Compressed Powdered Permalloy Manufacture and Magnetic Properties

The paper gives a brief description of the manufacture of magnetic cores of compressed permalloy powder followed by information covering their magnetic properties with particular reference to their, use in loading coils. Production of the powder, and its insulation, pressing, and annealing are discussed. Under magnetic properties, permeability, core loss, and modulation are treated. Curves are given illustrating the characteristics of interest in connection, with the design and application of loading coils; and comparisons to corresponding characteristics of compressed powdered iron are made throughout.