FAQ

Here to give you a little knowledge of silicon molybdenum rods, please listen attentively to the little ones oh! There's no need to miss out on this often encountered dilemma in life's ups and downs. Follow me to master it!
Silicon molybdenum rod is a heat-resistant, corrosion-resistant, oxidation-resistant, rapid heating of a non-metallic material high-temperature electric heating materials, in the air oxidation standard higher application temperature reaches 1500 ℃. Despite its long service life, please as far as possible do not have to let the silicon molybdenum rod exterior temperature is too high, that is, must become smaller furnace temperature and silicon molybdenum rod temperature difference. However, there are some elements that can lead to a very large impact on the service life of the component.
⒈ how to solve the appearance of abnormal reddening of the silicon molybdenum rod?
Silicon molybdenum rod red is to be divided into what the situation, what position red to clarify the silicon molybdenum rod is not anomalous, we all know, silicon molybdenum rod is a non-metallic material converted into energy electromagnetic energy electric heating materials, hot red after connecting the power supply is all normal.
But in our discovery of its rod end of the redness of the words that is a kind of anomaly, if there is that kind of problem we need to pay attention to, if there is that kind of problem we have to check whether the transmission line connection is not tightened, if the rod end of the spray aluminum used for wiring to produce air oxidation or skinning, if there is that kind of problem, we can carry out a simple solution to take a piece of sandpaper to carry out sanding and polishing! It can be, sanding and polishing neatly Dahu package on the aluminum platinum, and then coiled around the transmission line and tighten.
After the solution, if you find that he is still red, then it is the silicon molybdenum rod itself, that condition in the technical professional known as the tube red, is a shortcoming, then only is to dismantle and replace the new silicon molybdenum rods, or else it will damage the transmission line, resulting in accidents! Folks should pay attention to oh!
Pake silicon molybdenum rods and silicon molybdenum rods difference
　Silicon molybdenum rod heater and carbon carbon composite materials, the same, room temperature state organic chemical properties are very smooth, acid, alkali corrosion resistance. However, when applied at high temperatures, it and the atmosphere of oxygen, water vapor, hydrogen, nitrogen, vapor, and its alkali chemicals can produce reflections, and carbon carbon composite heater life-related organic chemical properties. Carbon-carbon composite heater general process performance, in which the more critical characteristic is the resistance, which is accompanied by a temperature shift, characterized by residual semiconductor. Silicon molybdenum rod heaters have low resistance at 500-600 degrees Celsius; from room temperature to 500 degrees Celsius, the resistor is characterized by a negative shift in temperature; above this temperature range, the resistor is characterized by a positive shift in temperature. Carbon-carbon composite heaters are generally used above 800C, which is right in the positive characteristic shift range, so the temperature is very easy to manipulate and adjust.
Carbon carbon composite heater and water vapor reflection carbon carbon composite heater can be produced at lower temperatures with water vapor, silicon molybdenum rod heater look key has U-shaped, W-type, this is mainly because of the silicon molybdenum rod calcined products at high temperatures in the thermosetting plastics is very large in order to prevent the rod-shaped product level placed under its own weight efficacy of the deformation and is conducive to get rid of the moisture and heat pescetarian uplift. The font at the top of the non-heating hot is thickened to enhance the total area of the cross-section so that the resistor is reduced.
　Molybdenum silicide rod heater production manufacturing process. The key raw material: molybdenum silicide is generated by melting the metal materials Mo and Si at high temperatures, and the extrusion molding method is generally chosen to form each of the intermediate hot section and the non-hot section at the top. Subsequently, the molybdenum is calcined at high temperatures in a non-air oxidizing atmosphere, e.g. in radon gas. After calcination, the middle hot section and the top non-hot section are electro-welded together at high temperature. Subsequently, the tip is plated with aluminum metal to turn it into a wiring end.
　In an air-oxidizing atmosphere at temperatures above 950 degrees Celsius, the molybdenum silicide iron skin is air-oxidized and transformed into a continuous protective layer of quartz glass tubular plastic film, which is solidly fused to the surface of the heater, thus preventing the heater from being subjected to further air-oxidation.
　When we carry out the application, we should pay attention to the fact that all the vapors that can reflect with the Sio2 plastic film, such as radon gas, etc., can destroy the Sio2 protective layer. It should be noted that radon gas in the water component of molybdenum silicide heater application temperature has a very big influence, silicon molybdenum rods in the vacuum pump at high temperatures can produce enhancement, the higher the value of vacuum, molybdenum silicide hot higher application temperature limit the lower.