Graphite tubes

Graphite tubes are graphite products made of high-purity graphite powder through a specific process. They have a series of unique physical and chemical properties and a wide range of applications. The following is a detailed introduction to graphite tubes:

1. Product classification

By heating method:

Longitudinal heating graphite tube

Horizontal heating graphite tube

By performance:

Ordinary graphite tube (non-pyrolytic): suitable for low-temperature (≤2000℃) atomized elements, such as silver, cadmium, and lead.

Pyrolytic graphite tube: suitable for low, medium, and high temperature (>2500℃) atomized elements.

Platform graphite tube: suitable for medium and low temperature (≤2400℃) atomized elements.

2. Main characteristics

High thermal conductivity: Graphite tubes have excellent thermal conductivity, better than copper, and can dissipate heat quickly.

High temperature resistance: Able to withstand extreme high temperatures without deformation, suitable for various high temperature environments.

Good chemical stability: Graphite tubes are inert to a variety of chemicals and can withstand the erosion of strong acids, strong alkalis and other chemicals.
Excellent conductivity: The resistivity is less than 10^-5Ω·m, which is suitable for application scenarios that require conductive properties.
High mechanical strength: The graphite tube has high compressive and tensile strength and can withstand certain mechanical stress.
3. Manufacturing process
Extrusion method: Select graphite powder and an appropriate amount of binder to mix, and then make a graphite tube by extrusion molding. This method is low in cost, but the quality of the graphite tube is relatively low.
Heat treatment method: High molecular weight substances are made into hollow tubes, and then converted into graphite tubes by carbonization. The process is complicated, but the graphite tube is of high quality and has excellent physical and chemical properties.
Chemical vapor deposition method: Graphite atoms are generated through chemical vapor reactions, and nucleation and growth are carried out on the surface of metal or graphite under the action of catalysts to make graphite tubes. The process is complicated, but the graphite tube is of high quality, the finished product is uniform, and the diameter and length can be controlled.

4. Application fields
Electronic industry: used to manufacture semiconductors, vacuum tubes, electrodes, etc.
Chemical industry: used to manufacture reactors, heat exchangers, distillation towers and other equipment.
Metallurgical industry: used to manufacture high-temperature furnaces, crucibles and other equipment.
Mechanical industry: used to manufacture bearings, seals and other parts.

V. Specifications and models
The specifications and models of graphite tubes are diverse and can be customized according to customer needs. Common diameters range from 1mm to 1200mm, wall thicknesses range from 0.5mm to 50mm, and lengths range from 100mm to 3000mm. In addition, different surface treatments such as bright or spray paint can be selected, as well as additional parts such as flanges, joints, and threads.

VI. Precautions for use
Avoid collision and friction during transportation and installation to avoid damage to the surface and internal structure.
During use, care should be taken to keep it clean and avoid contamination and blockage.
In high temperature environments, care should be taken to prevent thermal shock and thermal stress to avoid affecting the service life.
Avoid excessive pressure and tension to avoid breakage and deformation.
VII. About us

Henan Yiguan Import and Export Co., Ltd. is one of the domestic manufacturers specializing in the production of graphite molds. The raw materials used by our company, such as isostatic graphite, molded graphite, and EDM graphite, have the characteristics of high strength, good thermal shock resistance, high temperature resistance, corrosion resistance, and strong oxidation resistance. The main products are: graphite molds, graphite crucibles, graphite plates, graphite rods, graphite tubes, graphite boxes, graphite blocks, graphite heaters, and various special-shaped graphite accessories, etc., which are widely used in metallurgical casting, solar photovoltaic, electronic semiconductors, new energy batteries, mechanical processing, industrial furnace high temperature treatment, diamond sintering, EDM, glass, chemical and nuclear industries.

Our company has long been committed to the development of the graphite processing industry, and is equipped with a series of advanced processing technology and equipment, and has established a special quality inspection department to ensure the quality of the company’s products. We can provide graphite processing services according to customer requirements, and process according to customer specifications, technical drawings and sketches. We use our processing technology and advanced processing equipment, as well as experienced processing technicians to produce perfect graphite products for customers.
In addition to mechanical processing, we also provide post-processing services such as graphitization and purification, and provide customers with perfect product services at preferential prices.
The company has always been adhering to the principle of “customer first, thoughtful service”, thinking about what customers think and what customers are anxious about, and making progress together with users in the field of graphite products to create brilliance.

In summary, as a high-performance material, graphite tubes are widely used in various fields. By understanding its classification, characteristics, production process, application fields, specifications and models, etc., you can better select and use graphite tubes.