Abstract
A simplified isoperibol calorimetry method for measuring specific heat in
solids is described. Taking advantage of the classical Nernst dependency
the specific heat is calculated from time-domain temperature curves
registered for a sample forced heating and natural cooling phase. In order
to improve accuracy of the measurements a correction factor, taking into
account the heat transferred to the surrounding, is introduced along with
a procedure of statistical elimination of unavoidable measurement
deviations. The method is implemented in a simple and straightforward
measuring system involving no vacuum calorimeter. The method is applicable
for quick and routine specific heat measurements performed on small solid
dielectric or metallic specimens at near-room temperature. Test results of
various materials used commonly in electrical engineering are demonstrated
and discussed as well as comparison to drop calorimetry and differential
scanning calorimetry reference measurements is included. The overall
repeatability of the test method and the simplified apparatus is estimated
as not worse than 2.6%.
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