Influence of the emissivity of the sample on differential scanning calorimetry measurements
作者： M.G Wolfinger , J Rath , G Krammer , F Barontini , V Cozzani
DOI: 10.1016/S0040-6031(01)00438-5
关键词: Thermodynamics 、 Crucible 、 Emissivity 、 Thermal analysis 、 Char 、 Chemistry 、 Heat transfer 、 Differential scanning calorimetry 、 Analytical chemistry 、 Graphite 、 Aluminium
摘要: A possible cause of the wide differences present in literature values for calorimetric measurements pyrolysis heat biomass was analyzed. The apparent specific char from beech wood investigated by means a differential scanning calorimeter (DSC). objective to find out influence use lid on crucible experimental results. In first series, containing sample and empty reference were closed pierced lid. second used without Results experiments within same series showed excellent agreement, but results completely different with respect those series. explanation these are emissivities material (aluminium) char. During radiative exchange occurs between two crucibles opposite wall DSC measurement cell. order confirm effect radiation inside measuring cell, additional aluminium oxide graphite carried out.
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