论文部分内容阅读
本文详细描述了用于80～370 K温区内精密测定固体和液体物质热容的自动绝热量热装置。其中热屏绝热控温和样品加热计时均实现了自动化,全部操作可由一人单独完成。通过测定国际量热学会议所推荐的两种标准物质α-Al_2O_3和正庚烷的热容,证实了装置的可靠性;在全部实验温区内本文结果与美国标准局数据符合在±0.30％以内,测试精密度为±0.04％。
This paper describes in detail the automatic adiabatic calorimeter for the precise determination of the heat capacities of solid and liquid substances in the temperature range of 80 to 370 K. One of the hot-screen adiabatic temperature control and sample heating timing have been automated, all operations can be done alone by one person. The reliability of the device was confirmed by measuring the heat capacities of α-Al_2O_3 and n-heptane, two standard materials recommended by the International Symposium on Thermal Analysis. The results of this paper are within ± 0.30% of those of the American Bureau of Standards in all the experimental temperature ranges. The test precision is ± 0.04%.