Working principle of box type high-temperature resistance furnace

High temperature graphite vacuum furnace has great advantages in material heat treatment, advanced material synthesis and other fields. Let’s take a look below!

Superior high-temperature performance
High temperature accessibility: capable of achieving very high heating temperatures, usually above 1800 ℃, and even some advanced equipment can reach around 2000 ℃. This makes it suitable for processing materials that require phase transformation, sintering, or reaction at extremely high temperatures, such as high-performance ceramics, refractory metals, etc.
Good temperature uniformity: By using good heating technology and insulation structure, the temperature distribution inside the furnace can be relatively uniform. For example, by reasonably arranging graphite heating elements and combining them with a precise temperature control system, the temperature difference inside the furnace can be controlled within a small range, generally within ± 5 ℃, ensuring that all parts of the material can be uniformly heated during the heat treatment process, thereby improving the consistency of product quality.

Advantages of vacuum environment
Preventing oxidation: Under vacuum conditions, there are almost no oxidizing gases such as oxygen, which can effectively prevent materials from being oxidized at high temperatures. For some easily oxidizable metal materials, such as titanium alloys, nickel based alloys, as well as semiconductor materials and magnetic materials that require strict oxygen content, the vacuum environment provided by high-temperature graphite vacuum furnaces can ensure that the purity and performance of the materials are not affected by oxidation.
Removing impurities: A vacuum environment is beneficial for removing gas impurities and volatile substances from materials. At high temperatures, impurities in the material will evaporate and be extracted by a vacuum pump, thereby improving the purity of the material. For example, in the production of high-performance carbon fibers, a high-temperature graphite vacuum furnace can remove residual solvents and impurities from the fibers, improving their strength and modulus.
Improving surface quality: Due to the absence of an oxidizing atmosphere, the material will not form an oxide scale on the surface during heat treatment, which can maintain good surface smoothness and accuracy. For some parts that require high surface quality, such as optical components and precision molds, high-temperature graphite vacuum furnace treatment can reduce subsequent surface processing steps and lower production costs.

Characteristics of graphite material
High thermal conductivity: Graphite has good thermal conductivity, which can quickly transfer heat to the processed material, shorten heating time, and improve production efficiency. Meanwhile, during the cooling process, the material can also be rapidly and uniformly cooled, which is beneficial for controlling the material’s microstructure and properties.
Chemical stability: Graphite has high chemical stability at high temperatures and is not prone to chemical reactions with most materials. This allows high-temperature graphite vacuum furnaces to process a variety of different types of materials without contaminating or altering their chemical composition.
High strength and high temperature resistance: Graphite materials can maintain high strength at high temperatures and are not easily deformed or damaged. Even in high temperature environments above 2000 ℃, graphite heating elements and furnace structural components can still work stably, ensuring the reliability and service life of the equipment.

Process flexibility
Accurate control of process parameters: The high-temperature graphite vacuum furnace is equipped with a good control system, which can accurately control process parameters such as temperature, vacuum degree, heating time, etc. Operators can flexibly set and adjust process parameters according to the processing requirements of different materials to achieve better processing results. For example, for different types of metal materials, different microstructures and properties can be obtained by precisely controlling the quenching temperature and holding time.
Multiple atmosphere options: In addition to the vacuum environment, high-temperature graphite vacuum furnaces can also be filled with different protective gases such as argon, nitrogen, etc. according to process needs. By controlling the type, flow rate, and pressure of gases, different atmosphere environments can be created to meet the special requirements of various material processing. For example, in the heat treatment process of certain metal materials, injecting an appropriate amount of argon gas can further prevent oxidation and improve the surface quality of the material.

As can be seen from the above, high-temperature graphite vacuum furnaces have many advantages. You can consult relevant technical personnel before purchasing and customize graphite furnaces that are suitable for your own experiments or production!