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Analysis of Molybdenum carbide


Molybdenum Carbide is a compound composed of metallic Molybdenum and non-metallic carbon, the English name is Molybdenum Carbide, chemical formula is MoC, molecular weight is 107.95, crystal for dense hexagonal lattice, because of good thermodynamic and electrochemical properties, and widely used in various high temperature resistance, friction resistance and radiation resistance and other fields.

1. Physical and chemical properties

It is a gray powder with melting point of 2692℃, insoluble in water and alkali, slightly soluble in nitric acid, sulfuric acid and hydrofluoric acid, with high melting point, high hardness, good thermal stability, mechanical stability, wear resistance and corrosion resistance. In addition, MoC has similar electronic structure and catalytic properties to noble metals. The main catalytic reactions include hydrohydrohydrolysis, isomerization, hydrodesulfurization, hydrodenitrification, ammonia synthesis, hydrocarbon conversion and synthesis.

2. Production methods

1) Direct synthesis method: take metal molybdenum and carbon as raw materials, and then use a ball mill to dry mix them. After full mixing, put them into a heated graphite plate after pressure molding. Mo2C is initially generated, and MoC is generated by continued reaction at high temperature. Chemical equation: 2Mo+C=Mo2C; Mo + C = MoC.

2) Propanol reduction method: put molybdenum oxide into the reactor, and then continue to pass into the mixture of propanol steam and argon gas, and control the temperature of the reactor, so that molybdenum oxide is carbonized in the furnace until molybdenum carbide is obtained; After the reduction carbonization treatment is completed, argon gas is continued to be injected into the reactant to make all products cooled to room temperature MoC.

3. Application 

1) Production of molybdenum alloy. Molybdenum-zirconium-titanium alloy and molybdenum-titanium-zirconium-carbon alloy are widely used in electronic tubes, electric light source parts, metal processing tools and turbine disks due to their high strength, good electrical conductivity and low thermal expansion coefficient.

2) As steel additives. The role of molybdenum in stainless steel is to improve the corrosion resistance, strength and weldability of the product.

3) As heating electrode in glass melting furnace. Molybdenum has good compatibility with most glass components and will not produce harmful substances due to small amounts of molybdenum dissolved in the glass bath.