| 简介 |
PROBLEM TO BE SOLVED : To provide an inexpensive ferrite magnet that has excellent magnet characteristics even in a compositional region which is more excessive in Fe2O3than the stoichiometric composition. SOLUTION : In the ferrite magnet, the main phase of a magnetoplumbite type crystal structure expressed by the chemical formula of (A1-xRx)O-n[(Fe3+1-yFe2+y)2O3] occupies ≥80% in mole ratio. In the chemical formula, A denotes at least one kind of elements selected out of Ba and Sr and invariably contains Ba, and R denotes at least one kind of elements selected from among rare-earth elements. In addition, x, y, and n respectively denote mole ratios and adjusted to satisfy : 0COPYRIGHT : (C)2005, JPO&NCIPI |
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