Novel thermogravimetric analysis device

Abstract

The invention discloses a novel thermogravimetric analysis device which includes a test sample heating system, a protective gas transporting system, a temperature collection and auto-control system, a weight collecting system, and a data processing and control system. The test sample heating system is connected to a sheet-like test sample through a heating element in a directly contacted manner; the temperature collection and auto-control system is connected to the test sample through a temperature sensor in the directly contacted manner; the weight collecting system is connected to a lever-type weight transfer apparatus through a weight testing apparatus. The thermogravimetric analysis device achieves multi-contact-point temperature measurement and data collection of relationship of temperature to mass at multi-temperature-increasing rate, allows the thermogravimetric process of a sample to be traced in the whole course, and satisfies practical scientific researching and production demand better.

Description

Technical field [0001] The invention relates to a new type of thermogravimetric analysis device, which belongs to the field of material thermal analysis. Background technique [0002] Thermogravimetric analysis refers to the measurement of the relationship between the mass of a substance and the temperature (or time) under program temperature control. When the measured substance sublimates, vaporizes, decomposes gas or loses crystal water during the heating process, the quality of the measured substance will change. By analyzing the TG curve, the quality change and rate of change of the substance can be accurately analyzed. The properties measured by the thermogravimetric method include corrosion, high temperature decomposition, adsorption and desorption, solvent loss, oxidation and reduction reactions, hydration and dehydration, decomposition, black smoke and so on. At present, it is widely used in research and development, process optimization and quality monitoring in various...

AI Technical Summary

Problems solved by technology

The disadvantage is that most thermogravimetric analyzers measure the mass range of samples from 0 to 100 mg, and some can reach 500 mg. The measurement system needs to have high sensitivity and stability. At the same time, the temperature measured by the thermocouple at the bottom of the crucible and the temperature inside the crucible The temperature of the sample will have a certain difference, especially when the mass or volume of the sample is large, the heat transfer resistance increases, the internal temperature gradient increases, and the temperature measured through the surface cannot represent the actual temperature of the sample; at the same time, due to the heating furnace There is a certain distance from the sample, which cannot meet the thermal analysis test of rapid temperature rise (such as temperature rise rate > 200°C / min)

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