Journal Home > Volume 1 , issue 2

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.


menu
Abstract
Full text
Outline
About this article

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

Show Author's information Yang BAIa,*( )Wenjie ZHANGaLijie QIAOaJi ZHOUb
Key Laboratory of Environmental Fracture (Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China
State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Abstract

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.

Keywords:

hexagonal ferrite, magnetic material, low temperature cofiring ceramics
Received: 03 June 2012 Accepted: 12 July 2012 Published: 08 September 2012 Issue date: June 2012
References(45)
[1]
Smit J, Wijn HBJ. Ferrites. London, UK: Cleaver-Hume Press, 1959.
[2]
Zhang HG, Zhou J, Wang YL, et al. Microstructure and physical characteristics of novel Z-type hexaferrite with Cu modification. J Electroceram 2002, 9: 73–79.
[3]
Zhang HG, Zhou J, Wang YL, et al. Investigation on physical characteristics of novel Z-type Ba3Co2(0.8-x)Cu0.40Zn2xFe24O41 hexaferrite. Mater Lett 2002, 56: 397–403.
[4]
Zhang HG, Zhou J, Wang YL, et al. The effect of Zn ion substitution on electromagnetic properties of low-temperature fired Z-type hexaferrite. Ceram Inter 2002, 28: 917–923.
[5]
Kračunovska S, Töpfer J. Preparation, thermal stability and permeability behavior of substituted Z-type hexagonal ferrites for multilayer inductors. J Electroceram 2009, 22: 227–232.
[6]
Bai Y, Zhou J, Gui ZL, et al. An investigation of the magnetic properties of Co2Y hexaferrite. Mater Lett 2002, 57: 807–811.
[7]
Bai Y, Zhou J, Gui ZL, et al. Magnetic properties of Cu, Zn modified Co2Y hexaferrites. J Magn Magn Materials 2002, 246: 140–144.
[8]
Bai Y, Zhou J, Gui ZL, et al. Complex Y-type hexagonal ferrites: an ideal material for high frequency chip magnetic components. J Magn MagnMater 2003, 264: 44–49.
[9]
Lisjakw D, Drofenik M. Influence of Ag on the composition and electromagnetic properties of low-temperature cofired hexaferrites. J Am Ceram Soc 2007, 90: 3121–3126.
[10]
Lisjakw D, Drofenik M. Thermal stability of (Co,Cu)Z-Hexaferrite and its compatibility with Ag at 900°C. J Am Ceram Soc 2007, 90: 3517–3521.
[11]
Kingery WD, Bowen HK, Uhlmann DR. Introduction to Ceramics (2nd ed.). New York, US: John Wiley & Sons, Academic Press, 1976.
[12]
Daigle A, DuPre E, Geiler A, et al. Preparation and characterization of pure-phase Co2Y ferrite powders via a scalable aqueous coprecipitation method. J Am Ceram Soc 2010, 93: 2994–2997.
[13]
Zhang CX, Shi JS, Yang XJ, et al. Effects of calcination temperature and solution pH value on the structural and magnetic properties of Ba2Co2Fe12O22 ferrite via EDTA-complexing process. Mater Chem Phys 2010, 123: 551–556.
[14]
Nagae M, Atsumi T, Yoshio T. Preparation of Y-type barium hexaferrite by the glass-ceramic method. J Am Ceram Soc 2006, 89: 1122–1124.
[15]
Bai Y, Zhou J, Gui ZL, et al. Phase formation process, microstructure and magnetic properties of Y-type hexagonal ferrite prepared by citrate sol-gel auto- combustion method. Mater Chem Phys 2006, 98: 66–70.
[16]
Bai Y, Zhou J, Gui ZL, et al. Preparation and magnetic properties of Y-type ferroxplana by sol-gel method. Key Eng Mater 2005, 280-283: 477–480.
[17]
Cai JH, Dai LQ, Zhou XB. Thermodynamic analysis on preparation of zinc doped Co2-Y planar hexagonal ferrite powder by chemical co-precipitation method. Chinese J Inorg Chem 2008, 24: 1943–1948.
[18]
Cai JH, Dai JQ, Chen WG, et al. Thermodynamic analysis on solubility of Fe3+/Ba2+/Co2+/Zn2+/Cu2+ in NH4HCO3-NH3 center dot H2O and NaOH-Na2CO3 system. Chinese J Inorg Chem 2009, 25: 886–892.
[19]
Hsu JY. Low temperature fired NiCuZn ferrite. IEEE T Magen 1994, 30: 4875–4877.
[20]
Nam JH, Jung HH, Shin JY, et al. Effect of Cu substitution on the electrical and magnetic properties of NiZn ferrites. IEEE T Magn 1995, 31: 3985–3987.
[21]
Zhang HG, Ma ZW, Zhou J, et al. Preparation and investigation of (Ni0.15Cu0.25Zn0.60)Fe1.96O4 ferrite with very high initial permeability from self-propagated powders. J Magn Magn Mater 2000, 213: 304–308.
[22]
Low KO, Sale FR. The development and analysis of property-composition diagrams on gel-derived stoichiometric NiCuZn ferrite. J Magn Magn Mater 2003, 256: 221–226.
