TGA PT 1000
The Linseis TGA PT1000 for thermogravimetric applications is a toploading Thermobalance, which offers a highly userfriendly design. Even at a sample weight of up to 5g the tara is done electronically.
The specially designed furnaces allow fast heating and cooling rates from 0.001 up to 250°C/min as well as a highly precise temperature control from (10°C) RT up to 1100°C.
The system can be optionally equipped with a coupling device for EGA (Evolved Gas Analysis). The instrument is highly suitable for thermal composition, thermal stability and oxidation studies.
The (optional) calculated DTA signal provides important additional information regarding endothermal or exothermal reactions. Furthermore it can be used as a tool for temperature calibration.
Linseis automation system:
An optional 42 position sample robot in combination with the optional automatic gas control and automatic evacuating system enables long term unattended operation.
For an even higher throughput, a sample robot for up to 84 positions is also available.
|MODEL||TGA PT 1000*|
|Temperature range:||RT up to 1100°C|
|Heating and Cooling rates:||0.001 bis 250°C/min|
|Sample mass:||max. 5 g|
|Gas atmosphere:||Inert, ocid., red., vaccum|
|Vacuum:||up to 10E-3mbar|
|Gas Dosing:||built-in MFC block with 3 gases
(one Purge gas and two reactive gases)
|Cool down speed:||< 12min (1100°C – 100°C)|
|Sample robot:||42 positions|
|Crucible:||Pt, Al2O3, Au, Al, Ag etc. others on request|
|EGA Couplings:||Optional FTIR and/or MS or GC-MS|
*Specs depend on configurations
- Software for determination of calculated DTA signal
- Different types of vacuum and turbo molecular pumps
- Selection of manual, semi-automatic and automatic (MFC) Gas control boxes
- Broad range of crucibles (gold, silver, platinum, quartz glass, alumina oxide, aluminum, high pressure stainless steel, etc.)
- Sample robot for up to 84 positions
All LINSEIS thermo analytical instruments are PC controlled. The individual software modules exclusively run under Microsoft® Windows® operating systems. The complete software consists of 3 modules: temperature control, data acquisition and data evaluation. The 32 bit software incorporates all essential features for measurement preparation, execution, and evaluation of a Thermogravimetric measurement. Thanks to our specialists and application experts, LINSEIS was able to develop comprehensive easy to understand user friendly application software.
TG – Features
- Mass change as % and mg
- Rate Controlled Mass Loss
- Evaluation of mass loss
- Residue mass evaluation
- Program capable of text editing
- Data security in case of power failure
- Thermocouple break protection
- Repetition measurements with minimum parameter input
- Evaluation of current measurement
- Curve comparison up to 32 curves
- Storage and export of evaluations
- Export and import of data ASCII
- Data export to MS Excel
- Multi-methods analysis (DSC TG, TMA, DIL, etc.)
- Zoom function
- 1 and 2 derivation
- Programmable gas control
- Statistical evaluation package
- Free scaling
Applications example: Decomposition of CaC2O4 • H2O
The evolved gases from the decomposition of calcium oxalate has been fed into the mass spectrometer with a heated capillary. The ion currents for mass numbers 18 (water), 28 (carbon monoxide) and 44 (carbon dioxide) have been imported into the graph.
Applications example: Cement
The main parts of cement are tri calcium silicate, di calcium silicate and tri calcium aluminates. Hydrates slowly form after mixing cement with water. The absorbed water evaporates first. Hydrates of the calcium silicate decompose at 570°C. The hydroxides of calcium, magnesium and aluminum follow. Subsequently, CO2 splits off
from calcium carbonate.
Applications example: Decomposition of rubber
In the first step of weight loss, the dehydration of the sample takes place. The amount of water was 9.27%. In the second reaction step, the volatile components are released by pyrolysis under N2 atmosphere. The amount of these components is 35.99%. For the third reaction step, the atmosphere is changed to O2 – all organic components are burned out. The loss in weight is 14.33%. The remaining rest of 40.41% are inorganic components like ashes, slake or fillers.
Applications example: Aspirin
At the beginning of the heating process some adsorbed water is released, resulting in a weight loss of around 1%. At 140°C the melting point of the Aspirin is reached, resulting in an exothermic reaction, measured on the DTA trace. At 160°C the decomposition of the melted drug takes place in several stages. Since the decomposition products are volatile a weight loss of just about 80% occurs.