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Definition of equivalent particle size

Release date:2018-04-26  source:粉体网  Browse times:643
      The shape of the actual particles is usually non-spherical. When a physical property of a particle is the same or similar to that of a homogeneous spherical particle, we use the diameter of the spherical particle to represent the diameter of the actual particle, called the equivalent particle size. . According to different measurement methods, there are different equivalent particle sizes, such as:

1) Equivalent volume particle diameter: the diameter of a homogenous spherical particle having the same volume as the measured particle.

2) Equivalent settling velocity: the diameter of homogenous spherical particles having the same settling velocity as the measured particles. The particle size measured by gravity sedimentation method and centrifugal sedimentation method is equivalent sedimentation velocity, also called Stokes diameter.

3) Equivalent resistance particle diameter: the diameter of a homogenous spherical particle having the same electrical resistance as the measured particle under certain conditions. The particle size measured by the Coulter method is the equivalent resistance particle size.

4) Equivalent projected area particle size: the diameter of the spherical particles having the same projected area as the measured particles. The particle size measured by the image method is the equivalent projected area particle size.

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