L81-I STA
Simultaneous Thermal Analysis STA L81-I
Description
On point
The LINSEIS L81-I (Simultaneous Thermal Analysis) is designed as a top loading Thermobalance, providing excellent drift stability, a robust design and highest TG and DSC/DTA reproducibility. All measuring systems are easily user exchangeable to ensure quick and simple system handling. The broad selection of furnaces (optional turntable) ranging from -150°C up to 2400°C and the large sample mass of up to 25g/3ml are unique features of this system.
The balance design can provide high vacuum (10E-5mbar), inert, reducing, flowing or humidified atmosphere. Corrosive conditions can be analyzed with proper precautions. The system is capable of adapting residual gas analysis systems using an optional heated capillary.
Because of the vacuum tight design of the instrument, static and dynamic atmospheres are possible. An optional gas control box and a vacuum pump can be connected.
Specifications
| Model | L81-I STA |
|---|---|
| Temperature range: | -150 up to 500/1000°C RT up to 1600/1750/2000/2400°C |
| Sample mass: | up to 25g / 3ml |
| Resolution: | 1 ug |
| Vacuum: | up to 10E-5mbar |
| Automatic evacuation: | optional |
| Gas control (optional): | up to 4 gases |
| Sensors: | TG TG – DTA TG – DSC TG – DSC – Cp |
| Sensor material: | E/K/S/B |
| Electronics: | Integrated or External |
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Software
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 STA 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
HT-DSC – Features
- Glass transition temperature
- Curve subtraction
- Complex peak evaluation
- Multipoint calibration for sample temperature
- Multipoint calibration for change of enthalpy
- Cp calibration for heat flow
- Signal-steered measuring procedures
General Features
- 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
Application example: Cement
The main parts of cement are tri calcium silicate, di calcium silicate and tri calcium aluminates. After putting on the cement with water different hydrates slowly form. The absorbed water evaporates first, then hydrates of the calcium silicate decompose and at 570°C the hydroxides of calcium, magnesium and aluminum follow. Subsequently, calcium carbonate CO2 splits off.
