Peculiarities of the Crystal Structure and Texture of Isotropic and Anisotropic Polycrystalline Hexagonal Ferrites BaFe 12 O 19  Synthesized by Radiation-Thermal Sintering

I. M. Isaev; A. A. Bryazgin; M. V. Korobeynikov; M. A. Mihaylenko; M. V. Kalinyuk; E. A. Belokon’; V. V. Korovushkin; A. A. Alekseev; B. K. Ostafijchuk; V. V. Mokljak; A. G. Nalogin; V. G. Kostishin; S. V. Shcherbakov; D. V. Salogub

doi:10.1134/S1063739719080079

Peculiarities of the Crystal Structure and Texture of Isotropic and Anisotropic Polycrystalline Hexagonal Ferrites BaFe₁₂O₁₉ Synthesized by Radiation-Thermal Sintering

Authors: Isaev I.M.¹, Bryazgin A.A.², Korobeynikov M.V.², Mihaylenko M.A.², Kalinyuk M.V.³, Belokon’ E.A.¹^,4, Korovushkin V.V.¹, Alekseev A.A.¹^,4, Ostafijchuk B.K.³, Mokljak V.V.⁵, Nalogin A.G.⁴, Kostishin V.G.¹, Shcherbakov S.V.⁴, Salogub D.V.¹
Affiliations:
1. National University of Science and Technology MISIS
2. Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences
3. Stefanyk Precarpathian National University
4. AO NPP Istok im. Shokina
5. Kurdyumov Institute for Metal Physics, National Academy of Sciences
Issue: Vol 48, No 8 (2019)
Pages: 531-544
Section: Article
URL: https://journals.rcsi.science/1063-7397/article/view/187282
DOI: https://doi.org/10.1134/S1063739719080079
ID: 187282

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Abstract

In this work the crystal structure and texture of isotropic and anisotropic polycrystalline hexagonal ferrites BaFe₁₂O₁₉ obtained by the method of radiation-thermal sintering (RTS) is studied using X-ray diffraction and X-ray phase analysis. Crude blanks of both isotropic and anisotropic hexaferrites are obtained by the standard method of ceramic technology from the same raw material (Fe₂O₃ and BaCO₃ of the analytical grade brand) and on the same equipment with the only difference being that the anisotropic blanks were pressed in the magnetic field H = 10 kOe. For sintering raw billets, a linear electron accelerator ILU-6 (electron energy E_e = 2.5 MeV) is used (Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences). The samples are sintered in air for one hour at 1200, 1250, 1300, and 1350°C. It is shown for the first time that high-quality single-phase isotropic and anisotropic hexaferrites BaFe₁₂O₁₉ can be obtained from raw blanks of a ferritized charge using the RTS technology. The properties of the crystal structure and texture of the obtained objects of the research are described. It is established for the first time that the dependence of the pref.orient.o1 predominant orientation of the crystal texture parameter on the degree of the magnetic texture f in polycrystalline hexagonal barium ferrites of type M is described by the expression pref.orient.o1 = –0.005f + 0.6886.

Keywords

hexagonal polycrystalline ferrite BaFe₁₂O₁₉, isotropic hexaferrite, anisotropic hexaferrite, crystal structure, crystal texture, magnetic texture, texture degree, parameter pref.orient.o1, ferritized charge, compaction in a magnetic field

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Peculiarities of the Crystal Structure and Texture of Isotropic and Anisotropic Polycrystalline Hexagonal Ferrites BaFe12O19 Synthesized by Radiation-Thermal Sintering

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Peculiarities of the Crystal Structure and Texture of Isotropic and Anisotropic Polycrystalline Hexagonal Ferrites BaFe₁₂O₁₉ Synthesized by Radiation-Thermal Sintering