The electrical properties of silicon carbide and features

Recrystallized silicon carbide is silicon carbide products. It is the use of silicon carbide semiconductor crystals under high temperature performance and chemical stability of the product characteristics of the processed and manufactured high heating element. Compared with other electric heating elements, silicon carbide has unit area heat, warming fast, long life cycle, high temperature, stable performance, easy maintenance, and many other advantages. Silicon carbide is currently widely used in a variety of industries, mainly magnetic materials, electronic ceramics, engineering ceramics, refractories, abrasives and other manufacturing; metal thermal processing and powder metallurgy industry; glass industry melting and refining process; petrochemical, textile, food industry and paper industry and other baking step. Silicon carbide has a large specific resistance in the air heating, the surface temperature of the heat generating portion 1050 ± 50 ℃, back pack sprayer the resistance was 600-1400Ω-mm2 / M. resistance of silicon carbide with temperature change from room temperature to 800 ℃. Resistance - Temperature characteristic curve is negative, the temperature is higher than 800 ℃ is positive for the silicon carbide with a pressure regulating device. Send initial power voltage to half its normal operating voltage, and stability over time and then gradually increase the voltage. Silicon carbide so it will not break because of rapid warming caused. Silicon carbide continuous long life; intermittent short life. Silicon carbide is used to select a reasonable surface load density and temperature. Temperature should not exceed 1650 ℃; harmful gases in the environment but also to prevent the use of silicon carbide and harmful gases react chemically. Replacing silicon carbide should be used, and the furnace is running close to the resistance of silicon carbide silicon carbide,water pressure sprayer  if necessary, replace the entire furnace silicon carbide, which will help improve the life of silicon carbide, silicon does not come unloading carbon rod, if appropriate resistor values, you can also put in an electric furnace used in the late run.

Silicon carbide to prevent molten metal splash, splash molten metal easily lead to broken rods. Preventing transmission of alkali, alkaline earth metal oxides and alkaline etching of silicon carbide. Frequently observed ammeter, voltmeter and thermometer readings are normal; cold end clamps are loose movement, black oxide or ignition; silicon carbide is broken; silicon carbide heating portion red heat is uniform.