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一级过滤态的模拟和真实DSC的测量技术对比
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| A system of differential equations modeling a heat flux DSC is solved and the results are compared with those obtained using a TA Instruments Q1000TM DSC. It incorporates a new heat flow rate measurement technique that determines the heat flow rate between the sample and its pan. Two types of first-order transitions are investigated: melting of a pure substance and solidification of a pure substance including super-cooling. In both transitions, the peak shape obtained using the new beat flow rate measurement and predicted by the model is quite different from that measured using conventional DSC. It is shown that the differences are the result of simplifications implicit in the conventional heat flow rate measurement that is based solely on the difference between sample and reference calorimeter temperatures. Heat flow rates measured using the improved measurement agree very well with the model predictions for heat exchange between the sample and its pan. |
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2017-01-11 10:51:18, 547.45 K
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