专题:热管理技术及应用

钕铁硼热籽在磁感应热疗交变磁场中磁损耗功率的实验与模拟

  • 李静 ,
  • 施柏源 ,
  • 林梓昕 ,
  • 徐苏华
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  • 1. 华南理工大学化学与化工学院, 广州 510610;
    2. 华南理工大学珠海现代产业创新研究院, 珠海 519110;
    3. 广东省生物医学传热工程技术研究中心, 佛山 528051;
    4. 广东省医疗器械质量监督检验所国家药监局体外循环器械重点实验室, 广州 510145
李静,教授,研究方向为生物医学传热,电子信箱:ljing@scut.edu.cn;徐苏华(通信作者),高级工程师,研究方向为医疗器械新技术,电子信箱:541153861@qq.com

收稿日期: 2023-07-28

  修回日期: 2023-12-14

  网络出版日期: 2025-01-15

基金资助

珠海市产学研合作及基础与应用基础研究项目(ZH22017003210078PWC)

Magnetic power loss of NdFeB thermoseeds in alternating magnetic field for magnetic induction hyperthermia

  • LI Jing ,
  • SHI Baiyuan ,
  • LIN Zixin ,
  • XU Suhua
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  • 1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510610, China;
    2. Zhuhai Institute of Modern Industrial Innovation, South China University of Technology, Zhuhai 519110, China;
    3. The Guangdong Provincial Engineering Research Center of Biomedical Heat Transfer, Foshan 528051, China;
    4. National Medical Products Administration Key Laboratory for Extracorporeal Circulation Devices, Guangdong Medical Devices Quality Surveillance and Test Institute, Guangzhou 510145, China

Received date: 2023-07-28

  Revised date: 2023-12-14

  Online published: 2025-01-15

摘要

采用实验与模拟结合的方法对钕铁硼磁性材料进行了磁损耗产热功率的计算,结果表明,钕铁硼热籽在磁场频率21~29 kHz,磁感应强度2.7~3.7 mT下具有较高的产热功率,热体积功率密度在给定磁场条件下处于2.39×106~5.54×106 W/m3,并将此结果应用于磁感应热疗模拟。模拟结果显示,单个钕铁硼热籽的有效热疗边界呈椭球形,在给定磁场条件最大有效热疗范围为短半轴12.9 mm、长半轴17.6 mm,表明钕铁硼热籽可在较低的磁场频率和磁感应强度下达到热疗所需的产热功率。

本文引用格式

李静 , 施柏源 , 林梓昕 , 徐苏华 . 钕铁硼热籽在磁感应热疗交变磁场中磁损耗功率的实验与模拟[J]. 科技导报, 2024 , 42(24) : 79 -87 . DOI: 10.3981/j.issn.1000-7857.2023.07.01151

Abstract

In this article, the magnetic power loss of NdFeB magnetic material was calculated by combining experiment and simulation. The results showed that the magnetic power loss of NdFeB thermoseed in the magnetic field with frequency of 21~29 kHz and magnetic induction intensity of 2.7~3.7 mT was higher, and the thermal volumetric power density was in the range of 2.39×106 W/m3~5.54×106 W/m3 under the given magnetic field condition. The results were applied to the simulation of magnetic induction hyperthermia. The simulation results showed that the effective hyperthermia boundary of a single NdFeb thermoseed was ellipsoidal, with the short half-axis of 12.9 mm of and the long half-axis of 17.6 mm for the maximum effective hyperthermia range under the given magnetic field condition, indicating that NdFeB thermoseed could reach the heat generation power required for hyperthermia under low magnetic field frequency and magnetic induction intensity, which provided data support for the application of NdFeB material in magnetic hyperthermia.

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