Development of Zn-bonded Sm-Fe-N permanent magnet and magnetic powders with high magnetic coercivity
高矫顽力锌结合Sm-Fe-N永磁体及磁粉的研制
基本信息
- 批准号:06555200
- 负责人:
- 金额:$ 1.47万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:1994
- 资助国家:日本
- 起止时间:1994 至 1996
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
We have tried to establish permanent powders with high magnetic coercivity at high temperatures by using the Sm-Fe-N compound, which has high magnetic anisotropy and high Curie tepmperature. In particular, the present work is directed toward the development of the magnetic coercivity by coating the powders of Sm-Fe-N compound with zinc films, by using vapor deposition and electro-chemical deposition. We have obtained as follows.1.We have determined optical conditions of temperature, pressure and time to prepare the high-coercivity material by the plasma sintering method, by using starting materials of the Sm-Fe-N and zinc powders. As a result we obtained the maximum coercivity of 20kOe at 420゚C,5,000kg/cm^2, and for 5 min. The result shows that the plasma sintering is a powerful tool to establish high coercivity in a short time and at a low pressure, compared with ordinary sintering methods.2.We have carried out zinc-coating the Sm-Fe-N powders with an average sizes of 20mum (rough powders) and 3mum (fine powders), by using vapor deposition and electro-chemical deposition, and then sintered by the plasma sintering method. As a result we have obtained the improvement of the magnetic coercivity by zinc coating for the rough powders, but no improvement for the fine powders. It is concluded that the development of new methods of zinc coating is necessary.3.We have succeeded in high-resolution transmission electron microscopy observations of Sm-Fe-N powders including Mn, which are expected to be high coercivity of pinning-type, and found that the pinning of magnetic domain walls is produced by fine-grained crystals with about 10 nm in diameter.
我们试图用具有高磁各向异性和高居里温度的Sm-Fe-N化合物来制备高温高磁导率的永磁粉末。特别是,本工作是针对开发的磁性的Sm-Fe-N化合物粉末与锌膜,通过使用气相沉积和电化学沉积。1.以Sm-Fe-N和Zn粉为原料,确定了等离子烧结法制备高矫顽力材料的最佳温度、压力和时间条件。结果表明,在420 ℃、5, 000 kg/cm ^2、5 min条件下,等离子烧结获得了20 kOe的最大矫顽力。结果表明,等离子烧结是在短时间、低压力下获得高矫顽力的有力工具,2.对平均粒径为20 μ m的Sm-Fe-N粉末进行了镀锌处理(粗粉)和3 μ m(细粉),然后通过等离子烧结法烧结。结果表明,对粗粉进行镀锌可以提高磁粉的磁性,而对细粉则没有提高。3.对含Mn的Sm-Fe-N粉末进行了高分辨透射电镜观察,发现磁畴壁的钉扎是由直径约为10 nm的细晶粒晶体产生的。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
HIRAGA Kenji其他文献
HIRAGA Kenji的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('HIRAGA Kenji', 18)}}的其他基金
Study on mesoscopic physical phenomenon in many particle systems by electron holography
电子全息研究多粒子系统介观物理现象
- 批准号:
11440101 - 财政年份:1999
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Development of Diffraction Techniquesfor Studying Phase Transformation (Synchrotron Radiation and High-Resolution Electron Microscopy)
研究相变的衍射技术的发展(同步辐射和高分辨率电子显微镜)
- 批准号:
09242102 - 财政年份:1997
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
Structural Analysis on Quasicrystals and their Approximants.
准晶体及其近似物的结构分析。
- 批准号:
08404021 - 财政年份:1996
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Accurate crystal structure analysis by quantitative high-resolution electron microscopy
通过定量高分辨率电子显微镜进行精确的晶体结构分析
- 批准号:
05402048 - 财政年份:1993
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for General Scientific Research (A)
Low Temerature Electron Microscopy of High T_c Superconductors
高温超导体的低温电子显微镜
- 批准号:
63044008 - 财政年份:1988
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Overseas Scientific Survey.
Microstructure of Fe-Nd-B permanant magnet and magnetic coercivity
Fe-Nd-B永磁体的微观结构及矫顽力
- 批准号:
61460196 - 财政年份:1986
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
相似海外基金
Synthesis of high performance Sm-Fe-N magnetic powder by development of low-temperature reduction-diffusion technique using molten salt
熔盐低温还原扩散技术合成高性能Sm-Fe-N磁粉
- 批准号:
16K18230 - 财政年份:2016
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Young Scientists (B)
Online and Real-Time Measurement of Magnetic Powder Dosage in Magnetic Particles Inspection (MPI) of Materials
材料磁粉检测 (MPI) 中磁粉剂量的在线实时测量
- 批准号:
132248 - 财政年份:2016
- 资助金额:
$ 1.47万 - 项目类别:
Feasibility Studies
Consolidation by severe plastic deformation in compaction of magnetic powder cores and bonded magnets
磁粉芯和粘结磁体压制过程中通过严重塑性变形进行固结
- 批准号:
25820368 - 财政年份:2013
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Young Scientists (B)
Development of a motor with magnetic powder core that uses three-dimensional architecture efficiency
开发利用三维架构效率的磁粉芯电机
- 批准号:
19560281 - 财政年份:2007
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Making a Recycling Practicable for Cards Adhered of Magnetic Powder by Ingredient Separation.
通过成分分离使附着有磁粉的卡片的回收成为可能。
- 批准号:
12555286 - 财政年份:2000
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of Electro-Magnetic Powder Process
电磁粉末工艺的发展
- 批准号:
06453097 - 财政年份:1994
- 资助金额:
$ 1.47万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)