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Português Types of Thermogravimetric Analysis and Their Applications
Thermogravimetric analysis (TGA) is widely used to study how materials change in mass under controlled heating. These measurements reveal composition, stability, and reactions such as moisture release, volatile decomposition, oxidation, and ash formation. Because thermal behavior varies by material, different testing modes are applied depending on the information required.
Isothermal TGA
The sample is held at a constant temperature for a defined period. Useful for observing slow processes such as oxidation, drying, or decomposition under steady thermal conditions.
Dynamic TGA
The sample is heated at a controlled rate while mass is continuously recorded. This common approach reveals transitions such as moisture evaporation, polymer degradation, and carbonate decomposition as temperature rises.
Stepwise / Multi-Stage TGA
Temperature is increased in programmed stages with isothermal holds. This separates overlapping reactions—for example, moisture release followed by combustion of volatiles and final ash formation.
Derivative TGA (DTG)
The rate of mass change (d m/d t or d m/d T) is analyzed to highlight points of maximum decomposition or reaction, helping distinguish thermal events that may overlap in standard TGA curves.
A Modern Approach with Navas Instruments
Traditional single-sample systems can be slow and labor-intensive. The multi-sample, multi-stage thermogravimetric analyzer (TGA) from Navas Instruments consolidates these methods in a single automated platform:
- Analyze multiple samples simultaneously under isothermal, dynamic, or multi-stage programs.
- Record all weights continuously during heating—not just initial or final values.
- Capture every temperature and time point for each sample for full traceability.
- Export complete datasets directly to Excel spreadsheets for review and LIMS integration.
- Run in single-sample continuous mode with high-speed acquisition (up to 10 measurements/second) to capture rapid events.
This comprehensive approach delivers higher throughput, reliable data, and deeper insight into material behavior—across soils, ores, cement, waste products, plastics, and more.
