Measurement of the magnetic properties of metal dusts and fumes

An instrument for measuring the specific remanent moment and the pulse coercive force of ferro/ferrimagnetic dust samples has been constructed using a commercial fluxgate magnetometer as a detector. The minimum amount of dust needed for successful measurements is about 1 mg to match the amount of du...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1982-03, Vol.18 (2), p.788-791
Main Authors: Moilanen, M., Kalliomaki, K., Kalliomaki, P., Aittoniemi, K.
Format: Article
Language:English
Subjects:
Coercive force
Detectors
Ferrimagnetic materials
Force measurement
Instruments
Magnetic properties
Magnetometers
Measurement standards
Pollution measurement
Pulse measurements
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Description
Summary:An instrument for measuring the specific remanent moment and the pulse coercive force of ferro/ferrimagnetic dust samples has been constructed using a commercial fluxgate magnetometer as a detector. The minimum amount of dust needed for successful measurements is about 1 mg to match the amount of dust collected when using standard air sampling methods. An output noise of 14 PT rms (smooth RC = 48 s) for the instrument has been achieved in a normal unshielded laboratory room. Examples of the magnetic properties of dust samples from different work environments are given for the calibration of the in vivo measurement of lung-retained magnetic contaminants.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1982.1061822