Caused by excessive operating temperature
Molybdenum silicon rod: molybdenum disilicide electric heating body is extruded and sintered by powder metallurgy. Silicon molybdenum rod has a cold end and a hot end, welded up by high current, the cold end is thicker, for conduction, the hot end is thinner, the resistance is larger, for heating. The melting point of molybdenum disilicide is 2030 °C, and the maximum working temperature of molybdenum silicon rod electric heating body is 1700 °C and 1800 °C two types.
