|
|||||
|
|
Heat generation ability in AC magnetic field and their computer simulation for Ti tube filled with ferrite powder |
|
| Authors: | Hiromichi Aono Takashi NaoharaTsunehiro Maehara Hideyuki HirazawaShinya Matsutomo Yuji Watanabe |
| Institution: | a Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan b Department of Environmental Materials Engineering, Niihama National College of Technology, Niihama 792-8580, Japan c Department of Electronic Control Engineering, Niihama National College of Technology, Niihama 792-8580, Japan d Department of Organ Regenerative Surgery, Ehime University Graduate School of Medicine, Toon 791-0295, Japan |
| Abstract: | The heat generation ability of needle-type materials was studied for the application of thermal coagulation therapy in an AC magnetic field. Although the Ti tube without the MgFe2O4 powder or Ti rod showed poor heat generation abilities in an AC magnetic field, the temperature was significantly increased by the presence of ferrite powder in the Ti tube. We confirmed using a computer simulation that the eddy loss of the Ti tube was increased by the enhanced magnetic flux density due to the ferrite powder in the Ti tube. The heat generation of the ferrite filled Ti tube was increased by utilization of the quenched MgFe2O4 powder from elevated temperature. The relative magnetic permeability of the quenched ferrite was enhanced with the decrease in the inverse ratio of the cubic spinel structure. The heat generation ability was increased with the increase in the relative magnetic permeability of the Ti tube with ferrite powder. The calculated joule loss based on the experimental results showed an agreement with those using the computer simulation. |
| Keywords: | Ti needle Thermal coagulation therapy MgFe2O4 ferrite AC magnetic field Computer simulation |
| 本文献已被 ScienceDirect 等数据库收录！ | |