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Pressure dependence of crystal growth mechanism

Research Project

Project/Area Number 04680052
Research Category

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

Allocation TypeSingle-year Grants
Research Field 結晶学
Research InstitutionUniversity of Tsukuba

Principal Investigator

TAKANO K.J.  University of Tsukuba, Institute of materials Science, Associtate Prof, 物質工学系, 助教授 (60133005)

Co-Investigator(Kenkyū-buntansha) WAKATSUKI M.  University of Tsukuba, Institute of materials Science, Prof., 物質工学系, 教授 (50114153)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordscrystal Growth / high Pressure / interfacial tension / paraxylene / 成長形 / サーマル・ラフニング / 溶解エンタルピー / 状態方程式 / ベンゼン / ナフタレン / ラフニング転移
Research Abstract

The pressure, temperature, and concentration dependence of nucleation was observed with the p-and m-xylene binary system using an optical liquid high pressure cell. The deduced interfacial tension increased with increasing pressure and with decreasing p-xylene content. The interfacial tension decreased with increasing temperature.
The new instrument detecting the volume of sample at high pressure was developed. With the instrument, the equations of state of p-xylene both in liquid and solid state were measured partially. The pressure and temperature dependence of the energy change of dissolution was deduced with the volume change of the liquid to solid phase transition and the other thermodynamical quantities measured in this study.
The mechanism giving the pressure dependence to the interfacial tension was examined with the above mentioned thermodynamical quantities, which gives the following figure. The pressure dependence arises from both the increase of breaking bond energy by compression and the decrease of the interfacial excess entropy by compression.

Report

(3 results)
  • 1997 Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] K.J.TAKANO.M.WAKATSUKI: "Development of an optical liquid high Pressure cell and its application to visual observation of Pressure-driven crystal Growth." J.Crystal Growth. 171. 591-600 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.J.TAKANO: "Pressure dependence of interfacial tension" J.Crystal Growth. (投稿準備中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.J.TAKANO,M.WAKATSUKI: "Development of an optical liquid high Pressure cell and its application to visual observation of Pressure-driven crystal Growth"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Wakatsuki,K.J.Takano,H.Kagi and S.Kumagai: "Real-time evaluation of pressure using the pressure effect on emf of thermocouples" Proc.14th AIRAPT International Conf.on High Pressure Science and Technology(Joint with 1993 APS Topical Conf.),Colorado,1993. (印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] K.J.Takano,K.Shino,A.Izawa,M.Miyahara and M.Wakatsuki: "Detection of a pressure-induced phase transition in a diamond anvil cell" Japan.J.Appl.Phys.31(3A). 1268-1274 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Wakatsuki,K.J.Takano and H.Kagi: "New Functionality Materials,Vol.C,ed.by T.Tsuruta,M.Doyama and M.Seno(Formation process of materials at high pressureの部分を担当)" Elsevier,Amsterdam, 776(91-98) (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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