The main differences between silicon - molybdenum rods and silicon - carbon rods in high - temperature electric furnaces lie in their operating temperatures, applications, materials, appearances and scopes of application.

The operating temperature range of silicon - carbon rods is usually around 1000 - 1450°C, while with the new hot - bending process, silicon - molybdenum rods can reach a temperature of over 1900°C.

Silicon - carbon rods are commonly used in small box - type electric furnaces, experimental electric furnaces and muffle furnaces, while silicon - molybdenum rods are suitable for large muffle furnaces, box - type furnaces, tube - type furnaces, as well as industries such as ceramics, magnetic materials, glass, metallurgy and refractory materials.

Silicon - molybdenum rods are resistance - heating elements based on molybdenum disilicide, while silicon - carbon rods are rod - shaped non - metallic high - temperature electrothermal elements made from high - purity green hexagonal silicon carbide as the main raw material and recrystallized by siliconization at a high temperature of 2200°C.

The surface of silicon - molybdenum rods is relatively smooth. The cold end is half thicker than the hot end. Silicon - molybdenum rods are solid. The welding marks on the contact surface with silicon - carbon rods are relatively obvious, and they are hollow.

Silicon - carbon rods are suitable for small electric furnaces and experimental electric furnaces that require high temperatures, while silicon - molybdenum rods are more suitable for large - scale industrial high - temperature kilns.

In conclusion, the applications of silicon - molybdenum rods and silicon - carbon rods in high - temperature electric furnaces each have their own focuses, and the choice of which one to use depends on specific application requirements and environments.