Electromagnetic wave absorption properties of Co-Ti substituted Ba M-type ferrite produced by a modified chemical coprecipitation

Kazuaki Haga; Satoshi Sugimoto; Toshio Kagotani; Koichiro Inomata

doi:10.2320/matertrans.45.2606

Electromagnetic wave absorption properties of Co-Ti substituted Ba M-type ferrite produced by a modified chemical coprecipitation

Kazuaki Haga, Satoshi Sugimoto, Toshio Kagotani, Koichiro Inomata

ENG - Materials Science

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

In this paper, the electromagnetic wave absorption properties of Co-Ti substituted Ba M-type hexagonal ferrite (BaFe_9.5(Co _1-yTi_yO₁₉ (y = 0.4 - 0.8)) produced by a modified coprecipitation method were investigated. This modified chemical coprecipitation method was the combination of the coprecipitation and the synthesis from a salt melt. The sample, Ba_9.5(Co_0.5Ti _0.5)_2.5O₁₉ sintered at 1423 K for 5h, whose powder was produced by the modified coprecipitation method, exhibited high permeability (μ_{″r max} = 11) and reflection loss (R.L.) around -10 dB at a relatively wide frequency range (0.8 - 9 GHz) comparable to the Ultra Wide Band (UWB). In order to enhance the sintering, the addition of Bi₂O₃ was carried out. The Ba_9.5(Co _0.4Ti_0.6)_2.5O₁₉ sample sintered at 1423 K for 5 h with a Bi₂O₃ content of 2 mass%, exhibited high permeability (″μ_{r max} = 25 and ″μ _{r at 1 GHz} = 10). This sample also showed good microwave absorption properties (reflection loss: R.L. < -20dB) with a small matching thickness (d_m) of 3.1 mm at 0.65 GHz and f · d product (f · d) of 2.0GHz·mm. It can be said that the Ba M-type ferrite produced by the modified coprecipitation method has a possibility to become a material for the thinner microwave absorber in the several GHz range.

Original language	English
Pages (from-to)	2606-2609
Number of pages	4
Journal	Materials Transactions
Volume	45
Issue number	8
DOIs	https://doi.org/10.2320/matertrans.45.2606
Publication status	Published - 2004 Aug

Keywords

Barium ferrite
Cobalt-titanium substitute
Electromagnetic absorber
Magnetoplumbite type
Matching frequency
Matching thickness
Natural resonance
Reflection loss
Ultra wide band

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.2320/matertrans.45.2606

Cite this

@article{9d609f92117a40139a879ee73288a8a5,

title = "Electromagnetic wave absorption properties of Co-Ti substituted Ba M-type ferrite produced by a modified chemical coprecipitation",

abstract = "In this paper, the electromagnetic wave absorption properties of Co-Ti substituted Ba M-type hexagonal ferrite (BaFe9.5(Co 1-yTiyO19 (y = 0.4 - 0.8)) produced by a modified coprecipitation method were investigated. This modified chemical coprecipitation method was the combination of the coprecipitation and the synthesis from a salt melt. The sample, Ba9.5(Co0.5Ti 0.5)2.5O19 sintered at 1423 K for 5h, whose powder was produced by the modified coprecipitation method, exhibited high permeability (μ″r max = 11) and reflection loss (R.L.) around -10 dB at a relatively wide frequency range (0.8 - 9 GHz) comparable to the Ultra Wide Band (UWB). In order to enhance the sintering, the addition of Bi2O3 was carried out. The Ba9.5(Co 0.4Ti0.6)2.5O19 sample sintered at 1423 K for 5 h with a Bi2O3 content of 2 mass%, exhibited high permeability (″μr max = 25 and ″μ r at 1 GHz = 10). This sample also showed good microwave absorption properties (reflection loss: R.L. < -20dB) with a small matching thickness (dm) of 3.1 mm at 0.65 GHz and f · d product (f · d) of 2.0GHz·mm. It can be said that the Ba M-type ferrite produced by the modified coprecipitation method has a possibility to become a material for the thinner microwave absorber in the several GHz range.",

keywords = "Barium ferrite, Cobalt-titanium substitute, Electromagnetic absorber, Magnetoplumbite type, Matching frequency, Matching thickness, Natural resonance, Reflection loss, Ultra wide band",

author = "Kazuaki Haga and Satoshi Sugimoto and Toshio Kagotani and Koichiro Inomata",

year = "2004",

month = aug,

doi = "10.2320/matertrans.45.2606",

language = "English",

volume = "45",

pages = "2606--2609",

journal = "Materials Transactions",

issn = "1345-9678",

publisher = "Japan Institute of Metals (JIM)",

number = "8",

}

TY - JOUR

T1 - Electromagnetic wave absorption properties of Co-Ti substituted Ba M-type ferrite produced by a modified chemical coprecipitation

