DSC (Differential Scanning Calorimetry)
Instrument Perkin-Elmer
DSC7
Samples - solids (bulks, ribbons, powders) or viscous liquids of ~ 10 mg mass
T, Temperature region - from 0 oC up to 600 oC (up to700 oC in Pt pans)
w, Heating/cooling rate - from 0 up to 200 oC/min
Atmosphere – dynamic argon, nitrogen, oxygen, air
Investigated subjects, generally
Thermodynamic stability of the samples
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· Temperatures of the phase transformations (+/- 0.5 oC)
· Heats of the phase trasnsformations (+/- 2 J/g)
Kinetics of phase transformations in the samples
· Kinetic equations
· Activation energies
· Other kinetic parameters (e.g. pre-exponential factors, Avrami exponents)
Investigated subjects, especially
Kinetics of structural relaxation in glasses
Kinetics of
crystallization in glasses (exclusively in metallic glasses), see Methods of
Kinetic Analysis
Methods of Kinetic Analysis
Isoconversional isothermal and continuous heating methods (expanded Friedman or Friedman-Gupta methods)
Isothermal Avrami and Arrhenius linearization methods
Suriñach-Illeková curve fitting method
Numerical non-linear curve fitting method