Nano Express

Nanoscale Research Letters

, Volume 2, Issue 3, pp 155-160

Open Access This content is freely available online to anyone, anywhere at any time.

Initial susceptibility and viscosity properties of low concentration ε-Fe3 N based magnetic fluid

  • Wei HuangAffiliated withDepartment of Functional Material Research, Central Iron & Steel Research Institute Email author 
  • , Jianmin WuAffiliated withDepartment of Functional Material Research, Central Iron & Steel Research Institute
  • , Wei GuoAffiliated withDepartment of Functional Material Research, Central Iron & Steel Research Institute
  • , Rong LiAffiliated withDepartment of Functional Material Research, Central Iron & Steel Research Institute
  • , Liya CuiAffiliated withDepartment of Functional Material Research, Central Iron & Steel Research Institute

Abstract

In this paper, the initial susceptibility of ε-Fe3N magnetic fluid at volume concentrations in the range Φ = 0.0 ∼ 0.0446 are measured. Compared with the experimental initial susceptibility, the Langevin, Weiss and Onsager susceptibility were calculated using the data obtained from the low concentration ε-Fe3N magnetic fluid samples. The viscosity of the ε-Fe3N magnetic fluid at the same concentrations is measured. The result shows that, the initial susceptibility of the low concentration ε-Fe3N magnetic fluid is proportional to the concentration. A linear relationship between relative viscosity and the volume fraction is observed when the concentration Φ < 0.02.

Keywords

Magnetic fluid Nano-material Initial susceptibility Viscosity