1997 Fiscal Year Final Research Report Summary
Fabrication of Amorphous Powder Perticles by Spinning Water Atomization Process (SWAP), and Development of Compressed Powder Magnetic Cores
| Project/Area Number |
08555080
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Electronic materials/Electric materials
|
|---|
| Research Institution | Kumamoto Institute of Technology |
|---|
Principal Investigator |
YAGI Masaaki Kumamoto Institute of Technology, Faculty of Engng., Prof., 工学部, 教授 (80005371)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ENDO Isao Kubota CO., Tech.Development Lab., Engng.Material Dept., Manager, 技術開発研究所, 部長
MUNAKATA Makoto Kumamoto Institute of Technology, Faculty of Engng., Associate Prof., 工学部, 助教授 (10183112)
|
|---|
| Project Period (FY) |
1996 – 1997
|
| Keywords | amorphous / Fe-based alloys / powder particles / commpressed powder core / soft magnetic properties / high-frequency core |
|---|
| Research Abstract |
Fe-based amorphous powder particles were fabricated by the spinning water atomization process (SWAP), recently developed by the authors. The powders obtained exhibited good soft-magnetic properties up to particle sizes of about 200-300mum. These amorphous particles were insulated by glass fine powder and pressed into toroidal and E shape cores by hot-pressing techniques at relatively high temperature conditions below crystallization temperature. The mass densities of the pressed cores were about 80-85%. The magnetic properties of toroidal samples 20-30 mm in diameter were measured after annealing. For the core pressed at 1.5GPa, 450-480ﾟC,the initial permeability was about 100 in the frequency range up to 1 MHz for H_m=5mOe, which were comparable to those of commercial Sendust compressed cores and Fe-based gapped amorphous ribbon cores for application to fly-back transformers or choking coils operating at frequencies above 100kHz. The core losses at 100kHz were 6-7 [J/m^3] (=0.6-0.7 [W/cc] ) for B_m=0.1T.These values were 50-70% of those of above commercial cores.
|
