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首页> 外文期刊>Review of Scientific Instruments >Mathematical treatment of heat flow in differential scanning calorimetry and differential thermal analysis instruments
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Mathematical treatment of heat flow in differential scanning calorimetry and differential thermal analysis instruments

机译：差示扫描量热法和差示热分析仪器中热流的数学处理

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A general mathematical treatment is given which relates the techniques of classical differential thermal analysis, power‐compensated differential scanning calorimetry, and heat‐flux differential scanning calorimetry. An idealized system, representative of almost any type of differential thermal instrument, is presented, which, unlike those of previous treatments, incorporates two separate thermal resistances. This modification allows the heat‐flux d.s.c. instrument to be considered in a unified analysis with the other techniques. General aspects of the idealized system are presented, and the equations governing heat flow within the system are developed. For each separate technique, the components of the idealized system are identified with the actual components of the physical instrument, and the specific equations which describe the measuring principles of that technique are derived. It is shown that a similar type of thermal resistance governs sample‐temperature lag in both the power‐compensated and heat‐flux d.s.c. cases, and the method of estimating the value of this resistance from the slope of a fusion peak is discussed.
机译：给出了与经典差热分析，功率补偿差示扫描量热法和热通量差示扫描量热法技术相关的一般数学处理方法。提出了一种代表几乎所有类型的差热仪器的理想系统，该系统与以前的处理方法不同，它包含两个独立的热阻。此修改允许热通量d.s.c.与其他技术进行统一分析时要考虑的仪器。介绍了理想化系统的一般方面，并开发了控制系统内热流的方程。对于每种单独的技术，理想化系统的组成部分都应与物理仪器的实际组成部分一起识别，并得出描述该技术的测量原理的特定方程式。结果表明，在功率补偿和热通量d.s.c中，类似类型的热阻都控制着样品温度滞后。讨论了从融合峰的斜率估算该电阻值的方法。

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