Accurate temperature calibration of differential scanning calorimeters

被引：22

作者：

Skoglund, P ^{[1
]}

Fransson, A ^{[1
]}

机构：

[1] UMEA UNIV,DEPT APPL PHYS & ELECT,S-90187 UMEA,SWEDEN

来源：

THERMOCHIMICA ACTA | 1996年 / 276卷

关键词：

alkanes; calibration; cooling measurements; crystalline-plastic-liquid transition; DSC; liquid-crystals; power-compensated DSC; thermal diffusivity; temperature profiles;

D O I：

10.1016/0040-6031(95)02765-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Power-compensated differential scanning calorimeters are often used in measurements on cooling, In this paper we discuss and present new results on different methods for calibration for cooling, Liquid-crystals have transitions characterized by very little supercooling and are here used for calibration purposes. A difficulty is that the transitions of liquid-crystals usually occur in a narrow temperature range. The temperature range of precise calibration is evaluated for some metals by a method based on reversing the heat flow immediately after the beginning of melting. Further, we investigate the crystalline-plastic-liquid transitions of some alkanes. Finally, we calculate temperature profiles inside two samples of different thermal diffusivity. The results highlight important differences in the temperature distributions in organic and metallic substances under different conditions.

引用

页码：27 / 39

页数：13

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