Construction of an adiabatic high-pressure calorimeter using helium gas for pressurization.
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概要
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A novel adiabatic high-pressure calorimeter was constructed with using helium gas as a pressure transmitting medium. It works under a constant pressure up to 250 MPa in the temperature range from 12 to 370 K. Sample cell is made of Be–Cu alloy and has internal volume of 26 cm<SUP>3</SUP>. The pressure transmitting tube is connected to an external pressure-control system, which enables to keep automatically the inner pressure constant within ±1 kPa over the whole pressure and temperature ranges. Thus the thermodynamic path that any specimen follows during the heat capacity measurement can be described unambiguously. Heat capacities of the sample cells loaded without and with 158.9 MPa He gas were measured in the temperature range from 25 to 370 K. The imprecision of heat capacity data of the compressed He gas was within 0.3%. Thus the present calorimeter enables us to extend the low-temperature thermodynamic study on various kinds of materials to high pressures without a significant loss of the claimed precision.
- 公益社団法人 日本化学会の論文
著者
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Yamamuro Osamu
Department Of Chemistry And The Microcalorimetry Research Center Graduate School Of Science Osaka Un
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Suga Hiroshi
Department Of Chemistry Faculty Of Science Osaka University
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MATSUO Takasuke
Department of Chemistry and Microcalorimetry Research Center, Faculty of Science, Osaka University
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Oguni Masaharu
Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University
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Matsuo Takasuke
Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University
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Yamamuro Osamu
Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University
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Suga Hiroshi
Department of Chemistry and Chemical Thermodynamics Laboratory, Faculty of Science, Osaka University
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