采用粉末冶金法制备高温稀土永磁Sm(Co0.72Fe0.15Cu0.1Zr0.03)7.5,研究了烧结温度对磁体磁性能的影响.结果表明:烧结温度过低,则磁体的致密度较低,难以获得优良的磁性能;烧结温度过高,则Sm挥发,磁体的Sm含量降低,磁性能恶化.磁体的最佳烧结条件为:温度 1215℃,保温 45 min.在上述条件制备的磁体在25℃及500℃时的剩磁Br、内禀矫顽力Hci、最大磁能积(BH)max分别为:0.94 T,2276.6 kA/m,171.9 KJ/m3及0.67 T,509.4 kA/m,81.2 kJ/m3磁体的B-H退磁曲线在500℃时保持为直线,内禀矫顽力温度系数β(25℃～500℃)为-0.16%/℃,最高使用温度达到533℃.
参考文献
| [1] | Kim AS. .DESIGN OF HIGH TEMPERATURE PERMANENT MAGNETS[J].Journal of Applied Physics,1997(8 Pt.2b):5609-5611. |
| [2] | Ma B.M.;Liang Y.L. .The effect of Fe on the temperature dependent magnetic properties of Sm(Co,Fe,Cu,Zr)/sub z/ and SmCo/sub 5/ sintered magnets at 450/spl deg/C[J].IEEE Transactions on Magnetics,1996(5):4377-4379. |
| [3] | Liu S.;Hoffman E.P. .Application-oriented characterization of Sm/sub 2/(Co,Fe,Cu,Zr)/sub 17/ permanent magnets[J].IEEE Transactions on Magnetics,1996(5):5091-5093. |
| [4] | Liu J.F.;Ding Y.;Hadjipanayis G.C. .Effect of iron on the high temperature magnetic properties and microstructure of Sm(Co, Fe, Cu, Zr)_z permanent magnets[J].Journal of Applied Physics,1999(3):1670-0. |
| [5] | Lectard E;Allibert H;Ballou R .[J].Journal of Applied Physics,1994,75(10):6277. |
| [6] | Liu S;Yang J;Doyle G et al.[J].IEEE Transactions on Magnetics,1999,35(05):3325. |
| [7] | 郭朝晖,潘伟,李岫梅,胡新建,秦英,李卫.2∶17型Sm-Co高温永磁体的研究[J].稀有金属,2003(05):552-554. |
| [8] | Liu S;Kuhl G E .[J].Journal of Applied Physics,1999,35(05):3271. |
| [9] | 周寿增.稀土永磁材料及其应用[M].北京:冶金工业出版社,1995:158. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%