... , 4/9, 6/12, 9/18, 12/24 etc. Type: I, U, W, Pole, and U-right, etc MoSi2 heating element ... , 4/9, 6/12, 9/18, 12/24 etc. Type: I, U, W, Pole, and U-right angle shapes, etc And ... oxidizing atmosphere. It will form the SiO2 film which can keep the element from being melted. During the oxidizing process, the SiO2 protecting film is formed ...