Differential thermal analyzer
AssigneeSeiko Instruments Inc.
InventorsNobutaka Nakamura, Rintaro Nakatani, Ryoichi Kinoshita
Life of this patent
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Abstract
The DSC (DTA) signal waveform measured under an experimental heating rate condition is separated into a base line and individual basic peak elements, and the respective activation energies are calculated corresponding to each of basic peak elements separated. A DSC (DTA) signal that should be obtained at an another heating rate is estimated from the data obtained from the experimental heating rate and it is outputted. In this process, the temperature shift caused by heating rate difference is corrected using the values of activation energies obtained.
Claims16
A differential thermal analyzer comprising:
- means for outputting a sample temperature signal and a differential thermal analysis signal representative of at least one of a differential change in temperature difference and a heat flow difference of a sample relative to a reference substance by heating the sample and the reference substance at an experimental heating rate;
- and processing means for processing the sample temperature signal and the differential thermal analysis signal obtained during thermal analysis of the sample, the processing means including separating means for separating the differential thermal analysis signal into a peak component and a baseline component, an activation energy calculator for calculating an activation energy based on the peak component of the differential thermal analysis signal, and a heating rate converter for calculating an estimated differential thermal analysis signal that would be obtained under a thermal analysis of the sample conducted at a desired heating rate different from the experimental heating rate based on the experimental heating rate and the activation energy obtained by the activation energy calculator, the estimated differential thermal analysis signal that should be obtained at the desired heating rate being calculated based on the differential thermal analysis signal derived from the experimental heating rate.
A differential thermal analyzer comprising:
- means for outputting a sample temperature signal and a differential thermal analysis signal representative of at least one of a differential change in temperature difference and a heat flow difference of a sample relative to a reference substance by heating the sample and the reference substance at an experimental heating rate;
- and processing means for processing measured data obtained during the thermal analysis, the processing means including separating means for separating the differential thermal analysis signal into a peak component and a baseline component, a separator for separating the peak component into a plurality of peak elements, an activation energy calculator for calculating an activation energy for each of the respective peak elements separated by the separator, and a heating rate converter for calculating an estimated differential thermal analysis signal that would be obtained under a thermal analysis of the sample conducted at a desired heating rate different from the experimental heating rate based on the experimental heating rate and the activation energy obtained by the activation energy calculator, the estimated differential thermal analysis signal that should be obtained at the desired heating rate being calculated based on the differential thermal analysis signal derived from the experimental heating rate.
Dependencies are inferred from the claim text.