| AN ADIABATIC CALORIMETER FOR HEAT- CAPACITY MEASUREMENTS FROM 80 TO 400K——HEAT CAPACITIES OF a-ALUMINA AND n-HEPTANE |
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| 引用本文： | 谭志诚,周立幸,陈淑霞,尹安学,孙毅,叶锦春,王秀坤.AN ADIABATIC CALORIMETER FOR HEAT- CAPACITY MEASUREMENTS FROM 80 TO 400K——HEAT CAPACITIES OF a-ALUMINA AND n-HEPTANE[J].中国科学B辑(英文版),1983(10). |
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| 作者姓名： | 谭志诚 周立幸 陈淑霞 尹安学 孙毅 叶锦春 王秀坤 |
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| 作者单位： | Dalian Institute of Chemical Physics，Academia Sinica，Dalian，Dalian Institute of Chemical Physics，Academia Sinica，Dalian，Dalian Institute of Chemical Physics，Academia Sinica，Dalian，Dalian Institute of Chemical Physics，Academia Sinica，Dalian，Dalian Institute of Chemical Physics，Academia Sinica，Dalian，Dalian Institute of Chemical Physics，Academia Sinica，Dalian，Dalian Institute of Chemical Physics，Academia Sinica，Dalian |
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| 摘 要： | An improved automatic adiabatic calorimeter for precision measurement of heat capacities of solid and liquid phases in the temperature range 80-400 K is described. Temperature control of the shield and electrical energy measurement are automated; data processing is performed by an electronic computer. The calorimeter proper has thin L-shaped vanes which make no contact with its inner wall and a device for helium filling, which greatly improves the internal thermal equilibration and effectively reduces the surface temperature gradient. Measurements of the heat capacities of a-alumina and n-heptane, two internationally accepted heat-capacity standards, show a precision of±0.1%, agree with those of the National Bureau of Standards (NBS) within ±0.2%, and demonstrate the reliability of the apparatus.
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