ASTM D696 DIN 51045 1250℃ TGA Thermo Gravimetric Analyzer ASTM E831 Thermogravimeter TGA Tester

ASTM D696 DIN 51045 1250℃ TGA Thermo Gravimetric Analyzer ASTM E831 Thermogravimeter TGA Tester

Working principle

The working principle of a thermo gravimetric analyzer (TGA) is based on programmed temperature control, measuring the relationship between the mass of a substance and temperature or time. Its main components include a heating furnace, balance, temperature controller, and recording system.

Heating process: The sample is placed in a crucible inside a heating furnace and heated or cooled at a certain rate through a programmed temperature control system. During this process, the sample will undergo a series of physical and chemical changes, such as water evaporation, organic matter decomposition, phase transition, etc., which will lead to a decrease in sample quality.

Quality monitoring: The quality changes of the samples are measured and recorded in real-time by a high-precision balance. The balance converts changes in mass into electrical signals, transmits them to the recording system, and ultimately displays the relationship between mass and temperature or time in the form of a curve.

Data recording and analysis: By recording the quality change curve recorded by the system, the thermal stability, phase transition temperature, decomposition temperature and other characteristics of the sample can be analyzed.

Application area

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.

                     Plastic materials                  Metallic materials                   Drugs                                    Paint

Structural advantages

1. The furnace body heating adopts a double row winding of precious metal platinum rhodium alloy wire, reducing interference and making it more resistant to high temperatures.

2. The tray sensor is made of precious metal alloy wire and is finely crafted, with advantages such as high temperature resistance, oxidation resistance, and corrosion resistance.

3. Separate the power supply, circulating heat dissipation part from the main unit to reduce the impact of heat and vibration on the microcalorimeter.

4. The host adopts an isolated heating furnace to mitigate the thermal impact on the chassis and micro thermal balance.

5. The furnace body adopts double insulation for better linearity; The furnace body is equipped with automatic lifting, which can quickly cool down; With exhaust outlet, it can be used in conjunction with infrared and other technologies

Controller and software advantages:

1. Adopting imported ARM processors for faster sampling and processing speed.

2. Four channel sampling AD is used to collect TG signals and temperature T signals.

3. Heating control, using PID algorithm for precise control. Can be heated in multiple stages and kept at a constant temperature

4. The software and instrument use USB bidirectional communication, fully realizing remote operation. The instrument parameters can be set and the operation can be stopped through computer software.

5. 7-inch full-color 24 bit touch screen for a better human-machine interface. TG calibration can be achieved on the touch screen

Standards

ASTM D 3386; ASTM D 696; ASTM E831-2019; ASTM E831-06; ASTM E831-2014; DIN 51045-3-2009; GB/T 33047.3-2021; GB/T 4498.2-2017; GB/T 32868-2016; GB/T 31984-2015; GB/T 14837.2-2014; GB/T 29189-2012

ASTM D696 DIN 51045 1250℃ TGA Thermo Gravimetric Analyzer ASTM E831 Thermogravimeter TGA Tester

Technical Specification

Application examples

Sample Testing calcium oxalate chart

Data analysis

Calcium oxalate undergoes three stages of significant weight loss at RT-1000 ℃. The first stage represents the loss of water molecules, the second stage represents the decomposition of CaC2Q4 into CaCQ3, and the third stage represents the decomposition of CaCO3 into Ca0. From the above figure, it can be concluded that calcium oxalate loses 12.31% of water molecules at RT-300 ℃. In the second stage of 350 ℃ -550 ℃, calcium oxalate begins to decompose and lose 19.14% weight, resulting in a mass proportion of CaCQ3 of 100% -12.31% -19.14%=68.55%. In the third stage of 600 ℃ -850 ℃, the weight loss is 30.74%, resulting in a mass proportion of calcium oxide of 68.55% -30.74%=37.81%

Sample Testing rubber products chart

Data analysis

Thermogravimetric analysis can quickly determine the proportion of various components in rubber. According to the standard ISO 9924-1-2016 Rubber and Rubber Products The thermogravimetric method is used to determine the composition of vulcanized rubber and uncured compounds, and the above spectrum is obtained. The first stage in the figure shows the weight loss due to rubber evaporation, with a weight loss of 19.14% at RT-316.7 ℃; In the second stage, the Weight loss is between 316.7 ℃ and 550.10 ℃, and the rubber begins to crack. At RT-550.10 ℃, the weight loss of organic matter content is 71.62%; Oxygen is supplied at 550 ℃ -650 ℃, and the weight loss of carbon black combustion occurs, resulting in a carbon black content of 21.95% in the rubber.