effect, mechanical strength, compression resistance and solution stability. It also affects the formation of inner grain structures of electrodes, which in turn affect the service life and electrical/thermal properties of electrodes.
In general, smaller particle sizes have a larger surface area, which can contribute to higher reactivity and increased amounts of surface contact between the electrodes. Smaller particle sizes also promote uniform dynamic distribution and an even surface coating during welding. It is important that particle sizes of electrode paste powder be carefully controlled to ensure the paste produces consistent and optimal welding results.
Researchers have developed numerous procedures for measuring and controlling the particle size of electrode paste powder. As well as providing a scientific basis for product optimization, these measurements can also be used to identify and analyze quality defects in the electrode paste.
In the first step of particle size analysis, the samples are usually homogenized using a mixer to create a powder suspension. This suspension is then filtered and screened to remove large particles. After this, the sample can be dried to allow the particles to separate. This can be done by either spraying the sample with a solvent and then evaporating the solvent or by using a vacuum chamber to evaporate the solvent. Once the sample is dry, the particles can be separated based on their size and shape using various instruments such as a sieve, screening apparatus and optical microscopy.
The second step of particle size analysis involves the use of computer models and software to determine the size and shape of each particle. These models take into account factors such as the total surface area of the particles, the size and shape of voids and surface features and the overall particle size distribution. The amount of information that can be gathered from these models makes them valuable for quality control and for predicting the performance of electrode paste powder.
Finally, particle size can also be measured and controlled during electrode paste production. For example, during the sintering process, the size of the particles is carefully monitored to ensure uniformity and optimal welding performance. This can be done with the help of optical microscopy, X-ray diffraction and other techniques.
Overall, particle size of electrode paste powder is a key factor in the quality and performance of the electrode paste. It is important to carefully measure and control particle size during the production process to ensure uniformity and optimal welding results.