AU - Haga, Kazuaki

AU - Sugimoto, Satoshi

AU - Kagotani, Toshio

AU - Inomata, Koichiro

PY - 2004/8

Y1 - 2004/8

N2 - In this paper, the electromagnetic wave absorption properties of Co-Ti substituted Ba M-type hexagonal ferrite (BaFe9.5(Co 1-yTiyO19 (y = 0.4 - 0.8)) produced by a modified coprecipitation method were investigated. This modified chemical coprecipitation method was the combination of the coprecipitation and the synthesis from a salt melt. The sample, Ba9.5(Co0.5Ti 0.5)2.5O19 sintered at 1423 K for 5h, whose powder was produced by the modified coprecipitation method, exhibited high permeability (μ″r max = 11) and reflection loss (R.L.) around -10 dB at a relatively wide frequency range (0.8 - 9 GHz) comparable to the Ultra Wide Band (UWB). In order to enhance the sintering, the addition of Bi2O3 was carried out. The Ba9.5(Co 0.4Ti0.6)2.5O19 sample sintered at 1423 K for 5 h with a Bi2O3 content of 2 mass%, exhibited high permeability (″μr max = 25 and ″μ r at 1 GHz = 10). This sample also showed good microwave absorption properties (reflection loss: R.L. < -20dB) with a small matching thickness (dm) of 3.1 mm at 0.65 GHz and f · d product (f · d) of 2.0GHz·mm. It can be said that the Ba M-type ferrite produced by the modified coprecipitation method has a possibility to become a material for the thinner microwave absorber in the several GHz range.

AB - In this paper, the electromagnetic wave absorption properties of Co-Ti substituted Ba M-type hexagonal ferrite (BaFe9.5(Co 1-yTiyO19 (y = 0.4 - 0.8)) produced by a modified coprecipitation method were investigated. This modified chemical coprecipitation method was the combination of the coprecipitation and the synthesis from a salt melt. The sample, Ba9.5(Co0.5Ti 0.5)2.5O19 sintered at 1423 K for 5h, whose powder was produced by the modified coprecipitation method, exhibited high permeability (μ″r max = 11) and reflection loss (R.L.) around -10 dB at a relatively wide frequency range (0.8 - 9 GHz) comparable to the Ultra Wide Band (UWB). In order to enhance the sintering, the addition of Bi2O3 was carried out. The Ba9.5(Co 0.4Ti0.6)2.5O19 sample sintered at 1423 K for 5 h with a Bi2O3 content of 2 mass%, exhibited high permeability (″μr max = 25 and ″μ r at 1 GHz = 10). This sample also showed good microwave absorption properties (reflection loss: R.L. < -20dB) with a small matching thickness (dm) of 3.1 mm at 0.65 GHz and f · d product (f · d) of 2.0GHz·mm. It can be said that the Ba M-type ferrite produced by the modified coprecipitation method has a possibility to become a material for the thinner microwave absorber in the several GHz range.

KW - Barium ferrite

KW - Cobalt-titanium substitute

KW - Electromagnetic absorber

KW - Magnetoplumbite type

KW - Matching frequency

KW - Matching thickness

KW - Natural resonance

KW - Reflection loss

KW - Ultra wide band

UR - http://www.scopus.com/inward/record.url?scp=6344233906&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=6344233906&partnerID=8YFLogxK

U2 - 10.2320/matertrans.45.2606

DO - 10.2320/matertrans.45.2606

M3 - Article

AN - SCOPUS:6344233906

SN - 1345-9678

VL - 45

SP - 2606

EP - 2609

JO - Materials Transactions

JF - Materials Transactions

IS - 8

ER -

Electromagnetic wave absorption properties of Co-Ti substituted Ba M-type ferrite produced by a modified chemical coprecipitation

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this