Conclusions
Changing the pressure in the hot pressing of manganese-zinc ferrites affects both the composition and state of the solid-phase system and the structural characteristics of specimens. With rise in hot-pressing pressure, the Fe2+ concentration, density, Curie temperature, and degree of inversion increase; there is also a tendency for the initial magnetic permeability to fall and for the crystallite size to grow. An interrelationship is shown to exist between the Fe2+ content of manganese-zinc ferrospinel on the one hand and the degrees of nonstoichiometry and inversion on the other.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
Akio Ikeda, Murya Satomi, and Hirayuki Chiba, “Hot pressed ferrites and magnetic heads,” Ferrites, Proceedings of an International Conference, Kyoto (1971), pp. 337–339.
V. V. Lyukshin and Yu. M. Yakovlev, “Ferrite magnetic heads for video recording,” Zarubezhn. Elektron. Tekh., No. 11(83), 3–23 (1974).
Sugaiya, “A new magnetic recording head with a hot-pressed ferrite core,” Zarubezhn. Elektron., No. 1, 153–166 (1970).
D. A. Prokoshkin, L. M. Sokolenko, and Yu. A. Bykov, “High-permeability manganese-zinc ferrites produced by a nonvacuum hot-pressing process,” Izv. Vyssh. Uchebn. Zaved., Mashinostr., No. 12, 109–112 (1976).
J. Smit and H. P. J. Wijn, Ferrites, Philips Technical Library (1959).
V. P. Pashchenko, V. N. Bogoslovskii, and G. A. Potapov, “Determination of the density and porosity of ferrite parts,” Zavod. Lab., No. 12, 1486–1487 (1975).
Toshikazu Tonaka, “Effects of the oxide nonstoichiometry on the domain structure and the initial permeability in Mn-Zn ferrites,” Jpn. J. Appl. Phys.,17, No. 2, 349–354 (1978).
V. I. Arkharov, V. N. Bogoslovskii, and V. P. Pashchenko, “Investigation of the crystal lattice defectiveness of nonequilibrium spinel phases,” Izv. Akad. Nauk SSSR, Neorg. Mater.,7, No. 10, 1812–1816 (1971).
L. Néel, Antiferromagnetism [Russian translation], IIL, Moscow (1956).
J. B. Goodenough and A. L. Loeb, “Theory of ionic ordering, crystal distortion, and magnetic exchange due to covalent forces in spinels,” Phys. Rev.,98, No. 2, 391–408 (1955).
F. K. Lotgering and A. M. Van Diepen, “Valencies of manganese and iron in Mn cubic ferrites as observed in paramagnetic Mössbauer spectra,” J. Phys. Chem. Solids,34, No. 8, 1369–1377 (1973).
J. S. Anderson and B. G. Hyde, “On the possible role of dislocations in generating ordered shear structures,” J. Phys. Chem. Solids,28, 1393–1396 (1967).
V. I. Arkharov, V. N. Bogoslovskii, R. V. Kotel'va, and V. P. Pashchenko, “Crystal lattice defectiveness of nickel ferrites,” Dokl. Akad. Nauk SSSR,199, No. 5, 1088–1091 (1971).
V. P. Pashchenko and G. A. Potapov, “Effects of synthesis temperature on the crystallattice defectiveness and degree of inversion of magnesium ferrites,” Poroshk. Metall., No. 8, 65–67 (1975).
Author information
Authors and Affiliations
Additional information
Translated from Poroshkovaya Metallurgiya, No. 8(236), pp. 80–85, August, 1982.
Rights and permissions
About this article
Cite this article
Pashchenko, V.P., Bykov, Y.A., Mikharskii, S.N. et al. Nonstoichiometry and physical properties of hot-pressed manganese-zinc ferrites. Powder Metall Met Ceram 21, 669–673 (1982). https://doi.org/10.1007/BF00795527
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00795527