| 摘要 |
A modulated differential scanning calorimeter (MDSC) and a method for practicing MDSC that uses two separate temperature difference signals -- the difference between the temperatures of the sample and reference positions and the difference between the temperatures of the sample position and a base position. This approach accounts for heat flows associated with the sample and reference pans, and for the difference in sample and pan heating rates to provide more accurate heat flow measurement and improve resolution. It also greatly reduces or eliminates the frequency dependence of the heat capacity calibration factor, which allows for the use of shorter modulation periods. Shorter modulation periods allow the use of higher underlying heating rates, allowing users to decrease the duration of their MDSC experiments. <IMAGE> |
