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Types of Crucible Materials

Types of Crucible Materials

The crucible is an important vessel for both scientific experiments and industrial production. It is a vessel used to hold metals for melting in a furnace. Therefore, furnace crucibles are often designed to withstand the higher temperatures involved in melting metals, which means that the crucible must essentially be made of materials whose melting point is well above the melting temperature. In addition, the crucible materials must have good strength even under extreme heat.

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Crucibles come in various metallic types, e.g., tungsten crucibles, zirconium crucibles, etc. These materials can withstand extreme temperatures during typical experiments and operations. The PBN crucible has the added advantage of being a very durable material. Below is more information about crucibles made of various materials used in laboratories and factories.

Pyro lytic boron nitride crucible (PBN crucible)

Pyro lytic boron nitride crucibles

Pyro lytic boron nitride crucibles (PBN crucibles) have excellent thermal stability, intrinsic purity and much higher mechanical strength, which makes PBN very attractive for many industries. Compared to regular boron nitride ceramics, PBN has a much higher purity and density. PBN does not need to be sintered in a conventional hot sintering process and does not require sintering agents.

Zirconium Crucible

Zirconium Crucible can be used to produce high-temperature superconducting materials and is widely used in medical devices, such as zirconium crucibles. Zirconium crucibles have high corrosion resistance, so they are mainly used as refractory materials and opacifiers, although they are also used as alloying agents in small quantities.

Tungsten Crucibles

Tungsten CrucibleTungsten is a rare, hard chemical element that has the highest melting point, high tensile strength, high density and low vapor pressure. Tungsten crucibles are vessels made of tungsten or tungsten alloys and are used for melting and calcining materials at high temperatures. Tungsten crucibles are increasingly used for a variety of purposes and are manufactured by many companies. They are manufactured in a variety of designs and shapes depending on customer requirements. Tungsten crucibles are often made with molybdenum up to 0.9% or some other elements in small amounts.

Some of the main uses of tungsten crucibles are listed below:

-Tungsten crucibles are used for growing sapphires and single crystals, and for melting rare earth metals.

-Because of its resistance to certain metal oxides and molten metals, tungsten crucibles are used in the manufacture of electronic products, thermal evaporation technology, etc.

-It is also used in heating elements for induction furnaces, metal melting and the manufacture of high temperature vessels, etc.

Molybdenum Crucible

Molybdenum CrucibleMolybdenum is a ductile and highly corrosion resistant metal. It has one of the highest melting points of all pure elements: Only the elements tantalum and tungsten have higher melting points. The molybdenum crucibles formed behave very well in heat exchange processes (HEM) and are suitable for melting and solidifying single crystals. Heegermaterialscrucibles are thin-walled and have excellent creep resistance.

Tantalum Crucibles

Tantalum CruciblesTantalum (Ta) is a very heavy, ductile, hard, dark blue-gray metal. It has high corrosion resistance. Tantalum crucibles are particularly resistant to chemicals at temperatures below 150 °C and can only be dissolved with hydrofluoric acid. It has the fourth highest melting point of all metals and is capable of forming extremely thin, protective oxide films for high quality capacitors, making it an excellent material for laboratory crucibles.



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