Co2Z, Co2Y and CoM-Type Hexagonal Ferrites for Multilayer Inductors

Silvia Kračunovská; Joerg Töpfer

doi:10.4028/www.scientific.net/KEM.434-435.361

Paper Titles

Effect of Specific Surface Area on Growth and Porosity of Oxide Superconducting Ceramic YBCO Single Domain
p.346

Comparative Study on Ni-Zn Ferrites by One-Step Synthesis and Conventional Two-Step Synthesis
p.350

Synthesis of Magnetic Nano-Composite by Partial Reduction of Barium Hexaferrite via High-Energy Ball Milling
p.354

Low Temperature Sintering of Ferro-Materials with Both Capacitance and Inductance Properties
p.357

Co₂Z, Co₂Y and CoM-Type Hexagonal Ferrites for Multilayer Inductors
p.361

Glass Binder in Thick Film Metallization Paste for AlN
p.366

Microwave Assisted Deposit Oxide Ceramic Coating onto Metal
p.369

Dielectric and Sintering Properties of the Doping CaO-B₂O₃-SiO₂ System Low Temperature Co-Fired Ceramics
p.371

Control of the Shrinkage during Hybrid Microwave Sintering of Nano-Sized ZnO Based Powder for Varistors
p.376

HomeKey Engineering MaterialsKey Engineering Materials Vols. 434-435Co2Z, Co2Y and CoM-Type Hexagonal Ferrites for...

Co₂Z, Co₂Y and CoM-Type Hexagonal Ferrites for Multilayer Inductors

Abstract:

Abstract. Hexagonal Co-containing Z-; Y- and M-type ferrites are used as soft magnetic materials for multilayer inductors for operating frequencies up to 3 GHz. Co2Z-type Ba3Co2Fe24O41, iron excess Ba3Co2-yFe24+yO41 (0  y  0.8) and Ba3Co2-CuxFe24O41 (0  x  1.0) ferrites have their stability intervals between 1260-1350°C. The permeability of a ferrite with y = 0.6 sintered at 1300°C is µ = 30 throughout the MHz. Addition of Bi2O3 shifts the maximum shrinkage down to 950°C. Their permeability is µ = 5 because of partial decomposition of the Co2Z phase. Y-type ferrite Ba2Co1.2-xZnxCu0.8Fe12O22 (x = 1.2) sintered at 1100°C shows a permeability of µ = 20. Sintering at 900°C reduces the permeability to µ = 10. M-type BaCo1.2Ti1.2Fe9.6O19 ferrites sintered at 970°C display a permeability of µ = 35.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 434-435)

Pages:

361-365

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.434-435.361

Citation:

Cite this paper

Online since:

March 2010

Authors:

Silvia Kračunovská, Joerg Töpfer

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] M. Pardavi-Horvath: J. Magn. Magn. Magn. Mater. Vol. 216-216 (2000), pp.171-183.

Google Scholar

[2] G. H. Jonker, H.P.K. Wijn and P.B. Braun: Philips Technol. Rev. Vol. 18 (1956), pp.145-180.

Google Scholar

[3] K. Hirota, T. Aoyama, S. Enomoto, et al.: J. Magn. Magn. Magn. Mater. Vol. 205 (1999), p.283.

Google Scholar

[4] J. Smit and H.P.J. Wijn, Ferrites: Philips Technical Library, Eindhoven (1959), p.285.

Google Scholar

[5] M. Sugimoto, in: E.P. Wohlfarth (Ed. ), Ferromagnetic Materials Vol. 3 (1982), p.394.

Google Scholar

[6] J. Smit and H.P.J. Wijn: Ferrites, Philips Technical Library, Eindhoven (1959), chapter IX.

Google Scholar

[7] D. J. de Bitetto: J. Appl. Phys. Vol. 35 (1964), p.3482.

Google Scholar

[8] I.G. Chen, S. H. Hsu and Y.H. Chang: J. Appl. Phys. Vol. 87 (2000) p.6247.

Google Scholar

[9] T. Tachibana, T. Nakagawa, Y. Takada, et al.: J. Magn. Magn. Mater. Vol. 262 (2003), pp.248-257.

Google Scholar

[10] S. Kračunovská and J. Töpfer, J. Magn. Magn. Mater Vol. 320 (2008), pp.1370-1376.

Google Scholar

[11] S. Kračunovská and J. Töpfer, J. Electroceramics Vol. 22 (2009), pp.227-232.

Google Scholar