Thermal measuring and testing – Differential thermal analysis – Detail of electrical heating control
Patent
1993-12-22
1995-08-08
Will, Thomas B.
Thermal measuring and testing
Differential thermal analysis
Detail of electrical heating control
374 33, 374 43, G01N 2500
Patent
active
054392918
ABSTRACT:
The present invention is a modulated differential thermal analysis technique for determining the composition, phase, structure, identification, or other properties of a material that undergoes a transition as function of temperature or other driving variable. As applied to differential scanning calorimetric analysis (DSC), the preferred embodiment comprises (1) heating a sample of the material with a linear temperature ramp that is modulated with a sinusoidal heating rate oscillation; (2) simultaneously heating a reference at the same linear temperature ramp; (3) measuring the differential temperature of the sample and reference; and (4) deconvoluting the resultant heat flow signal into rapidly and non-rapidly reversible components.
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Bennett G. Bradley
TA Instruments, Inc.
Will Thomas B.
LandOfFree
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