Abstract
This article presents the results of investigations into the influence of sample mass and particle size on the area of the DTA peak in the differential thermal analysis (DTA) of powdered materials. It was established that for a cylindrical sample, the area of the DTA peak increases linearly with the increase in sample mass up to a certain limit beyond which the linearity breaks down. With further increase in the mass of the sample, the area of the DTA peak increases linearly even further but the straight line obtained has a much smaller slope. A relationship is established between the maximum sample mass, up to which the initial linear relationship of S = f( m) is valid, and the average particle diameter of powder materials studied. This relationship raises the possibility that, based on the average particle diameter of the sample studied, the maximum sample mass usable in quantitative DTA, can be predetermined.
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