| NATIONAL STANDARD OF HEAT CAPACITY MEASUREMENT OF SOLIDS IN THE RANGE OF 4.2—90K——AN AUTOMATED ADIABATIC CALORIMETER FROM 25 TO 90K AND MOLAR HEAT CAPACITIES OF α-ALUMINA |
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| 引用本文： | 谭志诚,尹安学,陈淑霞,周立幸,李福学,蔡明忠,张淑珍,潘儒文.NATIONAL STANDARD OF HEAT CAPACITY MEASUREMENT OF SOLIDS IN THE RANGE OF 4.2—90K——AN AUTOMATED ADIABATIC CALORIMETER FROM 25 TO 90K AND MOLAR HEAT CAPACITIES OF α-ALUMINA[J].中国科学B辑(英文版),1991(5). |
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| 作者姓名： | 谭志诚 尹安学 陈淑霞 周立幸 李福学 蔡明忠 张淑珍 潘儒文 |
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| 作者单位： | Dalian Institute of Chemical Physics，Academia Sinica，Dalian 116012，PRC，Dalian Institute of Chemical Physics，Academia Sinica，Dalian 116012，PRC，Dalian Institute of Chemical Physics，Academia Sinica，Dalian 116012，PRC，Dalian Institute of Chemical Physics，Academia Sinica，Dalian 116012，PRC，National Institute of Metrology，Beijing 100013，PRC，National Institute of Metrology，Beijing 100013，PRC，National Institute of Metrology，Beijing 100013，PRC，National Institute of Metrology，Beijing 100013，PRC |
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| 摘 要： | The construction of an automated adiabatic calorimeter for heat capacity measurement ofsolids in the temperature range of 25- 90K is described in detail. The sample vessel of thecalorimeter has thin radial vanes which make no contact with its inner wall and are distrib-uted evenly, thus greatly improving the internal thermal equilibration of the vessel. Theprecision of temperature control for the adiabatic shields and electrical leads of the calori-metric system are heightened to a great extent by using the high precision ACD- 79 modeladiabatic controller specially developed by us for this purpose. Measurements of the heatcapacities of high purity α-Al_2O_3, one of the internationally-accepted standard referencematerials, agree with those of the National Bureau of Standards (NBS), USA within ±0.3%,demonstrating the reliability of this apparatus.
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| 关 键 词： | heat capacity adiabatic calorimeter α-Al_2O_3 low temperature automatic temperaturc control |
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