Special Methods

Differential Scanning Calorimetry

Objects of study

Liquid and solid samples in the form of powder, crystals, plates et al.

Applications

Measurement of the specific heat.
Measurement of melting/crystallization temperature and heat.
Phase diagrams determination.
Determination of crystallinity extent of solid samples.

Kinetic study, the measurement of thermal effects in topochemical reactions.
Definition of the samples purity by melting/crystallization temperature and enthalpy.

Instrument facilities

Differential scanning calorimeter DSC 404 C Pegasus (NETZCH Gerätebau GmbH). Temperature range: –120 ... 700 ºC; RT ... 1500 ?C. Heating rate: 0.1–50 K/min. Atmosphere in work chamber: dynamic, oxidative, reducing, inert, vacuum. Precision: < 2.5% for enthalpy changing, ± 3 K for temperature. Sensitivity: 1–10 mcW. Base line linearity < ± 2.5 mW.

Registration forms for results obtained:

time dependence of the rate of heat absorbtion/desorbtion in the sample (mW/g);the data are plotted in real time;
simultaneous record of data in the file that allows to treat it with using software Proteus.

Endothermic melting peak for CaCl2x 6 H2O in alumina pores

Endothermic melting peak for CaCl₂x 6 H₂O in alumina pores. The salt content is 35 % wt.

Samples requirements

The powder and liquid samples in volume not more than 40 mcL.

The crystalline and plate samples are not more than 6 mm in diameter

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