Magnetic material particle size detection - Database & Sql Blog Articles

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The probe capacitor polarity needle has a head diameter of 5.8. The total length of the 7-pin and 12-pin needles is 5.

Kaixin micro test

How can the magnetic material powder that is agglomerated together be completely dispersed

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It is the primary prerequisite for obtaining correct particle size detection results.

The demand for magnetic materials and magnet products is steadily increasing every year in the world, but due to the overcapacity in the global ferrite and rare earth fields, only high-quality products have the opportunity to win the market. The detection and control of product particle size distribution is one of the key factors to ensure product quality. It is important for manufacturers and users to be able to use the correct particle size detection method to obtain the true particle size and particle size distribution of the magnetic material powder. What method is chosen to perform particle size detection on these magnetic materials? With the rapid development of laser technology, optoelectronic technology and computer technology in the 1970s,

Laser particle size analyzer

With its wide test range, easy operation, fast non-contact and good repeatability, it has been widely used.

Laser diffraction is the most appropriate method for measuring particle size and particle size distribution. Due to the special nature of magnetic materials, it is necessary to use a special dispersion method for magnetic materials. Can it be directly dispersed without degaussing? Is it more reliable and accurate to use dry dispersion for testing or wet dispersion for testing? In order to answer the above questions, our company has done a lot of experiments to find the best test method.

The first is the use of traditional wet dispersion for particle size detection. In wet dispersion, there are many factors that affect the dispersion effect. Most of them will choose ultrasonic waves for dispersion or dispersant in the dispersion to help disperse. Different dispersants have different effects on dispersion, but there is no way to disperse them into individual particles, and the agglomeration condition is still very serious.

From the experimental results, we can find that the dispersion and testing of magnetic materials by wet dispersion cannot be agglomerated together. At the same time, there is no unit that can provide a solvent or dispersant for dispersing magnetic materials (including zirconia, hard ferrite, etc.). Therefore, dry dispersion can be considered for particle size detection.