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Preparation of Electromagnetic wave absorber Barium Ferrites for Electromagnetic Environment by liquid State Reaction

Research Project

Project/Area Number 12450269
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionOKAYAMA UNIVERSITY

Principal Investigator

YOSHIO Tetsuo  Okayam University, Environmental Science and Technology, Professor, 環境理工学部, 教授 (70032943)

Co-Investigator(Kenkyū-buntansha) FUJII Tatsuo  Okayama University, The Graduate School of Natural Science and Technology, Associate Professor, 大学院・自然科学研究科, 助教授 (10222259)
TAKADA Jun  Okayama University, The Graduate School of Natural Science and Technology, Professor, 大学院・自然科学研究科, 教授 (60093259)
NAGAE Masahiro  Okayama University, The Graduate School of Natural Science and Technology, Research Associate, 大学院・自然科学研究科, 助手 (60304341)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2002: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2001: ¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 2000: ¥7,400,000 (Direct Cost: ¥7,400,000)
Keywordselectromagnetic wave obstacle / glass ceramic method / Y-type Ba-ferrite / electromagnetic wave absorber / solid solution
Research Abstract

In the present study, we tried the synthesis of Y-type Ba-hexaferrite expected as an electromagnetic wave absorber by the glass ceramic method. The results are summarized as follows.
The glasses with composition of 0.1MO[xB_2O_3・yBaO・(1-x-y)Fe_2O_3] were prepared and the precipitation process of Y-type Ba-hexaferrite from the glass matrix was investigated. Y-type Ba-hexaferrite particles were precipitated by heating the glass at temperatures between 820℃ and 1100℃. Based on these results, hexagonal platelets of Y-type Ba-hexaferrite with fairly uniform dimension were obtained as precipitates from the glass matrix by leaching with a dilute HCl solution. The low-temperature formation of Y-type Ba-hexafcrrite was due to a reaction between M-type Ba-ferrite and liquid phase. Substitutional solid solutions of Y-type Ba-hexaferrite (Ba_2Zn_<2-x>Co_xFe_<12>O_<22>) were obtained in all composition range. These Y-type Ba-hexaferrite solid solutions showed electromagnetic absorption spectra at frequency range of 8 to 9 GHz.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (45 results)

All Other

All Publications (45 results)

