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How to Use a Thermogravimetric Analyzer to Measure Loss on Mass in Alumina

Thermogravimetric analysis (TGA) is a vital technique for analyzing the thermal stability and composition of materials by measuring the mass change as a function of temperature. In the context of alumina (Al₂O₃), TGA helps identify thermal events such as dehydration, dehydroxylation, and decomposition of impurities. This article provides a detailed procedure for using a thermogravimetric analyzer to measure the loss on mass in alumina, incorporating specific considerations for accurate and reliable results.


Materials and Equipment

  • Thermogravimetric Analyzer (TGA)
  • Alumina Sample
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    Using TGA Instruments for LOI in Solid Combustion Residues

    Thermogravimetric analysis (TGA) has become essential for determining the loss on ignition (LOI) in solid combustion residues such as coal ash, biomass ash, and cement residues. LOI is a critical parameter in assessing the quality and usability of these residues, referring to the mass loss when the sample is heated in an air or oxygen atmosphere to high temperatures, typically around 750°C or 950°C.

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    How to Test for Ash Content in Plastics via TGA Analysis

    When plastic is burned it produces ash content, an inorganic residue that contains parts of the material that have not been affected by the heat. These can include pigments, fillers, and reinforcements. Depending on what it contains, ash content can affect the characteristics of the plastic. If a plastic contains a filler, such as talc or calcium carbonate, it is likely that its thermal stability and stiffness will be increased. However, too much of a filler could lower its strength. By undertaking ash content analysis, there is the potential to understand what it contains and, thus, how its content could affect its overall properties. This knowledge can be applied to quality control measures to optimize plastics as they proceed through development. Not o...

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