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What are the performance characteristics and main applications of silicon carbide furnace tubes?

Release time:

2022-04-06

　　 Silicon carbide furnace tube It boasts advantages such as high strength, high hardness, excellent wear resistance, high-temperature resistance, corrosion resistance, good thermal shock resistance, high thermal conductivity, and excellent oxidation resistance. It is primarily used in applications including medium-frequency casting, various heat-treatment electric furnaces, metallurgy, chemical industry, and non-ferrous metal forging. Silicon carbide furnace tubes are widely employed in metallurgical sintering furnaces and medium-frequency heating casting furnaces, and their lengths can be customized according to actual site requirements.

　　Characteristics of Silicon Carbide Furnace Tubes

　　 Silicon carbide furnace tube This is a high-quality silicon carbide product made primarily from silicon carbide and produced through high-temperature sintering. It boasts numerous advantages, including high-temperature resistance, corrosion resistance, rapid thermal conductivity, high strength, high hardness, excellent wear resistance, good thermal shock resistance, a high thermal conductivity coefficient, and superior oxidation resistance. Both ends are equipped with special high-temperature-resistant insulating sleeves, effectively preventing corrosion of the heating elements (including silicon carbide rods and electric furnace wires) by molten metals. Its performance metrics surpass those of various graphite products. The silicon carbide furnace tube exhibits excellent thermal conductivity, oxidation resistance, thermal shock resistance, high-temperature wear resistance, chemical stability, strong acid resistance, and no reaction with strong acids or strong bases.

　　Silicon Carbide Furnace Tube Production Technology: This finished product is an excellent silicon carbide item made primarily from silicon carbide and fired at high temperatures using specialized techniques. The standard length can be customized according to the customer’s specific requirements. Main applications of silicon carbide furnace tubes include: extensive use in non-ferrous metal refining, degassing systems for aluminum products, textile dyeing machinery, zinc-aluminum refining, and finished-product processing.

　　The industrial development of silicon carbide

　　Silicon carbide boasts characteristics such as high input impedance, low noise, and excellent linearity, making it one of the rapidly developing silicon-carbide components and the first to achieve commercialization. Compared with MOSFETs, silicon-carbide devices do not suffer from reliability issues caused by defects in the gate oxide layer nor are they constrained by low carrier mobility. Their unipolar operating characteristics ensure outstanding high-frequency performance. Moreover, silicon carbide exhibits superior stability and reliability at high temperatures. The junction structure of silicon carbide typically results in a negative threshold voltage—making these devices normally-on—a feature that is highly detrimental for power electronics applications and incompatible with today's commonly used driver circuits. By introducing trench injection device technology, enhancement-mode devices capable of operating in the normally-off state have been developed. However, enhancement-mode devices often come at the cost of slightly higher forward on-state resistance. Consequently, normally-on (depletion-mode) devices are easier to fabricate and can achieve higher power densities and current ratings. On the other hand, depletion-mode devices can attain the normally-off operating state through cascading. The cascading approach involves connecting low-voltage silicon-based MOSFETs in series. Naturally, the driver circuitry required for cascaded devices is fully compatible with conventional silicon-based driver circuits. This cascaded architecture is ideally suited for replacing traditional silicon devices in high-voltage, high-power applications, directly sidestepping any compatibility issues with existing driver circuits.

Introduction to the Performance Characteristics of Silicon Carbide Furnace Tubes

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