high temperature calorimetry - comtes fht · high temperature calorimetry differential scanning...

HIGH TEMPERATURE CALORIMETRY

DIFFERENTIAL SCANNING CALORIMETRY

COMTES FHT a.s., Průmyslová 995, 334 41 Dobřany, www.comtesfht.cz

Differential Scanning Calorimetry (DSC) is the most popular ther-mal analysis technique for

• research and development • quality management • failure analysis, and • process optimization

It measures endothermic and exothermic transitions as a func-

tion of temperature. Transitions measuremend include Tg, mel-

ting, crystallization, curing and cure kinetics, onset of oxidation

and heat capacity.

TECHNICAL SPECIFICATIONMEASUREMENT PRINCIPLE

LINSEIS High Temperature DSC HDSC PT1600

• Temperature range RT up to 1400 °C

• Heating and cooling rates 0,1 up to 50 °C/min

• Temperature accuracy +/-0,5 °C

• Resolution 0,3 μW

• Atmospheres inert• Vacuum 10-2 Pa• Crucibles Al

2O

3 0,12 ml, Platinum 0,12 ml

The temperature of the sample unit, formed by

sample and reference material, is varied in a spe-

cific program and the temperture difference be-

tween the sample and the reference material is measured as a function of temperature.

APPLICATION EXAMPLES

• Enthalpy, melting energy

• Specific heat• Glass point

• Thermal stability• Oxidation stability

• Purity• Phase transformation

temperature• Solidus/Liquidus relationship

• Eutecticum• Polymorph transformations

0,0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

0 200 400 600 800 1000 1200

Enth

alpy

H

[MJ×

kg-1

]

Spec

ific

heat

[kJ×

kg-1

K-1

]

Temperature [°C]

Specific heat and enthalpy of iron

specific heattransformationenthalpy

912°Ctransition

H = 16,116 kJ kg-1

Curie's point