About the concept of particle size of metal powder

Some customers are not very familiar with the expression of metal powder particle size and often ask how to understand The Metal Powder particle size on the product information? Some materials are labeled with mesh size, while others are labeled with micrometers. How should we interpret them?

First of all, let's talk about the relationship between mesh size and micrometers. We use the simplest way to convert, micrometers=15000/mesh size. For example, if the mesh size is 5000 mesh Iron powder, micrometers are about 3 micrometers.

Secondly, ultrafine powders commonly used in the global market, such as carbonyl iron, carbonyl nickel, and cobalt/iron powder prepared by chemical methods, have particle sizes typically less than 10 microns and are commonly referred to as ultrafine powders.

Currently, it is popular internationally to use the calculated diameter of equivalent volume particles to represent particle size, measured in micrometers or millimeters. Particle populations are typically composed of a large number of particles of different sizes. Divided into several stages based on particle size, representing the relative content of particles in each stage, is called differential distribution; The cumulative distribution represents the total content of particles smaller than a certain order.

The maximum particle size is the equivalent diameter of the largest particle in the particle size distribution curve. The average particle size is the equivalent diameter of the largest particle in the particle size distribution curve when the cumulative distribution is 50%. The D90 particle size, D95 particle size, and D98 particle size are the equivalent diameters of the largest particles in the cumulative distribution curve at 90%, 95%, and 98%, respectively.