A crucible is a container that can withstand very high temperatures and is used for metal, glass, and pigment production as well as a number of modern laboratory processes. While crucibles historically were usually made from clay, they can be made from any material that withstands temperatures high enough to melt or otherwise alter its contents.

Copper crucible introduction

As a special and effective kind of boat, copper crucible is widely used in metallizing, electron-beam spraying as well as sintering and annealing in reducing atmosphere in electronics and light industries.
The copper crucible, manufactured by the special production line in our corporation, can provide reliable guarantee of product quality for the users by adopting excellent copper materials with high purity, advanced techniques as well as special treatment to the product surfaces.
Copper crucible furnace is mainly used for sapphire crystal growth furnace, rare earth smelting vessel, the quartz glass smelting furnace. According to your drawing, we can supply all kinds of high temperature crucible.
Copper crucible and other parts can be used for sapphire crystal growth and rare-earth melting due to their high temperature resistance, low pollution and other excellent characteristics.
Stanford Materials supplies all kinds of copper crucibles used in the process of sapphire growth and rare-earth melting and we can manufacture the products according to customers' drawings and specific requirements.

copper crucible picture

Advantages for copper crucible

1. High density
2. High strength
3. Low electrical resistivity
4. Low thermal expansion
5. Anti-erosion

Copper Crucibles for Remelting Furnaces

KME manufacture and design copper crucibles of any shape or size, used in the ESR (Electro Slag Remelting) and VAR (Vacuum Arc Remelting) process to refine alloys into impurity free materials.
KME can design and manufacture individual moulds or complete mould assemblies and accessories depending on the customer's requirement. Our unrivalled experience together with our inherent expertise in copper makes KME the best partner to provide flexible economic solutions.

Smelting and melting of copper and its alloys such as leaded bronze were smelted in crucibles similar to those of the roman period which have thinner walls and flat bases to sit within the furnaces. The technology for this type of smelting started to change at the end of the Medieval period with the introduction of new tempering material for the ceramic crucibles. Some of these copper alloy crucibles were used in the making of bells. Bell foundry crucibles had to be larger at about 60 cm (Tylecote 1976: p73). These later medieval crucibles were a more mass produced product.

The cementation process, which was lost from the end of the Roman to the early Medieval period, continued in the same way with brass. Brass production increased during the medieval period due to a better understanding of the technology behind it. Furthermore, the process for carrying out cementation for brass did not change greatly until the 19th century. However, during this period a vast and highly important technological innovation happened using the cementation process, the production of steel. Steel production using iron and carbon works in the same way as brass with the iron metal being mixed with carbon to produce steel. The first examples of cementation steel is wootz steel from India (Craddock 1995: p276), where the crucibles were filled with the good quality wrought iron and carbon in the form of organics such as leaves, wood etc. However, no charcoal was used within the crucible. These early crucibles would only produce a small amount of steel as they would have to be broken once the process has finished.

By the late Medieval period steel production had move from India to modern day Uzbekistan where new materials were being used in the production of steel crucibles, for example Mullite crucibles were introduced. These were sandy clay crucibles which had been formed around a fabric tube. These crucibles are used in the same way as other cementation vessels but with a hole in the top of the vessel to allow pressure to escape. Our crucibles include bronze crucibles, brass crucibles and copper crucibles.

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