A graphite furnace is a device used to heat a sample solution in a graphite or pyrolytic carbon-coated graphite tube.
The goal is to vaporize and atomize the analyte, which is the substance being analyzed.
The graphite tube furnace is made of graphite tubes with good thermal conductivity and high temperature resistance.
This allows the furnace to bring the sample or workpiece to very high temperatures.
How Does a Graphite Furnace Work? 5 Key Points Explained
1. Sample Injection and Heating
The sample solution is injected into the graphite tube.
The tube is then heated to high temperatures.
As the temperature increases, the sample solution vaporizes.
The atoms of the analyte are atomized in the process.
2. Light Absorption and Analysis
These atoms can absorb ultraviolet or visible light of a specific wavelength.
This absorption is characteristic of the element being analyzed.
The absorption causes the atoms to make transitions to higher electronic energy levels.
By measuring the amount of light absorbed, the concentration of the analyte in the sample can be determined.
3. High Temperature Capabilities
Graphite furnaces can operate at very high temperatures.
They can reach up to 3000°C in inert gas or 2200°C in a vacuum.
Graphite is chosen for the furnace due to its excellent thermal properties and chemical resistance.
The graphite heating elements are made from high purity carbon composite.
This provides excellent temperature uniformity, longevity, mechanical strength, and repeatability.
4. Vacuum Graphite Furnace
The vacuum graphite furnace is used for high-temperature treatment of materials.
It operates in a vacuum or protective atmosphere environment.
It is designed with advanced temperature measurement, temperature control, and intelligence.
The graphite wafer inside the furnace creates ideal black body conditions.
This allows for high uniformity in temperature.
5. High-Temperature Graphite Furnace (HTG)
The high-temperature graphite (HTG) furnace is an economical vacuum furnace system.
It is used for processes that require high temperatures up to and above 2500°C.
The hot zones of these furnaces are made entirely from high purity graphite.
This allows for rapid heating and cooling.
In most applications, the hot zone has a long operating life.
For aggressive materials, hot zone replacement can be done easily in the field.
Continue Exploring, Consult Our Experts
Are you in need of a reliable and efficient graphite furnace for your laboratory?
Look no further than KINTEK! Our cutting-edge graphite furnaces offer excellent thermal properties and chemical resistance.
Ensure accurate and precise measurements for your analytical needs.
With temperature uniformity, fast heating speed, and easy operation, our graphite furnaces are perfect for graphitization treatment and graphene growth.
Upgrade your lab with KINTEK's superior graphite furnaces today and experience unparalleled performance.
Contact us now for a consultation!
