烧结钕铁硼饱和磁化行为研究

侯瑞芬; 张志高; 许志一; 董晖; 闫立钟; 杨天; 杨艺伟

doi:10.12338/j.issn.2096-9015.2020.9012

烧结钕铁硼饱和磁化行为研究

doi: 10.12338/j.issn.2096-9015.2020.9012

侯瑞芬^1,,
张志高^1, ,,
许志一^{2, 3},
董晖⁴,
闫立钟⁴,
杨天¹,
杨艺伟¹

1.
中国计量科学研究院，北京 100029
2.
中国科学院赣江创新研究院，赣州 341000
3.
中国科学院物理研究所，北京 100190
4.
中国计量技术开发总公司，北京 100029

基金项目: 中国计量科学研究院基本科研业务费（AKY1802）

详细信息

作者简介:
侯瑞芬（1974-），中国计量科学研究院高级工程师，研究方向：磁性测量，邮箱：hourf@nim.ac.cn

通讯作者:
张志高（1971-），中国计量科学研究院副研究员，研究方向：磁性测量，邮箱：zzg@nim.ac.cn

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出版历程
- 网络出版日期: 2021-06-07
- 刊出日期: 2021-06-24

Study on Saturation Magnetization Behavior of Sintered NdFeB

HOU Ruifen^1
,,
ZHANG Zhigao^{1
, ,},
XU Zhiyi^{2, 3},
DONG Hui⁴,
YAN Lizhong⁴,
YANG Tian¹,
YANG Yiwei¹

1.
National Institute of Metrology, Beijing 100029, China
2.
Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
3.
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
4.
China National Metrology Technology Development Co., Beijing 100029, China

摘要

摘要: 为了明确烧结钕铁硼磁体在磁中性和具有磁化历史状态下所需最低饱和磁化场强度与其内秉矫顽力或饱和磁极化强度的关系，选取了三种烧结钕铁硼磁体，在磁中性和有磁化历史两种初始状态下，分别在不同大小的磁场强度下对磁体进行充磁，得出了开磁路下的磁偶极矩和闭磁路下的退磁曲线。结果表明：对于磁中性状态磁体，只需要H_s=2J_s/μ₀的磁化场就可以将磁体饱和磁化；对于有磁化历史的磁体，则需要H_s=3J_s/μ₀的磁化场才能实现饱和磁化。
- 烧结钕铁硼 /
- 永磁体 /
- 退磁曲线 /
- 磁极化强度 /
- 饱和磁化
Abstract: To clarify the relationship between the minimum saturation magnetization field strength required for sintered NdFeB magnets and their intrinsic coercivity or saturation polarization in the initial state of magnetic neutrality and magnetized history, three different grades of sintered NdFeB magnets were selected in different initial states. The magnetic dipole moments and the demagnetization curves were measured after magnetizing under different magnetic field strengths. The results show that for sintered NdFeB magnets, only a magnetization field of H_s=2J_s/μ₀ is required to saturate the magnets in the state of magnetic neutrality. For magnets with magnetized history, a magnetization field of H_s=3J_s/μ₀ is required to realize saturation magnetization.
- sintered NdFeB /
- permanent magnet /
- demagnetization curves /
- polarization strength /
- saturation magnetization

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图 1 起始磁中性态样品的磁特性参数变化率曲线

Figure 1. Change rate curve of magnetic characteristic parameters of samples in the initial state of magnetic neutrality

下载: 全尺寸图片幻灯片

图 2 有磁化历史样品的磁特性参数变化率曲线

Figure 2. Change rate curve of magnetic characteristic parameters of samples in the state of magnetized history

下载: 全尺寸图片幻灯片

表 1 起始磁中性态不同样品的H_s、J_s、H_cJ关系

Table 1. The relationship of H_s、J_s、H_cJ between the different samples in the initial state of magnetic neutrality

牌号 H_s (kA/m) H_s/(J_s/μ₀) H_cJ (kA/m) H_s/H_cJ

N52 1727 1.5 1032 1.7
N42SH 1584 1.5 1630 1.0
N44EH 2148 2.0 2435 0.9

下载: 导出CSV

表 2 有磁化历史不同样品的H_s、J_s、H_cJ关系

Table 2. The relationship of H_s、J_s、H_cJ between the different samples in the state of magnetized history

牌号 H_s (kA/m) H_s/(J_s/μ₀) H_cJ (kA/m) H_s/H_cJ

N52 2300 2.0 1032 2.2
N42SH 2642 2.5 1630 1.6
N44EH 3215 3.0 2435 1.3

下载: 导出CSV

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