Differential Thermal Analysis – DTA
Differential Thermal Analysis (DTA) utilizes characteristic energy changes during phase transitions for qualitative and quantitative analysis of materials.
Differential Thermal Analysis
Measurement Setups for Differential Thermal Analysis (DTA)
Differential thermal analysis (DTA) is a widely used method for analyzing materials. DTA utilizes the fact of a characteristic energy conversion during phase transitions for qualitative and quantitative analysis. The measurement is based on a comparison of the sample temperature with a reference. The devices are used to characterize pharmaceuticals, food, chemicals and inorganic substances. Typically effects like glass transitions, crystallization, melting and sublimation can be measured.
The modular concept of DTA systems enables coverage of a temperature range from -150°C to 2400°C using various furnaces, measuring systems and crucibles.
Due to the vacuum-tight design, measurements of the enthalpy under the cleanest atmospheres and under a vacuum up to 10E-5 mbar are possible. In addition, the systems can be equipped with a mass spectrometer or FTIR to obtain further information.
All DTA devices operate in accordance with the following national and international standards ASTM C 351, D 3417, D 3418, D 3895, D 4565, E 793, E 794, DIN 51004, DIN 51007, ISO 10837.
HDSC L62
Due to the large amount of information provided, differential thermal analysis (DTA) is the most widely used thermal analysis method.
The Linseis high-temperature DTA L61 enables the highest calorimetric sensitivity, a short time constant and a condensation-free sample chamber in a single device. Our concept guarantees an extremely high resolution with simultaneous baseline stability over the entire service life of the instrument. The DTA system is an indispensable tool for materials research and quality control.
The modular DTA concept of the LINSEIS DTA L61 allows it to be equipped with various furnace types for an extremely wide temperature range from -150°C to 2400°C. Various measuring sensors are available for the DTA as well as different crucible types. The system can be coupled with a mass spectrometer or FTIR at any time to obtain further information.
Specifications
MODEL | HDSC L62* |
|---|---|
| Temperature range: | -150°C bis 500/1000°C, RT – 1400/1500/1600/1750/2000/2400°C |
| Sensor: | E/K/S/B/C |
| Sensor types: | DTA |
| Heating rate: | 0.001 K/min … 50 K/min |
| Cooling rate: | 0.001 K/min … 50 K/min |
| Sensor: | heat flux |
| Temperature modulation: | Yes |
| Atmosphere: | reduced, oxidizing, inert (static, dynamic) |
| Vacuum: | 10E-5 mbar |
| PC Interface: | USB |
| *Specifications depend on the configurations | |
Available accessories
🔵 Various gas boxes: manual, semi-automatic and MFC controlled
🔵 Variety of crucibles: gold, silver, platinum, aluminum, Al₂O₃, graphite, tungsten, stainless steel (high pressure), etc.
🔵 Various rotary and turbomolecular pumps
🔵 Various measuring systems
🔵 Optional gas analysis
🔵 Software for calculating the DTA signal
Applications
The LINSEIS DTA L61 uses a dynamic measuring principle. It measures endothermic and exothermic heat flows between the sample and reference, which are caused by physical or chemical changes. A DTA measurement is very often used to determine the purity of metal mixtures. This is due to the fact that the melting point changes depending on the different amounts of impurities.
🔵 Purity measurements
🔵 Melting point determination (onset / offset)
🔵 Stability of explosives (storage)
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