| 简介 |
PROBLEM TO BE SOLVED : To provide an R-T-B based sintered magnet which has high Hand high H/H, while reducing the content of RH.SOLUTION : An R-T-B based sintered magnet contains R (R is at least one of rare earth elements, and necessarily includes Nd. R may contain at least one selected from among Dy, Tb, Gd and Ho with a content of less than 2 mass%) : 32.0-34.0 mass%, B : 0.90-0.98 mass%, Ga : 0.60-1.10 mass%, Cu : 0.20-0.35 mass%, Ti : 0.15-0.28 mass%, and Al : 0.05-0.50 mass%, with the remainder T (T is Fe or Fe and Co) and unavoidable impurities, and has a composition that satisfies the following formula (1). 0.06≤[(Fe/Fe)+(Co/Co)+(Al/Al)]-14×[(B/B)-2×(Ti/Ti)] (1)SELECTED DRAWING : Figure 1 |
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