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题名: A small sample-size automated adiabatic calorimeter from 70 to 580 K - Molar heat capacities of alpha-Al2O3
作者: Tan, ZC;  Zhang, JB;  Meng, SH;  Li, L
关键词: adiabatic calorimetry ;  calorimetric technique ;  heat capacity ;  alpha-Al2O3 ;  small sample
刊名: SCIENCE IN CHINA SERIES B-CHEMISTRY
发表日期: 1999-08-01
卷: 42, 期:4, 页:382-390
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: An automatic adiabatic calorimeter for measuring heat capacities in the temperature range 70-580 K, equipped with a small sample cell of 7.4 cm(3) in the internal volume has been developed. In order to obtain a good adiabatic condition of the calorimeter at high temperature, the calorimeter was surrounded in sequence by two adiabatic shields, three radiation shields and an auxiliary temperature-controlled sheath. Toe main body of the cell made of copper and the lid made of brass are silver-soldered and the cell is sealed with a copper screw cap. A sealing gasket made of Pb-Sn ahoy is put between the cap and the lid to ensure a high vacuum sealing of the cell in the whole experimental temperature range. All the leads are insulated and fixed with W30-11 varnish, thus a good electric insulation is obtained at high temperature. All the experimental data, including those for energy and temperature are collected and processed automatically with a personal computer using a predetermined program. To verify the accuracy of the calorimeter, the heat capacities of alpha-Al2O3 of the calorimetric standard reference material is measured. The standard deviations of experimental heat capacity Values from the smoothed values are within +/- 0.28%, while the inaccuracy is within +/- 0.4% compared with those of the National Bureau of Standards over the entire working temperature range.
关键词[WOS]: SYNTHETIC SAPPHIRE ALPHA-AL2O3 ;  LOW-TEMPERATURE CALORIMETER
语种: 英语
WOS记录号: WOS:000082227600007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138533
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
Tan, ZC,Zhang, JB,Meng, SH,et al. A small sample-size automated adiabatic calorimeter from 70 to 580 K - Molar heat capacities of alpha-Al2O3[J]. SCIENCE IN CHINA SERIES B-CHEMISTRY,1999,42(4):382-390.
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