| Project/Area Number |
23656420
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Structural/Functional materials
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
SUGIMOTO Satoshi 東北大学, 工学(系)研究科(研究院), 教授 (10171175)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
|
|---|
| Keywords | ナノ粒子 / 鉄ーコバルト / サマリウムコバルト / ナノコンポジット磁石 / 水素プラズマ金属反応法 / 水素還元 / 溶融塩 / 高速ボールミル / 鉄-コバルト / 保磁力 / 水素アークプラズマ反応法 / 耐熱性 / ナノ結晶フレーク / ナノコンポジット / 高エネルギーボールミル / 界面活性剤 |
|---|
| Research Abstract |
The purpose of this study was the preparation of Fe-Co and Sm-Co nanoparticles by hydrogen plasma-metal reaction method, hydrogen reduction of molten salt and high energy ball milling for the use of nanocomposite magnets which show higher magnetic properties than Nd-Fe-B magnets. The magnetic properties of these nanoparicles are also investigated. As a result, the hydrogen plasma-metal reaction method could fabricate Fe-Co nanoparticles with an average diameter below 82 nm. The saturation magnetization of 220-232 Am2kg-1 were obtained, which was higher than the values reported in previous studies. By using hydrogen plasma-metal reaction method, Sm-Co nanoparticles with the size of 48-63 nm were obtained. The nanoparticles showed coercivities of 0.65-1.03 MAm-1, which is the highest value among Sm-Co particles with the particle size of below 82 nm.
|
