Thermal measuring and testing – Differential thermal analysis – Detail of electrical heating control
Patent
1992-05-26
1993-09-28
Cuchlinski, Jr., William A.
Thermal measuring and testing
Differential thermal analysis
Detail of electrical heating control
374 31, G01N 2500
Patent
active
052481999
ABSTRACT:
The present invention is a spatially-resolved differential analysis technique. A modulated differential analysis technique is applied using a proximal probe to obtain a spatially resolved characterization of a heterogeneous sample comprising at least two phases. As applied to spatially-resolved modulated differential scanning calorimetry, the present invention comprises a thermocouple probe that is scanned over the sample surface. The differential temperature of the area of the sample just beneath the thermocouple probe is obtained with respect to the temperature of a reference. The temperature of the sample and the reference is modulated above and below a transition temperature for one phase of the sample. The signal from the thermocouple probe is deconvoluted to obtain an image of the sample delineating the regions of the sample having that phase.
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Bennett G. Bradley
Cuchlinski Jr. William A.
TA Instruments, Inc.
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