Abstract
This article studies the main physical and chemical properties of magnetic clays. Structural changes in magnetic clay composite suspensions were evaluated by measuring the permittivity through direct measurement of the sensor capacitance and through computer measurement of the frequency of the electric signal inversely proportional to the sensor capacitance. Natural bentonite clay of the Tagan field (East Kazakhstan region) was used in this study. Magnetite synthesized by the method of co-precipitation of iron salts with magnetite-clay composites. Different compositions of clay-magnetite compounds were investigated to study the magnetic properties of the samples. According to the study, with the increasing of magnetite in the composition the magnetic properties increase. However, increasing the magnetite in the composition leads to lose the stability of the suspension. The stability of the suspension also investigated by measuring of the size of the particles. Depending on the findings of the study 20% magnetite-clay composition was the optimal value for the magnetic solution.
Highlights
Nowadays, the study of water-based magnetic fluids is one of the interesting topics on the scientific field
Their properties are determined by a set of characteristics of its constituent components, varying which, within a wide range, the physicochemical parameters of magnetic fluids (MF) can be changed depending on the conditions of their application
A list of many of these characteristics was given in a number of works [ 2-3], the main colloidal-chemical property that determines the conditions for using MF as intended is the aggregative stability of this colloidal system in combination with a high dispersion of the magnetic phase
Summary
The study of water-based magnetic fluids is one of the interesting topics on the scientific field. Water-based magnetic fluids (MF) and magnetite, used as a dispersed phase in a magnetic fluid, are practically harmless to the human body, and water is a unique medium with a number of anomalous properties. Magnetic fluids have a unique combination of fluidity and the ability to interact with a magnetic field. Their properties are determined by a set of characteristics of its constituent components (solid magnetic phase, dispersion medium and stabilizer), varying which, within a wide range, the physicochemical parameters of MF can be changed depending on the conditions of their application. Bentonite clays, in particular, montmorillonite particles bearing magnetite nanoparticles (Fe3O4), have been used quite often as magnetic particles
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
