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Journal of Materials Science

, Volume 40, Issue 1, pp 135–138 | Cite as

Selection of ferrite powder for thermal coagulation therapy with alternating magnetic field

  • T. MaeharaEmail author
  • K. Konishi
  • T. Kamimori
  • H. Aono
  • H. Hirazawa
  • T. Naohara
  • S. Nomura
  • H. Kikkawa
  • Y. Watanabe
  • K. Kawachi
Article

Abstract

Selection of ferrite powder was carried out to realize a thermal coagulation technique in which tumors are locally heated by an application of alternating magnetic field from external coils. Magnesium ferrite (MgFe2O4) showed the largest increase in temperature (ΔT) under an alternating magnetic field in all the ferrites examined. For all the samples, ΔT value under alternating magnetic field was increased with an increase in frequency (200–500 kHz). The heating ability for the Mg-ferrite was ca. 1.4 W/g under alternating magnetic field of 4.0 kA/m (200 W, 370 kHz). The heating ability in alternating magnetic field was clearly depended on the magnitude of the hysteresis loss for the ferrite powder.

Keywords

Polymer Magnetic Field Magnesium Ferrite Hysteresis Loss 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • T. Maehara
    • 1
    Email author
  • K. Konishi
    • 1
  • T. Kamimori
    • 1
  • H. Aono
    • 2
  • H. Hirazawa
    • 2
  • T. Naohara
    • 2
  • S. Nomura
    • 3
  • H. Kikkawa
    • 4
  • Y. Watanabe
    • 4
  • K. Kawachi
    • 4
  1. 1.Department of Physics, Faculty of ScienceEhime UniversityJapan
  2. 2.Department of Materials Science and Engineering, Faculty of EngineeringEhime UniversityJapan
  3. 3.Department of Mechanical Engineering, Faculty of EngineeringEhime UniversityJapan
  4. 4.Department of Surgery IIEhime UniversityJapan

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