A dispersion technique for measuring the bulk magnetic characteristics of magnetic particulate materials

A dispersion technique is shown which prepares powdered (particulate) materials for measurement in a 60-Hz hysteresis loop tracer ( meter). The material is proportioned and wet out with linseed oil in a Hoover Automatic Muller, packed in a glass tube, and weighed. The space gradient of an ac magnetic field is used to orient the sample to a high squareness ratio. The only two physical measurements which need be made are the weight and the length of the mixture in the tube. The tube cross section need not be determined. The absolute intrinsic flux density of the material can then be calculated, using the flux determination from the hysteresis loop tracer. If the tube cross section is determined, the apparent flux density can be calculated.