Determination of maximum particle size in magnetic fluids

被引：3
|
作者：
Aref'ev, I. M. [1 ]
Lebedev, A. V. [2 ]
机构：
[1] Ivanov State Power Engn Univ, Ul Rabfakovskaya 34, Ivanovo 153003, Russia
[2] Russian Acad Sci, Ural Branch, Inst Mech Continua, Ul Koroleva 1, Perm 614014, Russia
来源：
COLLOID JOURNAL | 2016年 / 78卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
CONCENTRATED FERROCOLLOIDS;
D O I：
10.1134/S1061933X16020022
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Higher-order moments of particle size distribution functions are determined for magnetic fluids from analysis of initial segments of magnetization curves. It is shown that the higher-order moments calculated using approximation of real particle size distributions by the I" distribution are strongly overestimated. Agreement between the measured and calculated moments can be radically improved by truncating maximum particle size X (max). A relation between X (max) and the parameters of the I" distribution is proposed taking into account the degree of polydispersity of a magnetic fluid. Namely, the ratio between the maximum and most probable particle diameters is equal to the ratio between the mean-square magnetic moment of a particle and its squared average magnetic moment.
引用
收藏
页码：269 / 272
页数：4
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