Obtaining anisotropic hexaferrites for the base layers of microstrip shf devices by the radiation-thermal sintering
DOI:
https://doi.org/10.15587/1729-4061.2016.80070Keywords:
hexagonal ferrite, radiationthermal sintering, pressing, magnetic field, textureAbstract
The technology of obtaining anisotropic polycrystalline hexagonal ferrites by the thermal radiation sintering is developed. Using the thermal radiation sintering, we obtained the samples of anisotropic polycrystalline hexaferrites BaFe12O19, BaFe12–х AlхO19 (with the Ni, Ti, Mn additives), SrFe12O19 and SrFe12–хAlхO19 (with the Ca, Si additives) for the base layers of the microstrip ferrite untying instruments of the shortwave part of the millimeter wavelength range. The essence of the RTS technology is the obtaining, by the method of classical ceramic technology, by pressing in the strong magnetic field, of raw billets with their consequent sintering in the beam of fast electrons. The use of different compositions and alloying additives makes it possible to control the electromagnetic and magnetic properties of hexaferrites.
The advantages of the RTS technology consist in high energy efficiency, high values of operating characteristics of the obtained material and low duration of the process of sintering.
It was established that the RTS technology may prove to be an alternative technology when obtaining the highquality polycrystalline hexaferrites M of elementary and complex substituted compositions.
Owing to the low energy and time costs, high values of the performance parameters, the RTS technology of anisotropic hexaferrites may find wide application when obtaining permanent anisotropic magnets and various miniature SHFdevices.References
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Copyright (c) 2016 Vladimir Kostishyn, Igor Isaev, Sergey Shcherbakov, Alexey Nalogin, Eugene Belokon, Alexander Bryazgin
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