The differences are as follows:

First, refer to different

1, TGA: refers to a thermal analysis technique for measuring the relationship between the mass of the sample to be measured and the temperature change under programmed temperature rise, which is used to study the thermal stability and composition of materials.

2.TG: the weight value of the substance to be measured in thermogravimetric analysis.

Second, the principle is different.

1, TGA: convert the balance displacement caused by the change of sample weight into electromagnetic quantity, amplify it by an amplifier and send it to a recorder for recording; The quantity of electricity is directly proportional to the weight change of the sample. When the measured substance sublimes, decomposes into gas or loses crystal water during heating, the quality of the measured substance will change.

2.TG: Thermogravimetric analyzer is mainly composed of balance, heating furnace, programmed temperature control system and recording system. According to the proportional relationship between the inclination of the balance beam and the mass change, the inclination is detected by the differential transformer and automatically recorded.

Third, the acquisition methods are different.

1, TGA: including isobaric mass change measurement and isothermal mass change measurement. Isobaric mass change measurement refers to a method to measure the relationship between mass and temperature under the temperature controlled by program and constant volatile pressure. Isothermal mass change measurement is a method to measure the relationship between mass and pressure at constant temperature. This method is accurate, but it takes a lot of time.

2.TG: Because the force exerted by the coil rotation is proportional to the mass change, and this force is proportional to the current in the coil, only by measuring and recording the current change can the curve of mass change be obtained.

Baidu Encyclopedia-Thermogravimetric Analysis

Baidu encyclopedia -TG