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1999 Fiscal Year Final Research Report Summary

Formation Mechanism and In-situ Observation of Chemically Induced Formation Dynamics of Grain Boundary in Electro-ceramics

Research Project

Project/Area Number 09450242
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionTokyo Institute of Technology

Principal Investigator

MIZUTANI Nobuyasu  Tokyo Institute of Technology, Faculty of Engineering, Professor, 大学院・理工学研究科, 教授 (60016558)

Co-Investigator(Kenkyū-buntansha) WAKIYA Naoki  Tokyo Institute of Technology, Faculty of Engineering, Research Associate, 大学院・理工学研究科, 助手 (40251623)
SHINOZAKI Kazuo  Tokyo Institute of Technology, Faculty of Engineering, Associate Professor, 大学院・理工学研究科, 助教授 (00196388)
Project Period (FY) 1997 – 1999
Keywordselectroceramics / microstructure / liquid phase / grain boundary / thin film / varistor / zinc oxide / zirconium oxide
Research Abstract

In the field of electro-ceramics, the liquid phase sintering techniques are used frequently in order to manufacture many ceramic chips at lower temperature. However, the phenomena including property change and appearance of electronic function beside only sintering behavior have not been studied.
In this research, mainly the formation mechanism of grain boundary layer having different chemical constituent and structure with grain was studied on the point of chemical dynamics.
(1) Establishment of the detailed phase diagram of ZnO-PrOィイD22-xィエD2 system up to 1600℃
(2) The ZnO-PrOィイD22-xィエD2 system has no solid solution region and one eutectic point at 1328℃.
(3) By addition of CoO, the liquidous temperature decresed to 1280℃.
(4) The state of liquid phase in grain boundaries changed strongly with oxygen pressure.
(5) By infilutration of PrOィイD22-xィエD2 to grain boundary region from the surface of pure ZnO sintered body, the good varisor wag formed.
Through this study, we discussed the role of liquid phase to appearance of properties, etc. from the view point of chemical formation of grain boundary

  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Sung-Yong Chun: "Electrically active grain boundaries in ZnO varistors by liquid-infiltration"J. of Materials Science : Materials in Electronics II,. 11. 73-80 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Naoki Wakiya: "Redox Reaction of Praseodymium Oxide in the ZnO Sintered Ceramics"J. of Solid State Chemistry. 149. 349-353 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tung-Jung Wu: "Reduction of Leakage Current in PbTiO_3 Film Fabricated by MOCVD"Key Engineering Materials (Electroceramics in Japan II). 167-170. 123-126 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A. Saiki: "Charge Transfer between Oxygen and Zirconia"J. of Thermal Analysis and Calorimetry. 57. 875-881 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sung-Yong Chun: "Formation of Varistor Characteristics by the Grain-Boundary Penetration of ZnO-PrO_x Liquid into ZnO Ceramics"J. A. Ceram. Soc,. 82. 3065-3068 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sung-Yong Chun: "Investigation of the solidus boundaries and microstructure in the ZnO-PrO _<1. 5>-CoO system"J. Mater. Res.. 13. 2110-2116 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Naoki Wakiya: "Influence of atmosphere on phase transitions of praseodymium oxide at high temperature using high temperature X-ray diffraction and thermogravimetry"Thermochimica Acta. 55-61 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 桜井修: "半導性SrTiO_3単結晶接合界面の微構造と酸化還元処理によるI-V特性の変化"J.Ceram.Soc.Japan. 106. 308-311 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 篠崎和夫: "AINセラミックスにおける液相生成と焼結機構"ニューセラミックス. 11. 19-25 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 篠崎和夫: "窒化アルミニウムセラミックスにおける液相生成と焼結機構"Fine Ceramics Report. 15. 244-249 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sung-Yong Chun: "Phase Diagram and Microstructure in the ZnO-Pr _2 O _3 System"J. Am. Ceram. Soc.. 80. 995-998 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] kazuo Shinozaki: "Liquid Phase Formation and its Migration in Aluminum Nitride Ceramics"Ceramic Transactions of the Am. Ceram. Soc.. 71. 307-321 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 篠崎和夫: "微量液相焼結による電子セラミックスの機能発現"セラミックスデータブック`99工業と製品. 27. 185-189 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sung-Yong Chun: "Electrically active grain boundaries in ZnO varistors by liquid-infiltration method"J. of Materials Science : Materials in Electronic II. 11. 73-80 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Naoki Wakiya, Sung-Yong Chun, Kazuo Shinozaki and Nobuyasu Mizutani: "Redox Reaction of Praseodymium Oxide in the ZnO Sintered Ceramics"J. of Solid State Chemistry. 149. 349-353 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tung-Jung Wu, Hiroshi Uchida, Osamu Sakurai, and Nobuyasu Mizutani: "Reduction of Leakage Current in PbTiOィイD23ィエD2 Film Fabricated by MOCVD"Key Engineering Materials (Electroceramics in Japan II). 169-170. 123-126 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A. Sakai, H. Funakubo, N. Mizutani, K. Shinozaki, T. Bak, J. Nowotny, M. Rekas and C. C. Sorrel: "Charge Transfer between Oxygen and Zirconia"J. of Thermal Analysis and Calorimetry. 57. 875-881 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sung-Yong Chun, Kazuo Shinozaki and Nobuyasu Mizutani: "Formation of Varistor Characteristics by the Grain-boundary Penetration of ZnO-PrOィイD2xィエD2 Liquid in to ZnO Ceramics"J. A. Ceram. Soc.. 82[11]. 3065-68 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sung-Yong Chun, Naoki Wakita, Kazuo Shinozaki and Nobuyasu Mizutani: "Investigation of the solidus boundaries and microstructure in the ZnO-PrOィイD21.5ィエD2-CoO system"J. Mater. Res.. 13[8]. 2110-2116 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Naoki Wakiya, Sung-Yong Chun, Atsushi Saiki, Osamu Sakurai, Kazuo Shinozaki and Nobuyasu Mizutani: "Influence of atmosphere on phase transitions of praseodymium oxide at high temperature using high temperature X-ray diffraction and thermogravimetry"Thermochimica Acta. [313]. 55-61 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] O. Sakurai, M. Soeda, A. Saiki, K. Shinozaki and N. Mizutani: "Microstructure and change of I-V characteristics by redox treatment of the junction interface of semiconductive SrTiOィイD23ィエD2 single crystal"J. Ceram. Soc. Japan. 106[3]. 308-311 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo Shinozaki and Nobuyasu Mizutani: "Sintering mechanism and liquid phase formation of AIN ceramics"New Ceramics. 11[9]. 19-25 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo Shinozaki, Nobuyasu Mizutani and Yutaka Sawada: "Sintering mechanism and liquid phase formation of aluminum nitride ceramics"Fine Ceramics Report. 15[11]. 244-249 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sung-Yong Chun, Naoki Wakita, Hiroshi funakubo, Kazuo Shinozaki and Nobuyasu Mizutani: "Phase Diagram and Microstructure in the ZnO-PrィイD22ィエD2OィイD23ィエD2 System"J. Am. Ceram. Soc.. 80[4]. 995-998 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo Shinozaki, Yutada Sawada and Nobuyasu Mizutani: "Liquid Phase Formation and its Migration in Aluminum Nitride Ceramics"Ceramic Transactions of the Am. Ceram. Soc.. 71. 307-321 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuo Shinozaki and Nobuyasu Mizutani: "Development of valuable function in electroceramics by the liquid phase sintering having a small amount of liquid"Ceramic Databook. 27[81]. 185-189 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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