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高圧下での単結晶ー単結晶転移の誘起と高圧相の結晶学的性質の研究

Research Project

Project/Area Number 60540209
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionHiroshima University

Principal Investigator

NOMURA Motoyuki  Department of Materials Science, Faculty of Science, Lecturer, 理学部, 講師 (00033837)

Co-Investigator(Kenkyū-buntansha) FUJIWARA Hiroshi  Department of Materials Science, Faculty of Science, Professor, 理学部, 教授 (20033798)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1986: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1985: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsPhase transformation / Alkali halide / high pressure / potassium iodide / Rubidium chloride / 塩化ルビジウム / 相転移の中断 / ダイヤモンドアニビル / 単結晶-単結晶転移 / 塩化カリウム
Research Abstract

It was found that the pressure-increasing rate is one of the important fac-tors so as to induce the single-crystal to single-crystal transformation. At the most favorable rate for the above-mentioned phase transformation the obser-vation of the internal structure of the crystal was intended in the course of the transformation. As the in situ observation of the process of the phase transformation is technically difficutl, the transformation was interrupted and the surface and the fracture plane of the retrieved specimen to the ambient pressure was observed by means of the microscope for potassium iodide. Accord-ing to the microscope observations the structure of the fracture plane was dif-ferent in the inner part and the outer of the specimen. The former was transparent and relatively cleavable. The latter part, however, was opaque and the cleavableness was lost at all, indicating that this part was retrieved from B2, the high pressure phase. This result, therefore, suggests that the phase transfomation proceeds from the outer part to the inner part centripetally. In order to obtain more detailed information concerning the mechanism of the phase transformation the in situ observation of the process of the phase transforma-tion is indispensable. For the achievement of this purpose the precise pres-sure-controlling system for the diamond anvil was built. According to the pres-liminary result obtained by the use of the new apparatus the above- mentioned process of the phase transformation was confirmed with the miscroscope observa-tion.

Report

(2 results)
  • 1988 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Motoyuki NOMURA;Saiko NEGISHI;Yoji OKANO;Hiroshi FUJIWARA: J.Phys.Soc.Jpn.57. 1341-1343 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Motoyuki NOMURA;Yoji OKANO;Hiroshi FUJIWARA: Jpn.J.Appl.Phys.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Motoyuki NOMURA,; Saiko NEGISHI,; Yoji OKAMOTO,; Hiroshi FUJIWARA.: "Observation of the Fracture Plane of Potassium Iodide Formed at the Pressure-Induced Phase Transition" J. Phys. Soc. Jpn.57. 1341-1343 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Motoyuki NOMURA,; Yoji OKANO,; Hiroshi FUJIWARA.: "Precise Pressure-Controlling System for the Diamond Anvil" Jpn. J. Appl. Phys.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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