Induction Heating of Magnetic Fluids for Hyperthermia Treatment

• Published in: IEEE transactions on magnetics Vol. 46; no. 4; pp. 1043 - 1051
• Main Authors: Wang, Xufei, Tang, Jintian, Shi, Liqun
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.04.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Alloys; Cross-disciplinary physics: materials science; rheology; Demagnetization; Demagnetizing; Exact sciences and technology; Finite element analysis; Frequency; Heat treatment; Heating; Hyperthermia; Induction heating; Liquids; Magnetic analysis; Magnetic cores; Magnetic fields; Magnetic fluids; Magnetic liquids; magnetic losses; Magnetic materials; Magnetism; Material properties; Materials science; Mathematical analysis; Mathematical models; Other topics in materials science; Physics; Studies; superparamagnetic particles; Iron loss; magnetic losses; superparamagnetic particles; magnetic liquids; Hyperthermia; Magnetic fluids; Induction heating; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2009.2038272

The induction heating of magnetic fluids for magnetic induction hyperthermia treatments is theoretically analyzed, with regard to the influences by magnetic field parameters, material properties, and demagnetizing field effects in finite-size samples. A monodispersion model of noninteracting superparamagnetic particles, subjected to a magnetic field of the intensity h ex < 16 kAm -1 and frequency f < 1 MHz, is used for the analysis. Calculation results show that the induction heating has a quasi-linear dependence on field intensity and a quasi-negative exponential dependence on field frequency. As for the influences by material parameters, respectively, the induction heating has a double-exponential-like dependence on the magnetic core size and a negative dependence on the coating layer thickness of the superparamagnetic particles. Similarly, the heating dependence on the carrier liquid viscosity is also a double-exponential-like relationship. Besides, the induction heating has a linear dependence on the volume fraction of the superparamagnetic particles, and a negative dependence on the demagnetizing factors, which are related to the sample shapes and orientations. Initial experiments are performed for validating the analytical calculation results.