The size induced effect on rheological properties of Co-ferrite based ferrofluid

被引：43

作者：

Chand, Mahesh ^{[1
]}

Kumar, Sandeep ^{[1
]}

Shankar, Ajay ^{[1
]}

Porwal, Rajni ^{[1
]}

Pant, R. P. ^{[1
]}

机构：

[1] Natl Phys Lab, EPR Sect, New Delhi 110012, India

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2013年 / 361卷

关键词：

cobalt ferrite; magnetic materials; nanoparticles; ferrofluid; rheology; MAGNETIC-PROPERTIES; PARTICLE-SIZE; FABRICATION; PH;

D O I：

10.1016/j.jnoncrysol.2012.10.003

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Finite size effect on structural, magnetic and rheological properties of Co-ferrite based ferrofluids has been investigated in detail. The shape and size distribution has been confirmed by transmission electron microscopy. The average particle size varies in the range 8 nm <= x <= 34 nm. The size induced rheological studies of ferrofluid with varying magnetic field and shear rate gives an insight to the work. The large size particles show less viscosity as compared to small size particles. Using H-B model, particle size dependent interaction with flow properties has been established. In addition, time dependent formation and destruction of magnetically induced structures has been described. The result of our investigations shows that the rheological measurements are in accordance with structural and magnetic properties of the ferrofluids. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：38 / 42

页数：5

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[1] Sacrificial Template-Directed Fabrication of Superparamagnetic Polymer Microcontainers for pH-Activated Controlled Release of Daunorubicin [J].