Highlights
Incroyable flexibilité en Analyse Thermique
Le DSC 404F3 Pegasus®(Analyseur Thermique Différentiel (ATD)) fait parti de la ligne de produit économique NETZSCH série F3 , spécialement conçue pour répondre aux exigences des caractérisations comparatives de matériaux et des contrôles qualité.
Le DSC 404 F3 Pegasus®peut fonctionner entre -150°C et 2000°C avec différents capteurs DSC et ATD facilement interchangeables par l’utilisateur et différents types de four.
La chambre échantillon peut être balayée par des gaz inertes ou oxydants dans le but d’évacuer les gaz émis par l’échantillon.
Le système de mesure est étanche au vide (10-4 mbar).
Method
The DSC 404 F1 as well as the F3 Pegasus® systems operate according to the heat flux principle. With this method, a sample and a reference are subjected to a controlled temperature program (heating, cooling or isothermal). The actual measured properties are the temperature of the sample and the temperature difference between sample and reference. From the raw data signals, the heat flow difference between sample and reference can be determined.
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More on the Functional Principle of a Heat-Flux DSC
A DSC measuring cell consists of a furnace and an integrated heat-flux sensor with designated positions for the sample and reference pans.
The sensor areas are connected to thermocouples or may even be part of the thermocouple. This allows for recording both the temperature difference between the sample and reference side (DSC signal) and the absolute temperature of the sample or reference side.
Due to the heat capacity (cp) of the sample, the reference side (usually an empty pan) generally heats faster than the sample side during heating of the DSC measuring cell; i.e., the reference temperature (TR, green) increases a bit faster than the sample temperature (TP, red). The two curves exhibit parallel behavior during heating at a constant heating rate – until a sample reaction occurs. In the case shown here, the sample starts to melt at t1. The temperature of the sample does not change during melting; the temperature of the reference side, however, remains unaffected and continues exhibiting a linear increase. When melting is completed, the sample temperature also begins to increase again and, beginning with the point in time t2, again exhibits a linear increase.
The differential signal (ΔT) of the two temperature curves is presented in the lower part of the image. In the middle section of the curve, calculation of the differences generates a peak (blue) representing the endothermic melting process. Depending on whether the reference temperature was subtracted from the sample temperature or vice versa during this calculation, the generated peak may point upward or downward in the graphs. The peak area is correlated with the heat content of the transition (enthalpy in J/g).
Specifications
Spécifications Techniques
Gamme de température:
Vitesse de chauffe:
Capteurs de mesure
Thermocouples:
S, E, K, B, W/Re, SProtected, P
Atmosphères:
inerte, oxydante, statique, dynamique
Système OTS®
(option)
Software
Proteus®: Excellent Thermal Analysis Software
The DSC 404 F3 Pegasus® runs under Proteus®Software on Windows®. The Proteus® Software includes everything you need to carry out a measurement and evaluate the resulting data. Through the combination of easy-to-understand menus and automated routines, a tool has been created that is extremely user-friendly and, at the same time, allows sophisticated analysis.The Proteus® software is licensed with the instrument and can of course be installed on other computer systems.
DSC features:
- Determination of onset, peak, inflection and end temperatures
- Automatic peak search
- Transformation enthalpies: analysis of peak areas (enthalpies) with selectable baseline and partial peak area analysis
Complex peak analysis with all characteristic temperatures, area, peak height and half-width - Comprehensive Température de Transition VitreuseThe glass transition is one of the most important properties of amorphous and semi-crystalline materials, e.g., inorganic glasses, amorphous metals, polymers, pharmaceuticals and food ingredients, etc., and describes the temperature region where the mechanical properties of the materials change from hard and brittle to more soft, deformable or rubbery.glass transition analysis
- BeFlat® for Automatic baseline correction (DSC, DTA)
- Degree of crystallinity
- Oxidative-Induction Time (OIT) and Oxidative-Onset Temperature (OOT)Oxidative Induction Time (isothermal OIT) is a relative measure of the resistance of a (stabilized) material to oxidative decomposition. Oxidative-Induction Temperature (dynamic OIT) or Oxidative-Onset Temperature (OOT) is a relative measure of the resistance of a (stabilized) material to oxidative decomposition.OIT (oxidative induction time) evaluation
- Specific Heat Capacity (cp)Heat capacity is a material-specific physical quantity, determined by the amount of heat supplied to specimen, divided by the resulting temperature increase. The specific heat capacity is related to a unit mass of the specimen.Specific heat capacity determination (optional)
- DSC correction: evaluation of exo- and endothermal effects under consideration of system time constants and thermal resistance values (optional)
Further Advanced Software Options
The Proteus® modules and expert software solutions offer further advanced processing of the thermoanalytical data for more sophisticated analyses.
Consultancy & Sales
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Service & Support
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