| 摘要 |
<p>A power compensation differential scanning calorimeter that uses one absolute temperature measurement, two differential temperature measurements, a differential power measurement, and a five-term heat flow equation to measure the sample heat flow. The calorimeter is calibrated by running two sequential calibration experiments. In a preferred embodiment, the first calibration experiment uses empty sample and reference pans, and the second calibration experiment uses sapphire specimens in the sample and reference holders. In an alternate embodiment, sapphire calibration specimens are used in both the first and second calibration experiments. A method for calculating sample heat flow in a Differential Scanning Calorimeter in which the effect of heat storage in the sample pans and the difference in heating rate between sample and reference are included. Accounting for heat flow associated with the pans and the difference between sample and reference heating rate gives a more accurate sample heat flow measurement and improves resolution, which is the ability to separate closely spaced thermal events in the heat flow result. <IMAGE></p> |
