TGA Thermogravimetric Analyzer
Thermogravimetric analysis (TG, TGA) is the quality change of the sample with temperature or time during temperature rise, constant temperature or temperature reduction. The purpose is to study the thermal stability and composition of the material. It is widely used in research and development, process optimization and quality monitoring in various fields such as plastics, rubber, coatings, pharmaceuticals, catalysts, inorganic materials, metal materials and composite materials. Thermal stability, decomposition process, adsorption and desorption, oxidation and reduction, quantitative analysis of components, effects of additives and fillers, moisture and volatiles, reaction kinetics.
The thermogravimetric analyzer is mainly composed of a balance, a furnace, a program temperature control system, and a recording system. There are two general principles of measurement that we generally use, namely the displacement method and the zero method. The so-called displacement method is based on the relationship between the inclination of the balance beam and the mass change, and the inclination is detected by a differential transformer or the like, and is automatically recorded. The zero method uses the differential transformer method and the optical method to measure the inclination of the balance beam, and then adjusts the current of the coil installed in the balance system and the magnetic field, so that the coil rotates to restore the inclination of the balance beam, which is called the zero position method. Since the force applied by the rotation of the coil is proportional to the change in mass, this force is again proportional to the current in the coil, so it is only necessary to measure and record the change in current to obtain a curve of mass change.
The furnace body is heated by double-row winding of precious metal nickel-chromium alloy wire to reduce interference and high temperature resistance.
The tray sensor is made of precious metal nickel-chromium alloy and has the advantages of high temperature resistance, oxidation resistance and corrosion resistance.
Power supply, the cooling part is separated from the main unit to reduce the influence of heat and vibration on the micro-heat balance.
It adopts the upper open cover structure and is easy to operate. It is difficult to put the sample up the furnace and it is easy to cause damage to the sample rod.
The host uses a water temperature thermostat to isolate the thermal effects of the heating furnace on the chassis and the micro-heat balance.
The furnace body can be changed according to customer requirements.
Imported 32bit ARM processor Cortex-M3 core, sampling speed, processing speed is faster.
24bit four-way sampling AD collects DSC signals and TG signals and temperature T signals.
The power supply and water circulation part is separately controlled by 8bit single-chip microcomputer, so that the main unit and the cooling part are separated, and they do not interfere with each other, but the two are closely connected, and the cooling part is controlled by the host.
USB two-way communication between the software and the instrument, fully realize remote operation, the parameter setting of the instrument and the running of the instrument can be stopped by the computer software.
7-inch full color 24bit touch screen, better man-machine interface. The calibration of the TG can be achieved on the touch screen.
1. How long does it take for the balance of the thermogravimetric analyzer to stabilize?
A: The balance needs to be stable after the start.
2. What are the hot weight graphs?
A: The abscissa shows T (temperature) and the ordinate shows the percentage of heat loss.
3. Does the balance's stability depend on human identification or machine identification after injection?
A: Artificial identification
4. Take the percentage of heat loss on the ordinate, can you know the temperature of this point?
5. Can TGA perform first-order differential processing to obtain DTG curves?
A: Yes, the DTG line will not be displayed directly. After the experiment is completed, the DTG curve can be obtained.
6. How long does it take for 1000 °C to drop to room temperature?
A: About 1 hour
7. Is the gas oxygen or nitrogen?
Temperature range: room temperature ~ 1150 ° C
Temperature resolution: 0.1 °C
Temperature fluctuation: ±0.1 °C
Heating rate: 1~80°C/min
Temperature control mode: heating, constant temperature, cooling
Cooling time: 15min (1000°C...100°C)
Balance measurement range: 1mg ~ 2g, can be extended to 30g
Constant temperature time: 0~300min (arbitrary setting)
Display mode: Chinese character large screen LCD display
Atmosphere device: Built-in gas flow meter with two-way gas switching and flow rate control
Atmosphere: inert, oxidizing, reducing, static, dynamic
Software: Intelligent software can automatically record TG curve for data processing and print experimental report
Data interface: Standard USB interface, special software (software upgrades from time to time)
Power supply: AC220V, 50Hz
Appearance size: 489*400*343mm (length, width and height)