2022-11-19
2023-10-12The principle is to quantitatively inject the sample into a graphite tube using a sampler, and use the graphite tube as a resistance heating element. After being energized, the sample quickly heats up to achieve atomization. The heating power supply, maintenance gas control system, and graphite tube furnace are composed. An external power supply is added to both ends of the graphite tube to supply energy to the atomizer. The current flows through the graphite tube to generate a temperature of up to 3000 ℃, causing the measured element in the graphite tube to become ground state atomic vapor. The maintenance gas control system is used to control the instrument startup of maintenance gas, maintain the flow of Ar gas, and cut off the Ar gas flow after the air combustion is completed. The Ar gas in the external gas path flows along the outer wall of the graphite tube to maintain it from being burned, while the Ar gas in the internal path flows from both ends of the tube to the center of t
2023-10-11The graphite column combines the wear resistance of copper alloy and the self-lubricating performance of solid graphite lubricant, making it unnecessary to refuel and maintain during use. The product is widely used for high load, intermittent or swinging movements, such as production lines for steam locomotives, water turbines, reservoir work/accident doors, plastic machinery, etc. According to the operating conditions used, various types of copper alloys can be provided.The main component of graphite column is graphite, and its performance is different from that of ordinary graphite1、 The production and processing technology characteristics of graphite pillars:1. High temperature resistance: Graphite is currently one of the most high-temperature resistant materials known. Its melting point is 3850 ℃± 50 ℃, and its boiling point reaches 4250 ℃. It is subjected to an ultra-high temperature arc at 7000 ℃ for 10 seconds, with the smallest loss of graphite, which is 0.8% by weight. From t
2023-10-111. Graphite rods have high density, good sealing performance, low air tightness, long service life, strong oxidation resistance, and low maintenance rate2. In terms of the application of vacuum furnace heating graphite rods, we can provide temperature design requirements for heating graphite rods, and we can provide free technical consultation and after-sales service to customers3. High purity graphite rods, graphite rods for bearings, graphite blocks, and graphite rods are used in precision instruments, aerospace industry, military industry, chemical industry, and metallurgical industry.4. These products can be used to make graphite heaters (heating graphite rods), graphite instruments, graphite bearings, graphite crucibles, graphite heating elements and tubes for vacuum furnaces, graphite furnace nails, graphite racks, graphite tools, templates, etc5. Modifiable performance: high temperature and chemical resistance, good thermal conductivity, low coefficient of thermal expansion, an
2023-10-101. Thermal stability: Specially designed for the use conditions of graphite crucibles for rapid heating and cooling to ensure the reliability of product quality.2. Corrosion resistance: The uniform and fine substrate design delays the erosion of the crucible.3. Impact resistance: The graphite crucible can withstand extremely high thermal shock strength, so any process treatment can be carried out with confidence.4. Acid resistance: The addition of special materials significantly improves the quality of the crucible, performs excellently in acid resistance indicators, and greatly extends the service life of the graphite crucible.5. High thermal conductivity: The high content of fixed carbon ensures good thermal conductivity, shortens dissolution time, and significantly reduces fuel consumption or other energy consumption.6. Control of metal pollution: Strict control of material composition ensures that the graphite crucible does not contaminate the metal during dissolution.7. Quality s
2023-10-101. Used as refractory material: Graphite and its products have properties of high temperature resistance and strength, and are mainly used in the metallurgical industry to manufacture graphite crucibles. In steelmaking, graphite is commonly used as a protective agent for steel ingots and as a lining for metallurgical furnaces.2. As a conductive material: used in the electrical industry to manufacture electrodes, brushes, carbon rods, carbon tubes, positive electrodes for mercury positive current transformers, graphite gaskets, telephone parts, coatings for television tubes, etc.3. As a wear-resistant lubricating material: Graphite is often used as a lubricant in the mechanical industry. Lubricating oil often cannot be used under high-speed, high-temperature, and high-pressure conditions, while graphite wear-resistant materials can work without lubricating oil at high sliding speeds at temperatures of 200-2000 ℃. Many devices that transport corrosive media are widely made of graphite m
2023-10-091. Good wear resistance, low friction coefficient, and long service life.2. Having an appropriate amount of elasticity and plasticity can distribute stress over a wider contact surface, improving the bearing capacity.3. It can reduce vibration, reduce noise, prevent pollution, and improve labor conditions for machinery.4. During operation, a transfer film can be formed to protect the grinding shaft without any biting phenomenon.5. The hardness requirements for grinding shafts are low, and shafts that have not been quenched and tempered can be used, thereby reducing the difficulty of machining related parts.6. Thin walled structure, lightweight, can reduce mechanical volume.7. At present, it has been widely used in various sliding parts of machinery, such as printing machines, textile machines, tobacco machinery, micro motors, automobiles, motorcycles, and agricultural and forestry machinery.
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