| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ferrite magnet exhibiting excellent magnet characteristics even in a composition region where Fe<SB>2</SB>O<SB>3</SB>is rich than in a stoichiometric composition, and to provide its manufacturing method. <P>SOLUTION: The ferrite magnet comprises a single phase of magneto-plumbite type crystal structure represented by a formula (A<SB>1-x</SB>R<SB>x</SB>)O-n[(Fe<SP>3+</SP><SB>1-y</SB>Mg<SP>2+</SP><SB>y</SB>)<SB>2</SB>O<SB>3</SB>]. In the formula, A is at least one kind being selected from Ba and Sr and including Ba inevitably, R is at least one kind being selected from rare earth elements, x, y and n represent mol ratios, respectively, in the range of 0<x≤0.6, 0<y≤0.05, and 6.0<n≤6.6. At the time of sintering, reducing atmosphere is controlled to produce the single phase of magneto-plumbite represented by the above-mentioned formula. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