[23]
Mürbe J, Töpfer J. High permeability Ni-Cu-Zn ferrites through additive-free low-temperature sintering of nanocrystalline powders. J Euro Ceram Soc 2012, 32: 1091–1098.
[24]
Wang XH, Ren TL, Li LT, et al. Synthesis of Cu-modified Co2Z hexaferrite with planar structure by a citrate precursor method. J Magn Magn Mater 2001, 234: 255–260.
[25]
Kračunovska S, Töpfer J. Synthesis, sintering behavior and magnetic properties of Cu-substituted Co2Z hexagonal ferrites. J Mater Sci: Mater Electron 2011, 22: 467–473.
[26]
Bai Y, Zhou J, Yue ZX, et al. Magnetic properties of composite Y-type hexagonal ferrites in a DC magnetic field. J Appl Phys 2005, 98: 063901.
[27]
Bai Y, Zhou J, Gui ZL, et al. The effect of Sr substitution on phase formation and magnetic properties of Y-type hexagonal ferrite. J Am Ceram Soc 2005, 88: 318–323.
[28]
Bai Y, Zhou J, Gui ZL, et al. Frequency dispersion of complex permeability of Y-type hexagonal ferrites. Mater Lett 2004, 58: 1602–1606.
[29]
Bai Y, Zhou J, Gui ZL, et al. Effect of substitution on magnetization mechanism for Y-type hexagonal ferrite. Mat Sci Eng B 2003, 103: 115–117.
[30]
Bai Y, Zhou J, Gui ZL, et al. Preparation and magnetic characterization of Y- type hexaferrites containing zinc, cobalt and copper. Mat Sci Eng B 2003, 99: 266–269.
[31]
Bai Y, Zhou J, Gui ZL, et al. Effect of Mn doping on physical properties of Y- type hexagonal ferrite. J Alloy Comp 2009, 473: 505–508.
[32]
Winotai P, Thongmee S, Tang IM. Cation distribution in bismuth-doped M-type barium hexaferrite. Mater Res Bull 2000, 35: 1747–1753.
[33]
Pal M, Brahma P, Chakravorty D, et al. Magnetic properties of Ba hexaferrites doped with bismuth oxide. J Magn Magn Mater 1995, 147: 208–212.
[34]
Pal M, Brahma P, Chakravorty D. Mixed valency character of bismuth in ferrite lattices. J Mater Sci Lett 1997, 16: 270–272.
[35]
Pal M, Brahma P, Chakraborty D, et al. DC conductivity in barium hexaferrites doped with bismuth oxide. Jpn J Appl Phys 1997, 36: 2163–2166.
[36]
Bai Y, Zhou J, Gui ZL, et al. The physic properties of Bi-Zn codoped Y-type hexagonal ferrite. J Alloy Comp 2008, 450: 412–416.
[37]
Bai Y, Zhou J, Gui ZL, et al. The effect of Bi substitution on phase formation and low temperature sintering of Y- type hexagonal ferrite. J Electroceram 2008, 21: 349–352.
[38]
Hsiang HI, Mei LT, His CH, et al. Crystalline phases and magnetic properties of Cu–Bi–Zn co-doped Co2Z ferrites. J Alloy Comp 2011, 509: 3343–3346.
[39]
Pires GFM, Rodrigues HO, Almeida JS, et al. Study of the dielectric and magnetic properties of Co2Y, Y-type hexaferrite (Ba2Co2Fe12O22) added with PbO and Bi2O3 in the RF frequency range. J Alloy Comp 2010, 493: 326–334.
[40]
Bai Y, Zhou J, Gui ZL, et al. Low-temperature sintered Y-type hexaferrites and their frequency properties. J Func Mater 2002, 33: 487–489.
[41]
Bai Y, Zhou J, Gui ZL, et al. Effect of Zn and Co doping on Co2Y hexagferrite. Piezoelectrics Acoustooptics 2002, 24: 135–138.
[42]
Bai Y, Xu F, Ai F, et al. Study on physical Properties of low temperature sintered Co2Y. Piezoelectrics Acoustooptics 2008, 30: 335–336.
[43]
Kračunovská S, Töpfer J. Co2Z, Co2Y and CoM-type hexagonal ferrites for multilayer inductors. Key Eng Mater 2010, 434-435: 361–365.
[44]
Bai Y, Zhou J, Gui ZL, et al. Electrical properties of non-stoichiometric Y-type hexagonal ferrite. J Magn Magn Mater 2004, 278: 208–213.
[45]
Bai Y, Zhou J, Gui ZL, et al. Magnetic properties of non-stoichiometric Y-type hexaferrite. J Magn Magn Mater 2002, 250: 364–369.
Publication history
Copyright
Acknowledgements
Rights and permissions

Publication history

Received: 03 June 2012
Accepted: 12 July 2012
Published: 08 September 2012
Issue date: June 2012

Copyright

© The author(s) 2012

Acknowledgements

This work was supported by grants from the National Natural Science Foundation of China (No. 51172020), and the Fundamental Research Funds for the Central Universities (No. FRF-TP-09-028A).

Rights and permissions

This article is published with open access at Springerlink.com

Reprints and Permission requests may be sought directly from editorial office.

Return