Dynamic DSC (STA)

This method involves applying a sine-wave modulation to the traditional constant heating rate during measurements. By using this feature, specific heat measurements^*1 up to 1500°C^*2 can be easily conducted. The DTA data is energy-calibrated and converted into DSC data before performing dynamic DSC analysis.
Compatible with STA8122 and later models.

Dynamic DSC Measurement Example of TG-DSC

Sample: Silica (SiO₂), powder
Heating rate: 5°C /min, Cycle: 60 sec, Amplitude: 2°C

Quartz is stable as α-quartz at room temperature and pressure, but it is known to undergo a phase change to β-quartz as follows when the temperature changes:

α-quartz → 573°C → β-quartz

The dynamic DSC function of TG-DTA/DSC enables measurement of specific heat capacity (Cp) over a wide temperature range, which could not be measured with conventional DSC.

*1  This method does not support the separation of reversible and irreversible components (specific heat measurement only).

*2  Maximum heating temperature depends on the specifications of the electric furnace.

*3  The modulation period can be set from 5 seconds, but for periods shorter than 40 seconds, temperature control may not be achievable.

*4  Compatible furnace: resistance furnace (standard type/high temperature type)