Effect of surfactants on wet grinding of barium hexaferrite powders and on the microstructure of sintered magnets on their basis


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Abstract

The effect of citric acid and isopropyl alcohol on the wet grinding of the mixture of initial ferriteforming components and synthesized ferrite charge has been analyzed. It has been established that the introduction of admixtures during wet grinding makes it possible to substantially reduce the ferrite synthesis temperature and the sintering temperature of green billets and to improve the magnetic properties of permanent magnets made of barium ferrites by the formation of a dense, fine-grained structure. The increase in the activity of powders is explained by the formation of active jelly-like interlayers on the surfaces of particles during wet grinding.

About the authors

V. G. Andreev

National Research Technological University MISiS; Kuznetsk Institute of Information and Management Technologies

Author for correspondence.
Email: ilem58@mail.ru
Russian Federation, Moscow, 119049; Kuznetsk, Penza oblast, 442530

V. G. Kostishin

National Research Technological University MISiS

Email: ilem58@mail.ru
Russian Federation, Moscow, 119049

A. G. Nalogin

AO NPP Istok im. Shokina

Email: ilem58@mail.ru
Russian Federation, Fryazino, Moscow oblast, 141190

A. Yu. Adamtsov

Southwest State University

Email: ilem58@mail.ru
Russian Federation, Kursk, 305040

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