MAGNETIC OXIDE MATERIAL AND METHOD OF ITS MANUFACTURE.

摘要

Mixed particles are produced by mixing hematite, magnetite, or a mixture thereof with one of magnetization control (adjustment) materials, Ca, Ti, Sn, Si, and Mg, in a given range of 0.20 to 76.0 wt.%. To the mixed particles, 0.1 to 4.0 wt.% fluid or granular substance having a single bond or a double bond of carbon atoms is added, and mixed uniformly. The mixture is then burnt in an inert gas at a temperature of 550 to 1,500 DEG C. <IMAGE>