磁性液体场致热效应及其机制分析  

Thermal Effect and Mechanism Analysis of the Magnetic Fluid under the Magnetic Field

作　　者：李玉彬[1] 惠兆春 楚明华 王宇伟[1] 刘志升[1] 李学慧[1] 

机构地区：[1]大连大学物理科学与技术学院磁性液体研发工作室,辽宁大连116622

出　　处：《微纳电子技术》2014年第7期425-428,474,共5页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(51077006);2013年本科生创新教育基金国家级立项资助项目(201311258007)

摘　　要：根据磁性液体特殊的结构组成及磁场中所呈现的奇异特性,利用自行搭建的场致热效应实验装置,通过控制电流换向器,磁场迅速左右换向,致使磁性液体中磁性颗粒磁矩的取向迅速改变,并通过调节直流电源输入电压,控制磁场强度,使磁性液体处于不同强度的换向磁场下,由此探索磁性液体场致热效应规律及分析机制。实验结果表明,处于变化磁场中的磁性液体具有热效应,其温度将随时间的推移而升高,其升温速率与磁场强度及磁极换向频率呈正相关。这将提供一种特殊磁场下诱导磁性液体实现"肿瘤热疗"的新方法。According to the special structure composition of the magnetic fluid and the singularcharacteristics in the magnetic field, the magnetic field could be quickly commutated between leftand right by the self-built experimental platform of the field thermal effect and controlling currentcommutator, so that the orientation of the magnetic moment for the magnetic particle in the mag-netic fluid would be changed as well. The magnetic fluid was in the commutating magnetic fieldswith different intensities by regulating the input voltages of the DC power supply and controllingthe magnetic field intensity, thus the rule of the field thermal effect for the magnetic fluid was ex-plored and the mechanism was analyzed. The experimental result shows that the magnetic fluidhas thermal effect in the varietal magnetic field, the temperature of the magnetic fluid will increa-ses with the time and its temperature increase rate has positive relativity to the magnetic field in-tensity and commutating-field frequency. A new method will be provided that the tumor hyper-thermia is realized by inducing the magnetic fluid under the special magnetic field.

关 键 词：磁性液体 热效应 磁场 温度 肿瘤热疗 

分 类 号：TB383[一般工业技术—材料科学与工程]