termogravimeetrilise

Termogravimeetrilise is a thermal analysis technique used to measure the change in mass of a sample as a function of temperature or time. This method provides valuable information about the thermal stability of materials, decomposition processes, and the presence of volatile components. In a typical thermogravimetric analysis (TGA) experiment, a sample is placed in a crucible and heated at a controlled rate within a furnace. A sensitive balance continuously records the sample's mass. As the temperature increases, physical or chemical changes within the sample can cause mass loss (e.g., evaporation of solvent, decomposition releasing gaseous products) or, less commonly, mass gain (e.g., oxidation). The resulting data is plotted as a thermogravimetric curve, showing mass versus temperature. The shape and features of this curve, such as the onset temperature of mass loss, the rate of mass change, and the total mass loss, are characteristic of the material being analyzed. TGA is widely applied in various fields, including polymer science, ceramics, pharmaceuticals, and environmental analysis, for characterization, quality control, and research purposes.