- Sendust by Great Soviet Encyclopedia
... the base material from which magnetodielectrics are pressed. The magnetodielectrics are used in radio engineering and communications technology as cores for transformers and choke coils of high stability. In cast form, Sendust is used in the manufacture of pole pieces for tape recorders.
- Magnetite by Great Soviet Encyclopedia
... -16 kA/m (150-200 oersteds)]. Magnetodielectrics are manufactured from these powders. At temperatures above 550-600°C (above the Curie point), magnetite becomes paramagnetic. Magnetite has a melting point of 1591-1597°C. Oxidation of magnetite leads to hematite (martite); muschketowite is the pseudomorph of magnetite after crystalline hematite. Varieties of magnetite are ...
- Magnetic Materials by Great Soviet Encyclopedia
... materials, and magnetodielectrics.The quality of magnetic materials is continually being improved by using increasingly pure raw materials (charge materials) and by perfecting production processes (for example, heat-treating the materials in a protective medium and vacuum melting). Improvements in the crystalline and magnetic texture of magnetic materials make ...
- Soft-Magnetic Materials by Great Soviet Encyclopedia
... such soft-magnetic materials. Magnetodielectrics, which are fine powders of carbonyl iron, Permalloy, or Alsifer mixed with a dielectric bonding material, are used in the frequency range 10 4-10 8 Hz.Mixed ferrites (for example, a compound consisting of zinc and nickel ferrites) and ferrite-garnets, whose crystal structure is identical with natural garnets, are used ...
- Sintered Material by Great Soviet Encyclopedia
... important composite, namely, magnetodielectrics, which were based on ferromagnetic metal powders dispersed in a dielectric binder. The development of sintered hard alloys in the 1920’s by K. Schroter in Germany was a significant technological advance. Contacts for the electrical industry made from pseudoalloys and composites of sintered materials (tungsten-copper, silver ...