Physical meaning and use in risk assessment of powder resistivity
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Solids Handling Safety
# Dust explosion physical properties # MIT - Minimum Ignition Temperature of dust
1. Definition of powder resistivity
As every materials, powders will conduct electricity to a certain degree. During processing, the movement of the particles during for example pneumatic transport or gravity chute will create electrostatic charges on the particles. How well the dust will be able to release those charges will depend on its resistivity.
The resistivity is defined in Ω.m as the ratio of an
electric potential across a dust layer to the induced
current density [Mastropietro]. The higher the
potential to get a certain current, the higher the
resistivity will be.
determination of powder resistivity
|Material||Resistivity in Ω.cm|
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