Gravitational thermal analysis method and device for heating sample by microwave

The invention discloses a microwave thermogravimetric analysis (TGA) method and a device, wherein, the device comprises four parts, namely, a microwave oven, a mass measurement system, a temperature measurement system and an atmosphere adjustment system. The microwave input power can be set to a fixed value and also can set to be linked with the temperature measurement system. The mass measurement system monitors the mass variation of a test sample in real time; the temperature measurement system utilizes an infrared thermometer and a thermocouple to monitor the temperature of the test sample and the hearth in real time. The atmosphere heating can be achieved by the atmosphere adjustment system and the heating atmosphere can be air atmosphere, inert atmosphere, oxidizing atmosphere or reducing atmosphere. The device provided by the invention has the advantages of simple structure, high degree of automation and convenient operation, the invention can obtain the relation among mass, time/mass, and temperature of multiple test samples under different atmospheres in the process of microwave heating, and realizes microwave thermogravimetric analysis of the test samples with larger mass or volume.