Application and Production Method of Molybdenum Crucible

Molybdenum crucible is made of Mo-1 molybdenum powder. Its working temperature is 1100℃~1700℃. It is mainly used in metallurgical industry, rare earth industry, monocrystalline silicon, solar energy, artificial crystal and machining industries.

Because molybdenum has the characteristics of high temperature resistance and low pollution, molybdenum crucibles are widely used in core containers in industrial furnaces such as sapphire single crystal growth furnaces, quartz glass melting furnaces, and rare earth smelting furnaces. Its working temperature environment is generally above 1100 ℃. Especially for sapphire single crystal growth furnace, due to its high purity, high density, no internal cracks, accurate size, smooth inner and outer walls, etc., it is very important for the success rate of seeding, crystal pulling quality control, Decrystalline sticking to the pan and service life play a key role.

Molybdenum crucible is a kind of container mainly used in metallurgical industry, rare earth industry, monocrystalline silicon, solar energy, artificial crystal and machining industries. Environment. A molybdenum crucible manufacturing process is introduced below, and its specific steps are as follows:

1) Using molybdenum powder as raw material;

2) Formed by cold and other precision press;

3) Sintering treatment;

4) After sintering, use circulating water to cool down the intermediate frequency sintering furnace for 9-10 hours;

5) Take out the molybdenum rod and heat it in the muffle furnace;

6) Take out the molybdenum rod, use an air hammer with an impact force of 1000 kg, and forge it 30-40 times;

7) Machining is used to make grooves, outer circles and end faces, so that the surface roughness of the molybdenum crucible reaches Ra1.6-Ra3.2μm, and the molybdenum crucible is made.

The molybdenum crucible manufactured by this process has the advantages of reducing cost and requiring less equipment. It is first made into a solid powdery cylindrical billet, and then undergoes secondary high-temperature crystallization to refine the grains, which improves the strength and resistance of the crucible. high temperature.