What is an experimental gradient tube furnace?

The experimental gradient tube furnace is a specialized equipment, and the following is a detailed introduction to it:

1. Definition
Experimental gradient tube furnace is a heating device widely used in scientific research, teaching, and laboratory environments. It provides powerful tools for materials science research, metal material processing, and new energy material preparation by precisely controlling temperature gradients.

2. Working principle
The working principle of the experimental gradient tube furnace mainly includes two aspects:

Heating method: High temperature is usually generated by high-frequency electromagnetic fields or diffusion combustion of gas and air, which heats the furnace and partition walls, and heats the gas itself to a very high temperature. High temperature gas and flame directly radiate the furnace tube, while the influence of gas flow infiltration plays a role in convective conduction heating.
Temperature gradient control: By introducing inert gas to form a protective layer between the pipe wall and the air inside the pipe, the heat loss of the pipe wall is slowed down and the temperature of the pipe wall is uniformly distributed. Meanwhile, through advanced temperature control systems, multiple temperature zones can be formed inside the furnace tube to meet the experimental requirements for temperature gradients.

3. Structural characteristics
The structural characteristics of the experimental gradient tube furnace mainly include:

Furnace structure: The furnace structure is simple, easy to operate and control. The shell is usually made of national standard steel, which has properties such as temperature resistance, durability, and oxidation resistance. The furnace is made of imported Morgan fiber or silicon carbide refractory materials to avoid cracking caused by rapid cooling and heating.
Heating element: Heating elements are usually made of iron chromium alloy wound in spiral shaped single wire grooves to ensure uniform heat distribution.
Thermal insulation layer: refractory fiber and foam guide brick are used between the furnace and the furnace shell to form the thermal insulation layer, so as to improve the thermal efficiency and reduce the heat loss.

4.Application Fields
The experimental gradient tube furnace has a wide range of applications in multiple fields:

Materials science research: used to study the changes in physical and chemical properties of materials at different temperatures, explore the phase transition laws, thermal stability, etc. of materials.
Metal material processing: processes such as annealing and tempering to improve the mechanical and process properties of materials.
Preparation of new energy materials: used for the preparation and performance testing of battery materials, promoting the development of new energy technology.
Nanomaterial synthesis: By precisely controlling the temperature gradient, uniform growth and morphology control of nanoparticles can be achieved.
Preparation of thin film materials: Deposition or annealing treatment is carried out in different temperature regions to obtain thin film materials with specific structures and properties.

5. Operation and maintenance
The operation of experimental gradient tube furnaces has usually achieved intelligent one click operation, which is convenient and fast. At the same time, to ensure the long-term stable operation of the equipment, regular maintenance and upkeep are required, including cleaning the furnace, inspecting heating elements and insulation layers, etc.

In summary, the experimental gradient tube furnace is a powerful and structurally simple heating device that plays an important role in scientific research, teaching, and laboratory environments.