Crystalline phases and magnetic properties of Cu–Bi–Zn co-doped Co2Z ferrites

Hsiang, Hsing I.; Li, Mei; Hsi, Chi‐Shiung; Cheng, Li Bao; Yen, Fu‐Su

doi:10.1016/j.jallcom.2010.12.060

Cited by 12 publications

(2 citation statements)

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“…However, the valance variation of Bi and Fe ions destroys the dielectric character obviously, so such substitution is not suitable for the soft magnetic ferrite. In addition, Bi can also substitute for Ba due to their similar radius, which has been proved feasible in hexagonal ferrites, such as Y-type and Z-type hexagonal ferrites [36][37][38] Similar to Cu substitution, Bi substitution can also lower the phase formation temperature of Y-type hexagonal ferrite. As shown in Fig.…”

Section: Bi Substitutionmentioning

confidence: 99%

Low-fired Y-type hexagonal ferrite for hyper frequency applications

Bai

Zhang

et al. 2012

J Adv Ceram

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Y-type hexagonal ferrite with planar magnetocrystalline anisotropy has ultrahigh cut-off frequency up to GHz and excellent magnetic properties in hyper frequency range, so that is regarded as the most suitable material in correpongding inductive devices and components. The technology of low temperature cofired ceramics for surface-mounted multilayer chip components needs ferrite to be sintered well under 900 ℃ to avoid the melting and diffusion of Ag inner electrode during the cofiring process. To lower the sintering temperature of Y-type hexagonal ferrite, there are several methods, (1) using nano-sized starting powders, (2) substitution by low-melting elements, (3) adding sintering additives, and (4) introducing lattice defect. In this paper, the effects of different methods on the sintering behavior and the magnetic properties were discussed in detail.

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Section: Bi Substitutionmentioning

confidence: 99%

Low-fired Y-type hexagonal ferrite for hyper frequency applications

Bai

Zhang

et al. 2012

J Adv Ceram

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“…Therefore, it is desirable to develop a magnetic material that has a higher quality factor than non-magnetic materials at 200-300 MHz, for use in making high frequency chip inductors. Magneto-plumbite ferrites with hexagonal structure have revealed a higher dispersion frequency than that of NiCuZn ferrites, which can be used in the high frequency applications [5][6][7][8][9][10][11][12]. Among those ferrites, the Co 2 Y ferrite 2(BaO)·2(CoO)·6(Fe 2 O 3 ) have good magnetic properties (such as permeability and quality factor) above 200 MHz [13,14].…”

Section: Introductionmentioning

confidence: 99%