Description
To the point
The newly developed LINSEIS TGA PT 1000 top-shell thermobalance consists of a digital thermobalance and a sample holder with integrated thermocouple.
- The thermobalance enables analysis of samples with a weight of 5g (including measuring system) from (10°C) RT to 1100°C.
- The specially developed oven enables fast heating and cooling rates from 0.001 to 250°C/min, as well as highly accurate temperature control.
The device is ideal for thermal composition analysis, thermal stability tests and oxidation studies.
The optionally calculated DTA signal provides additional information on endothermic and exothermic reactions and can be used for temperature calibration.
MS and / or FTIR coupling is possible at any time.
New sample robot:
A sample robot with 42 positions in combination with automatic gas control and automatic evacuation enables long-term, unattended operation.
A sample robot with 90 positions is also available for an even higher sample throughput.
Unique features
Sample robot
Wide temperature
and pressure range
Versatile application options
Vacuum tight design
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Specifications
Black on white
MODEL | TGA PT 1000 |
|---|---|
| Design: | |
| Temperature range: | RT up to 1100°C |
| Heating and cooling rates: | 0.001 to 250°C/min |
| Sample weight: | Max. 5g |
| Gas atmospheres: | Inert, oxidizing, reducing, vacuum |
| Vacuum: | Up to 10E-3 mbar |
| Gas Dosage: | Built-in MFC block with 3 gases (one purge gas and two reaction gases) |
| Cooling rate: | < 12min (1100°C - 100°C) |
| Sample holder: | TGA |
| Sample robot: | 90 positions |
| Crucible: | Pt, Al2O3, Au, Al, Ag etc. more on request |
| EGA Couplings: | Optional FTIR and/or MS or GC-MS |
| Interface: | USB |
| Technical data may vary depending on furnace and components | |
Available accessories
- Calculated DTA software
- 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
- Sample robots with up to 90 positions
Software
Making values visible and comparable
The powerful LINSEIS thermal analysis software, which is based on Microsoft® Windows®, performs the most important function in the preparation, execution and evaluation of thermoanalytical experiments, in addition to the hardware used.
With this software package, Linseis offers a comprehensive solution for programming all device-specific settings and control functions, as well as for data storage and evaluation.
The package was developed by our in-house software specialists and application experts and has been tried and tested over many years.
TG properties
- Percentage (%) and absolute (mg/ug) change in mass
- Evaluation of the mass loss
- Residual mass determination
- 1st and
2nd derivative (peak temperature of the mass change)
General functions
- Real-time color display
- Automatic and manual scaling
- Display of the axes freely selectable (e.g. temperature
e.g. temperature (x-axis) against delta L (y-axis)) - Mathematical calculations (e.g. first and second derivatives)
- Saving complete evaluations
- Multitasking function
- Multi-user function
- Zoom option for various curve sections
- Any number of curves can be loaded on top of each other for comparison
- Online Help Menu
- Free labeling
- EXCEL® and ASCII export of measurement data
- Data smoothing
- Zero curves are offset
- Cursor function
- Statistical curve evaluation (mean value curve with confidence interval)
- Tabular printout of the data and expansion coefficients
- Calculation of Alpha Phys, Alpha Tech, relative expansion L/L0
- Curve arithmetic, addition, subtraction, multiplication
Applications
Application example: Gypsum plaster decomposition
The measurement example below shows a damage analysis of a gypsum plaster that showed cracks and structural damage after a summer – winter cycle. The manufacturer assumed that the application was not performed properly and used thermogravimetric analysis (TGA) to compare the damaged wall part with a reference gypsum sample that did not show cracks after heating and cooling cycles. The measurement shows that the carbon and organic content of the “bad” samples (green and blue curves) is almost identical with the reference samples (red and black curve).
The weight loss percentage shows the same level around 2 % mass loss in the range around 500 °C. However, there is a significant difference in the weight loss step around 800 °C – 900°C, where the contained carbonates are released as carbon dioxide: The reference samples show a mass loss of around 30 % caused by released CO2 while the samples from the wall with cracks show only 11 % mass loss and 13 % mass loss here. This indicates that the gypsum at the wall that showed structural failures has a significant lower carbon content than it should have which indicates that indeed the mixing of the gypsum plaster was performed wrong. Interestingly, there is also a difference in carbon content between the wall at the west side (weather facing side) and the east side of the building.
Well informed
