A thermogravimetric analysis system capable of high-precision initial stability measurement

Abstract

The invention belongs to high-temperature oxidation experimental equipment, in particular to a thermogravimetric analysis system capable of realizing high-precision initial stability measurement. The electronic balance weighing device is located above the reactor, and the reactor is installed in the central hole of the annular infrared radiation heating device; the reactor includes a quartz inner tube and a quartz outer tube, and the upper and lower sides of the vertically arranged quartz outer tube are nested respectively. The quartz inner tube with a hole in the wall, the upper quartz inner tube and the lower quartz inner tube are arranged vertically opposite, the opening of the upper quartz inner tube is located at the upper end and communicates with the electronic balance weighing device, and the opening of the lower quartz inner tube is located at the lower end and It is connected with the air inlet of the gas control device; the upper quartz inner tube is used as a reaction chamber for weighing samples. The invention realizes rapid heating of samples and ultra-fast and stable temperature control, reduces the influence of airflow disturbance effect, reduces the noise signal of thermogravimetric data, and inhibits the damage of reaction gas and generated gas to the electronic balance through specific structural design of the reactor.

Description

technical field [0001] The invention belongs to high-temperature oxidation experimental equipment, in particular to a thermogravimetric analysis system capable of realizing high-precision initial stable measurement. Background technique [0002] Thermogravimetric analyzer (thermobalance) is an instrument device that measures the change of sample mass with time under programmed temperature conditions, and is widely used in high temperature reaction kinetics research. However, although many fields such as material preparation and processing, heat treatment, and material service behavior are involved in the study of the initial oxidation mechanism, it is still difficult to obtain reliable information on the initial oxidation kinetics by existing experimental methods. [0003] The conventional thermobalance has a long heating and stabilization time. During the long temperature changing process, the airflow disturbance effect introduces a large number of noise signals, which mask...

AI Technical Summary

Problems solved by technology

However, although the thermobalance system developed by Maple Steel improved the signal-to-noise ratio in the initial stage of thermobalance measurement by using infrared radiation heating, the influence of airflow disturbance effect is still difficult to ignore, and the noise signal still needs to be further reduced

In addition, the above-mentioned thermal balance system has the problem of reactive gas and generated gas corroding the electronic balance, especially when the sample contains high-temperature volatile substances, the vaporized volatile substances will condense on the upper electronic balance end, which will damage the accuracy

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