Thermal measuring and testing – Differential thermal analysis
Patent
1985-01-14
1986-08-19
Frankfort, Charles E.
Thermal measuring and testing
Differential thermal analysis
374 12, 374 14, G01N 2500
Patent
active
046066497
ABSTRACT:
A modification to thermogravimetric analyzers with data acquisition devised to allow concurrent TG (thermogravimetry) and DTA (differential thermal analysis) measurements employs three samples mounted close to each other in a TG furnace. Two of the samples are active ones, i.e. of the material to be analyzed, and the third is a reference sample of an inert material. The first active sample is suspended from the beam of a thermobalance. The change in weight of this sample is recorded and plotted versus the temperature of the second active sample. The sample thermocouple and another identical thermocouple are placed in contact with crucibles containing the second active sample and the reference material, respectively. The differential temperature between the sample and the reference material is taken from the two identical thermocouples. The differential signal is amplified and plotted against the temperature of the second active sample. The two active samples are substantially identical to each other in geometry, i.e. amount and shape.
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Frankfort Charles E.
Her Majesty the Queen in right of Canada as represented by the
Will Thomas B.
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