High Speed Temperature Scanner (HSTS-1 & HSTS-2)
- Heating rates of samples can be varied from 10 to 10000 °C/min with the temperature range of scanning.
- Experiments can be stopped automatically at a given time or temperature with subsequent fast cooling of samples.
- The instrument can be operated in vacuum, air, and inert gas at P ≤ 1 atm (static conditions).
In HSTS setup the reactive powder mixture is placed into the thin nickel foil envelope (0.05 - 0.1 mm thickness). The foil heater heats by electric current with scheduled temperature-time profile provided by PC-assisted controller. Typical heating curve for the inert experiment demonstrates linear behavior, while ascents and descents appear on the reactive profile. The deviations are indicating exo- or endothermic processes proceeding in the reactive mixture. The reaction onset temperature (To), the maximum peak temperature observed during self-heating (Tmax) and the temperature prescribed by linear heating, where the maximum exothermic effect is observed (T*), are determined from the heating curves.
The setup allows to automatically interrupt the process by switching off the electric current at different characteristic stages. Thereupon, high cooling rates are achieved (up to 12000 oC/min), practically excluding possible interactions over the cooling stage.