  • [Publications] 中西 真: "プレセラミックス法によるN-Znフェライト/SiC系複合焼結体の作製と電磁波吸収特性"粉体および粉末冶金. 47. 927-930 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 青木 薫: "ごみ焼却炉模擬灰による炭化けい素の高温腐食"耐火物. 52. 520-523 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 青木 薫: "300℃の水蒸気中における炭化ケイ素焼結体の腐食挙動"材料と環境. 49. 706-709 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 吉尾哲夫: "材料の腐食科学のうねりとセラミックス"材料と環境. 49. 717-718 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Tamai: "Hydrothermal Corrosion and Strength Degradation of Aluminum Nitride Ceramics"J.Am.Ceram.Soc.. 83. 3216-3218 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 玉井博康: "メタライズ窒化アルミニウムの耐湿性に及ぼす被膜欠陥の極値統計解析による評価"材料. 50. 322-328 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 玉井博康: "予備酸化およびスパッタリング金属被覆した窒化アルミニウムセラミックスの耐水性"材料. 50. 538-542 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Nagae: "Microstructure of Molybdenum Nitride Layer Formed by Nitriding of Molybdenum Metal"J.Am.Ceram.Soc.. 84. 1175-1177 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Nagae: "Grain Growth Control of Dilute Molybdenum-Titanium Alloys by Multi-Step Internal Nitriding"Proc.of the 15^<th> Int.Plansee Seminar. Vol.1. 257-266 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Nagae: "Mechanical Properties of Molybdenum-Titanium Alloys Microstructurally Controlled by Multi-Step Internal Nitriding"Proc.of the 15^<th> Int.Plansee Seminar. Vol.1. 248-256 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Fujii: "Low-temperature growth of c-axis oriented Y-type hexagonal ferrite thin films by polymeric precursor method"J.Mater.Res.. 16. 2471-2474 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 星加哲志: "炭化処理を行ったモリブデン合金の硬さ分布"粉体および粉末冶金. 49. 32-36 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 高田 潤: "プレセラミックス法によるフェライト系複合材料の作製と電波吸収特性"日本応用磁気学会誌. 26. 818-822 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Oda: "Oxidation of Boron Nitride Powder in Wet Oxygen"Journal of the Ceramic Society of Japan. 111. 81-82 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.Nomura: "Surface Modification of Dilute Mo-Ti Alloys by Gas Carburization"Proc.of International Conference on Processing & Manufacturing of Advanced Materials. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Hidaka: "Influence of Multi-Step Internal Nitriding Condition upon Mechanical Properties of Dilute Mo-Ti Alloys"Proc.of International Conference on Processing & Manufacturing of Advanced Materials. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Nakanishi: "Preparation and Absorption Characteristics of Ni-Zn Ferrite/SiC Sintered Composites Prepared by Pre-Ceramics Method"J. Japan Soc. Of Powder and Powder Metallurgy. 47. 927-930 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Aoki: "High-Temperature Corrosion of Silicon Carbide in Simulated Incinerator Ash"Taikabutsu. 52. 520-523 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Aoki: "Corrosion Behavior of Sintered Silicon Carbide in Water Vapor at 300℃"Zairyo-to-Kankyo. 48. 706-709 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Yoshio: "Ceramics and Wave of Corrosion Science of Materials"Zairyo-to-Kankyo. 49. 717-718 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Tamai: "Hydrothermal Corrosion and Strength Degradation of Aluminum Nitride Ceramics"J. Am. Ceram. Soc.. 83. 3216-3218 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Tamai: "Evaluation of Effect of Film Defects on Hydrothermal Corrosion Resistance of Metallized Aluminum Nitride Ceramics by Statistics of Extreme"Zairyo. 50. 322-328 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Tamai: "Corrosion Resistance of Aluminum Nitride Ceramics Modified by Pre-Oxidation and Sputtering Metallization in Water at 100℃"Zairyo. 50. 538-542 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Nagae: "Microstructure of Molybdenum Nitride Layer Formed by Nitriding of Molybdenum Metal"J. Am. Ceram. Soc.. 84. 1175-1177 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Nagae: "Grain Growth Control of Dilute Molybdenum-Titanium Alloys by Multi-Step Internal Nitriding"Proc. Of the 15^<th> Int. Plansee Seminar. Vol. 1. 257-266 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Nagae: "Mechanical Properties of Molybdenum-Titanium Alloys Microstructurally Controlled by Multi-Step Internal Nitriding"Proc. Of the 15^<th> Int. Plansee Seminar. Vol. 1. 248-256 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Fujii: "Low-tempperature growth of c-axis oriented Y-type hexagonal ferrite thin films by polymeric precursor method"J. Mater. Res.. 16. 2471-2474 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Hoshika: "Hardness Distribution of Molybdenum Alloys which Performed Carbonization Treatment"J. Japan Soc. Of Powder and Powder Metallurgy. 49. 32-36 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Takada: "Preparation and Absorption Characteristics of Ferrite-Based Composites Prepared by the Pre-Ceramics Method"J. Magn. Soc. Jpn.. 26. 818-822 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Oda: "Oxidation of Boron Nitride Powder in Wet Oxygen"Journal of the Ceramic Society of Japan. 111. 81-82 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Nomura: "Surface Modification of Dilute Mo-Ti Alloys by Gas Carburization"Proc. Of International Conference on Processing & Manufacturing of Advanced Materials. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Hidaka: "Influence of Multi-Step Internal Nitriding Condition upon Mechanical Properties of Dilute Mo-Ti Alloys"Proc. Of International Conference on Processing & Manufacturing of Advanced Materials. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.Nomura: "Surface Modification of Dilute Mo-Ti Alloys by Gas Carburization"Proc.of International Conference on Processing & Manufacturing of Advanced Materials. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Hidaka: "Influence of Multi-Step Internal Nitriding Condition upon Mechanical Properties of Dilute Mo-Ti Alloys"Proc. of International Conference on Processing & Manufacturing of Advanced Materials. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] 小田 耕平: "Oxidation of Boron Nitride Powder in Wet Oxygen"Journal of the Ceramic Society of Japan. 111・1. 81-82 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 星加 哲志: "炭化処理を行ったモリブデン合金の硬さ分布"粉体および粉末冶金. 49. 32-36 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 高田 潤: "プレセラミックス法によるフェライト系複合材料の作製と電波吸収特性"日本応用磁気学会誌. 26. 818-822 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Nagae: "Grain Growth Control of Dilute Molybdenum-Titanium Alloys by Multi-Step Internal Nitriding"Proc.of the 15^<th> int.Plansee Seminar. Vol.1. 257-266 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 玉井博康: "予備酸化およびスパッタリング金属被覆した窒化アルミニウムセラミックスの耐水性"材料. 50・5. 538-542 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Fujii: "Low-Temperatiure Growth of c-Axis Oriented Y-Type Hexagonal Ferrite Thin Films by the Polymeric Precursor Method"J.Mat.Res.. 16. 2471-2474 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 三木雅道: "ウッドセラミックスの電波吸収体への応用"機能材料. 21. 29-35 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Fujii: "Low-Temperature Growth of c-Axis Oriented Y-Type Hexagonal Ferrite's Films by Polymerized Complex Method"Mat.Res.Soc.Symp.Proc.. Vol.656E. DD451-DD456 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 中西真: "プレセラミックス法によるN-Znフェライト/SiC系複合焼結体の作製と電磁波吸収特性"粉体および粉末冶金. 47巻・8号. 927-930 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Tamai: "Corrosion Behavior of the Electroless Plated Aluminum Nitride in Hydrothermal Enviroment"Ceramic Transactions. 103. 491-501 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Nagae: "Microstructure of Molybdenum Nitride Layer Formed by Nitriding of Molybdenum Metal"Journal of the American Ceramic Society. (in press).

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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