A thermogravimetric analyzer (TGA analyzer) is an instrument that measures the relationship between the temperature and mass change of a substance. Thermogravimetry is the method of measuring the change in the mass of a material as a function of temperature (or time) under programmed temperature conditions.
The thermogravimetric analyzer primarily consists of several components, including a balance, furnace, programmed temperature control system, and recording system.
There are two commonly used measurement principles: the displacement method and the zero-position method. The displacement method involves detecting the inclination of the balance beam, which is proportional to the change in mass, using a differential transformer or similar devices, and automatically recording the data. The zero-position method uses a differential transformer or optical method to measure the inclination of the balance beam. The current in a coil mounted in the balance system and magnetic field is adjusted to return the balance beam to its original position, compensating for the displacement. Since the force exerted by the rotation of the coil is proportional to the mass change, and this force is related to the current in the coil, measuring and recording the changes in current provides the mass change curve.
Strong Quantification: A thermogravimetric analyzer can precisely measure the mass change of a substance and its rate, making it suitable for studying thermal stability, decomposition processes, dehydration, dissociation, oxidation, reduction, and other chemical phenomena.
Small Sample Size and High Resolution: The TGA analyzer requires a minimal sample size and offers high resolution, making it ideal for trace analysis and detailed study of the thermal behavior of materials.
Multiple Influencing Factors in the Testing Process: The testing process in thermogravimetric analysis is influenced by various factors, including the heating rate, paper speed, furnace atmosphere, sample quantity, particle size, sample container, buoyancy, convection, vapor condensation, packing method, and preheating time. All these factors must be considered during experimental design to ensure data accuracy and reproducibility.
HENVEN thermogravimetric analyzer is high-precision instrument used to study the mass changes of materials during heating. By measuring the mass loss of a sample under different temperature conditions, they help investigate its thermal stability, decomposition processes, and compositional components. HENVEN thermogravimetric analyzer is widely used in material science, chemical engineering, environmental protection, and other fields, with significant applications in the study of polymers, metals, coal, catalysts, and food materials.
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