FAQ

We all know that the sintering of single-temperature zone tube furnace can not be separated from the heating element, at present, the tube furnace heating element is mainly silicon silver rods and silicon carbon rods. General tube furnace Furnace temperature of 1400 degrees below the use of silicon carbon rods for the heating element, and vice versa is the silicon silver rods. Then for the single-temperature zone tube furnace heating element in the What to pay attention to in the process of using? Daily maintenance and how, the following we come to a detailed understanding of the
Silicon silver rod maintenance and use of precautions.
(1), the material is hard and brittle, so it should be especially careful when loading and unloading.
(2), should be stored in a dry place, in order to prevent moisture deterioration of aluminum-plated ends
(3) The wiring should be in close contact with the white aluminum end of the cold end of the bar in order to avoid ignition phenomenon.
(4), due to the 400 - 700 ° C, easy to react with the oxygen and water vapor in the air, silicon silver rod will be pulverized, so the tube furnace is not Directly suitable for constant temperature at this temperature
(5), the electrical properties of the silicon silver rod resistance with the rise in temperature and rise, so the resistance at low temperatures is very small, the current through the very large, so the tube furnace at 250 ° C to 700 ° C, easy to react with the oxygen and water vapor in the air, so the tube furnace is not suitable for constant temperature at this temperature.
Large, so the tube furnace in 250% C below the need for current limitation.
(6), the resistance value of the silicon silver rod will not increase with the increase in the use of heating elements, so the old and new silicon silver rod can be mixed use.
The warranty and precautions of silicon carbon rods.
(1), tube furnace use, the furnace temperature shall not exceed the rated temperature for a long time, so as not to damage the heating element. It is forbidden to inject all kinds of flammable liquid and molten metal into the furnace. The furnace is not allowed to inject all kinds of flammable liquids and melted metals into the furnace.(3), molten KOH, Na0H, Na2C03 and K2C03 at red-hot temperature decomposition of SiC, silicon-carbon rods with alkali, alkali metal, sulfuric acid salt, Boride and other contact will be corroded, they should be strictly prohibited and silicon carbon rod contact.
(4), the wiring should be in close contact with the cold end of the rod white aluminum head to avoid ignition phenomenon.
(5), react with CI2 at 600C, and react with water vapor at 1300-1400%, the silicon carbon rod is not oxygenated below 1000°C, and is not oxygenated at 1350°C. The silicon carbon rod is not oxygenated below 1000°C, and is not oxygenated at 1350°C. oxidized, significantly oxidized at 1350°C, between 1350-1500C to form a protective film of Si02 attached to the surface of the silicon carbon rod, preventing SiC and then continue to amount of oxidization.