High Speed Temperature Scanner (HSTS-1 & HSTS-2)

High Speed Temperature Scanner (HSTS-1 & HSTS-2)

Main characteristics of the HSTS equipment

 

HSTS-1

HSTS-2

HSTS-3

Heater

Ni foil with 100mkm thickness

Carbon strip

Temperature range

20¸1300 օC

20¸2000 օC

Heating rate

up to 7500 օ/min

10¸10000 օ/min

Cooling rate

up to 12000 օ/min

up to 30000 օ/min

Gas pressure

10-5¸1 atm

10-5¸10 atm

Frequency

50 Hz

Appearance of Samples

powder

thin pellet (50 mg) with a diameter of 1x5 mm

Mass of sample

5-50 mg

5-100 mg

The HSTS-1 and HSTS-2 operations are based on the direct electric heating of thin metallic foil heater, where the small amount of powder is placed inside the middle part of the nickel envelope. And in case of the HSTS-3 model, the sample in the form of a thin pellet is placed in a carbon strip heater.

The heating takes place 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, practically excluding possible interactions over the cooling stage.