磁场下氮化铁磁性液体的表观密度研究  

Apparent Density of Nitride Iron Magnetic Fluid under Magnetic Field

作　　者：齐锐[1] 朱建强[2] 徐晓璐[3] 刘万里[3] 张炯[2] 李学慧[2] 

机构地区：[1]大连理工大学化工学院,辽宁大连116023 [2]大连大学物理科学与技术学院,辽宁大连116622 [3]大连大学环境与化学工程学院,辽宁大连116622

出　　处：《稀有金属》2007年第5期627-630,共4页Chinese Journal of Rare Metals

基　　金：国家自然科学基金资助(50677005)项目

摘　　要：根据Bernoulli方程研究氮化铁磁性液体的表观密度,将磁性液体置于由FD-FM-A磁天平的两个励磁线圈产生的磁场下进行实验研究。在不同的磁场强度下,利用流体静力称衡法,用电子分析天平测量沉浸在磁性液体中测锤的质量,计算出不同高度下磁性液体的表观密度,来研究磁性粒子分布规律。实验结果表明:只有外磁场H具有梯度时,磁场才对氮化铁磁性液体中粒子的重新排布有贡献;Bernoulli方程中关于磁性液体的修正项μ0∫H0MdH是合理的,否则密度将会出现负值。Based on the Bernoulli equation, the distilbution of nano-particles of nitilde iron magnetic fluid under the horizontal magnetic fields was investigated. The horizontal magnetic field was produced by two excitation coils. Under different intensities of magnetic field, the distribution pattern was obtained by using hydrostatic measurement in the magnetic fluid. The experimental result was as follows： only when the ap-plied magnetic field had gradient, the magnetic field had contribution to the distribution of the nano-particles of the nitride iron magnetic fluid. If the distribution of the magnetic field was uniform along z axis, the corrective term ,μ0∫0^hMdH to the nitride iron magnetic fluid was necessary in Bernoulli equation to avoid unreasonable value.

关 键 词：氮化铁磁性液体 表观密度 分布曲线 BERNOULLI方程 

分 类 号：O646.58[理学—物理化学] O657.2[理学—化学]