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磁性流体薄膜在磁场中产生光的双折射效应的机理
引用本文:王正良.磁性流体薄膜在磁场中产生光的双折射效应的机理[J].兵工学报,2004,25(3):300-303.
作者姓名:王正良
作者单位:浙江万里学院物理技术与材料研究所,浙江宁波,315101
基金项目:浙江省自然科学基金,浙江省宁波市科技攻关项目
摘    要:本文对磁性流体薄膜在磁场中产生光的双折射效应的机理进行了实验观察和计算分析,发现磁性流体是一种特殊的方向性弱絮凝的胶体.弱絮凝是胶体到絮凝状态的一种临界状态,在一般胶体系统中弱絮凝行为表现不明显,作用和意义都不大.但磁性流体在磁场中的弱絮凝行为表现异常明显,既显示出特有的方向性,又不使胶体系统失稳,合乎磁性流体薄膜在磁场中产生光的双折射效应的事实,从而揭示了方向性弱絮凝使磁性流体薄膜在磁场中产生光的双折射效应的机理,为磁性流体光学器件的研制提供了设计依据.

关 键 词:物理化学  磁性流体  方向性弱絮凝  双折射效应  机理

MECHANISM OF OPTICAL BIREFRINGENCE EFFECT ON A THIN FILM MAGNETIC FLUID SITUATED IN A MAGNETIC FIELD
Wang Zhengliang.MECHANISM OF OPTICAL BIREFRINGENCE EFFECT ON A THIN FILM MAGNETIC FLUID SITUATED IN A MAGNETIC FIELD[J].Acta Armamentarii,2004,25(3):300-303.
Authors:Wang Zhengliang
Abstract:This paper analyses the mechanism how a thin film magnetic fluid shows optical birefringence in a magnetic field. A magnetic fluid is found to be a directional colloid with weak flocculation, i.e. a fluid in a critical state from the colloidal state to that of flocculation. Once in a magnetic field a magnetic fluid with weak flocculation has its own particular direction, where the colloid system does not lose its stability. Thus the thin film magnetic fluid shows optical birefringence in a magnetic field revealing the mechanism that directional weak flocculation of the magnetic fluid causes optical birefringence in a magnetic field.This will provide design foundations for further research of optical instruments based on magnetic fluid.
Keywords:physical chemistry  magnetic fluid  directional weak flocculation  birefringence effect  mechanism
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