Abstract
The authors investigated the effect of the shape of solid sample on the specific heat measurement using differential scanning calorimeter. Samples were two synthetic sapphire disks 3.5mm in diameter, alumina particles 75μm in particle size and the composite material made mostly from plastic waste and fly ash. The granular sample of the composite, which was grated, had a maximum grain size of about 0.5mm. The surface of sheet sample of the composite was polished with the sandpaper. The reproducibility of the data for the disk and sheet samples was better than those for the granular sample. The measurement accuracy was affected by the heat transfer inside the sample and at the boundary between the sample and capsule surfaces.
