MAGNETIC SUBSTANCE AND METHOD OF ITS MANUFACTURE

摘要

The substance has a small dimensional change after burning, and does not deteriorate in its magnetic properties. The magnetic substance consists of ferrite grains (1) formed by burning powdery ferrite material, and contraction preventive grains (2) mixed in the ferrite grains (1) sintered and bonded to the ferrite grains (1) in contact with the contraction preventive grains in burning, and turned into ferrite by oxidation.