INORGANIC SYNTHESIS AND INDUSTRIAL
ISSN 1070-4272, Russian Journal of Applied Chemistry, 2014, Vol. 87, No. 8, pp. 1054−1059. © Pleiades Publishing, Ltd., 2014.
Original Russian Text © L.A. Frolov, A.A. Pivovarov, A.S. Baskevich, A.I. Kushnerev, 2014, published in Zhurnal Prikladnoi Khimii, 2014, Vol. 87, No. 8,
Structure and Properties of Nickel Ferrites Produced
by Glow Discharge in the Fe
L. A. Frolov
, A. A. Pivovarov
, A. S. Baskevich
, and A. I. Kushnerev
Ukrainian State University of Chemical Engineering, pr. Gagarina 8, Dnepropetrovsk, 49005 Ukraine
Dnepropetrovsk National University, ul. Nauki 13, Dnepropetrovsk, 320625 Ukraine
Received August 20, 2014
Abstract—Effect of a glow discharge on the ferritization process in the Fe
system was studied.
The phase and granulometric composition of the samples synthesized was determined. The crystal lattice constants
and the crystallite size were found to depend on the synthesis conditions. The main magnetic characteristics of
the samples obtained were measured.
At present, increasingly keen attention is being paid
to the development of nanotechnologies and formation
processes of nanosystems, including those composed of
ultradispersed particles and powders [1–5]. Application
of various kinds of electric discharges makes it possible
to perform treatment of solutions and suspensions via the
action of numerous factors accompanying their appear-
ance (various kinds of radiation, ﬁ elds, electrochemical
To the most promising methods employing electric
discharges should be attributed methods based on the
contact action of the nonequilibrium plasma of a lowered-
pressure glow discharge on the disperse medium being
treated. It has been shown  that treatment of aqueous
solutions with a nonequilibrium plasma causes oxidation
and reduction of solution components. In the process,
metal ions are oxidized to give insoluble or poorly soluble
Despite the wide variety of studies concerned with
plasma technologies, insufﬁ cient attention is being paid
in the scientiﬁ c literature to a fundamentally important
issue, to the mechanism by which plasma affects oxida-
tion and reduction processes. One of the most important
processes involving primary active species is the genera-
tion of H. and OH. radicals and solvated ions. Thus, the
gas-discharge activation of solutions can initiate both
reduction and oxidation processes. An intricate complex
of physicochemical processes in the plasma–ﬂ uid system
leads to a kind of activation of water and aqueous solu-
tions [7, 8].
Systems employing the interaction of physical ﬁ elds
with a ﬂ uid are used in practice for wastewater puriﬁ ca-
tion, water treatment, and microbiology. However, the
literature hardly describes the chemical mechanism of
processes occurring in salt solutions, sols, and gels under
the action of a contact nonequilibrium plasma (CNP).
In addition, there are no data related to new properties
acquired by solutions on being treated.
Thus, as judged from the observed effects (decomposi-
tion of various compounds, intensiﬁ cation of physicochem-
ical processes), it is advisable to use the plasmochemical
effect to activate the process of ferrite formation.
The goal of our study was to examine the possibility
that nickel ferrites can be formed under the action of a CNP
and to determine the phase and dispersion composition of
the resulting products and their magnetic characteristics.
To solve the problem at hand, we synthesized several
samples. The sample synthesis conditions are listed in