Colloidal stability of Mn _{1− x} Zn _x Fe ₂ O ₄ nanoparticles in transformer oil: role of Zn substitution

Abstract

Colloidal stability of magnetic fluids with desirable magnetic properties plays an important role in cooling applications in power transformers. Colloidal stability largely depends on nanoparticles' characteristics and quality of their dispersion in transformer oil. In this work, a detailed discussion on the development of synthesis protocols for Mn 1−x Zn x Fe 2 O 4 (MZ) fluids is described. The effect of degree of Zn-ion substitution under an optimised condition of MZ nanoparticles on the dispersion quality of MZ fluids and their magnetic properties are investigated in this work.