AN AUTOMATED ADIABATIC CALORIMETER FOR THE TEMPERATURE-RANGE 13-K TO 530-K - THE HEAT-CAPACITIES OF BENZOIC-ACID FROM 15-K TO 305-K AND OF SYNTHETIC SAPPHIRE FROM 60-K TO 505-K

被引：65

作者：

SORAI, M

KAJI, K

KANEKO, Y

机构：

[1] Microcalorimetry Research Center, Faculty of Science, Osaka University, Toyonaka, Osaka

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 1992年 / 24卷 / 02期

关键词：

D O I：

10.1016/S0021-9614(05)80046-1

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Construction of a fully automated adiabatic heat-capacity calorimeter which has been successfully operated at temperatures from 13 K to 530 K is reported. This calorimeter has been designed specially so as remarkably to economize liquid helium: 7 dm3 of liquid helium was enough to cool the apparatus from 77 K to 10 K and to measure heat capacities from 13 K upwards. Its performance has been examined by measurements on the standard reference materials: benzoic acid (NBS SRM39i) from 15 K to 305 K and synthetic sapphire (α-Al2O3: NBS SRM720) from 60 K to 505 K. The results are compared with those of other investigators. Overall precision assessed as deviations from a smoothed curve is within ±0.0005·Cp or better, while the inaccuracy is within ±0.0025·Cp except for the temperature regions below about 25 K and above about 400 K. © 1992 Academic Press Limited All rights reserved.

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页码：167 / 180

页数：14

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