Hyperthermic Effects of FeCoNi-Coated Glass Fibers in Alternating Magnetic Field

Abstract

FeCoNi-coated glass fibers were synthesized using the electroless plating method, and the hyperthermic effects of FeCoNi-coated glass fibers in alternating magnetic fields were evaluated. The thickness of the coated FeCoNi was approximately $1.1~\mu \text{m}$ on glass fibers with a diameter of approximately 15– $17~\mu \text{m}$ . The saturation magnetization was approximately 150 emu/g. The heat elevations of FeCoNi-coated glass fibers were measured with the increasing number of fibers (4, 8, 12, 16, and 20 pieces of fibers) in silicon oil under an alternating magnetic field (AMF) at different intensities and frequencies. The elevated equilibrium temperatures linearly increased from 34.3 °C to 55.9 °C with an increasing number of FeCoNi-coated glass fibers from 4 to 20 pieces under an AMF of 105 Oe and 250 kHz. The specific loss power (SLP) was approximately 30 W/g. The heat behavior was examined as a function of the AMF and frequency. The AMF intensity was changed 60, 75, 90, and 105 Oe at 250 kHz, and the AMF frequency was changed 169, 213, 250, and 291 kHz at 105 Oe. The elevated equilibrium temperatures of 20 pieces of fibers increased from 46.8 °C to 56 °C and 46.7 °C to 61 °C with the increasing AMF intensity and frequency, respectively. The SLP also increased from 12.8 to 36.5 W/g.