Simultaneous Thermal Analysis
Thermogravimetric Analyzer TGA + Differential Scanning Calorimeter DSC
The simultaneous measurement of the weight change (thermogravimetry) and the energy conversion (differential scanning calorimetry) on a single sample (Simultaneous Thermal Analysis – STA) provides a large gain in information compared to an application in two different devices.
This means that the same test conditions apply at all times for the TGA and DTA/DSC signals (atmosphere, heating rate, thermal contact, radiation, etc.).
Typical applications are the differentiation between phase transformations and decomposition, pyrolysis, oxidation, combustion, etc.
The LINSEIS STA series (Simultaneous Thermal Analysis) models are used to simultaneously measure the changes in mass (TG) and the caloric reactions (DSC) of a sample in a temperature range from -150°C up to 2400°C.
The STA Platinum series was developed to meet these requirements at both high and low temperatures.
A range of sophisticated furnace types and a large selection of sample holders and crucibles are available.
You can also order various accessories such as gas mixing systems, gas analyzers and gas safety system as well as our extensive range of software to use.
Simultaneous TGA-DTA/DSC measures both the heat flow (DSC) and the weight change (TGA) of a sample as a function of temperature or time under controlled atmosphere.
The simultaneous measurement of these two material properties not only improves productivity, but also simplifies the interpretation of the results.
The complementary information obtained in this way makes it possible to distinguish between endothermic and exothermic processes that are not associated with a change in weight (e.g. melting and crystallization) and those that involve a change in weight (e.g. degradation).
Linseis STA series
STA MSB PT 1
Extensions
Gas Safety System
Are you interested in a STA measuring device?
Would you like to carry out a
sample measurement?
Contact us today!
Sebastian
Phone: +1 (609) 223 2070
+49 (0) 9287/880 0
info[at]linseis.de
More comprehensive information:
STA (Simultaneous Thermal Analysis) provides more useful information than using the DSC or TGA technique alone.
It combines thermogravimetry (TGA) with either differential scanning calorimetry (DSC) or differential thermal analysis (DTA), providing a more comprehensive insight into the thermal stability, reactivity and composition of materials.
Improved accuracy:
STA compensates for uncertainties in separate TGA and DTA/DSC measurements caused by sample inhomogeneities, sample geometry and temperature inaccuracies.
This leads to more accurate and reliable results.
Time efficiency:
Performing TGA and DSC simultaneously saves time compared to performing the techniques in parallel or sequentially.
This is particularly advantageous when analyzing a wide range of materials and reactions.
Identical test conditions:
With the STA, the test conditions for the TGA and DSC signals are completely identical, including the atmosphere, gas flow rate, heating rate and thermal contact with the crucible and sensor.
This ensures consistency and reliability in the measurements.
Differentiation of reactions:
STA makes it possible to distinguish between endothermic and exothermic reactions, which may not be distinguishable when using individual techniques.
For example, DSC easily distinguishes between endothermic and exothermic processes, while TGA can generate similar signals for different reactions
Measured variables and effects at a glance:
– Enthalpy, melting energy
– Specific heat capacity
– Glass transition point
– Crystallinity
– Enthalpy of reaction
– Thermal stability
– Oxidation stability
– Ageing processes
– Purity analysis
– Phase transformations
– Solid / liquid correlations
– Eutecticum
– Polymorphism
– Sample identification
– Mass changes
High-precision beam scale
Our various microbalances are specially designed to fulfill thermal analysis tasks in the best possible way.
They offer an ultra-lightweight design to enable rapid weight changes and a symmetrical construction for extremely low-drift long-term measurements.
Advantages of the LINSEIS scale design
– Compensation of the sample mass by a counterweight enables improved sensitivity
– Improved symmetrical design for high interference levels
– No influence from local gravity
– No influence from thermal fluctuations
– Highest possible precision
– The concept enables easy maintenance
– Depending on the model, the balance can process sample masses from mg up to 50g
Advantages of the combination of TG + DSC
– Same geometry
– Same temperature profile
– Same atmosphere
– Same humidity
DSC heat flow measurement
Dynamic differential
calorimetry (DSC)
A method in which the difference between the energy input to a substance and a reference material is measured as a function of temperature while the substance and reference material are subjected to a controlled temperature program.
Difference signal
The difference signal is displayed as a baseline.
Effects, for example the melting of a metal, can be observed as a peak.
The area of the peak indicates the amount of enthalpy and the direction of the peak indicates the type of heat flow – endothermic (downward) or exothermic (upward).
Temperature vs. time
In the case of an effect such as a reaction, decomposition or phase transition, a temperature difference (heat flow difference) between the sample and the reference crucible can be measured using a thermocouple.
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