Silicon Carbide Crucible

Silicon carbide crucibles are designed for melting nonferrous metals such as copper, silver, gold and lead-zinc in ground furnaces or electric furnaces. Their features include high oxidation resistance, less pollution and excellent thermal conductivity.

Crucibles often sustain damage due to overheating; longitudial cracks extending from bottom edge to top can result in this scenario, but you can avoid it by heating slowly.

High-Temperature Resistance

Silicon carbide crucibles are highly resistant to high temperatures, making them the ideal choice for metal melting and casting processes. Not only can they hold molten metal in place and maintain an optimal temperature during melting or refining processes but their high temperature resistance also prevents contamination while safeguarding product quality.

These crucibles are frequently employed in metallurgy and foundry applications for melting, casting and refining a range of materials. Not only can these crucibles offer greater levels of control than other options on the market; they’re also highly corrosion- and thermal shock-resistant making them suitable for use even under extreme conditions – not forgetting easy cleaning. Durability also comes standard.

Preheating crucibles before adding any materials is key, and workers must be wary about adding too many additives. They should also take great care in cleaning out sticky residue after each use – failure to do this can cause the slag inside to overheat and shorten its lifespan. Finally, storage in dry environments is key along with preheating them at 150-200 degrees Celsius prior to adding materials; additionally workers must periodically check its temperature so it does not overheat too quickly.

Corrosion Resistance

Silicon carbide graphite crucibles are an excellent choice for melting non-ferrous metals and alloys in foundries, offering high chemical resistance and thermal shock stability as well as being resistant to oxidation and corrosion. You can use them with various types of furnaces – including fuel fired furnaces.

Before using your crucible, ensure it is completely clean and dry. Gently scrape away any melted metal residue inside, using a knife if necessary to clear off its surface, and using water for further cleansing; after rinsing off with water you can wipe down with a cloth afterward and leave to dry before making use.

Once your crucible is clean and dry, the melting process can begin. Fill your crucible with fused potassium bicarbonate (solid form). Additionally, copper sulphate, aluminum sulfate or sodium carbonate may be added as additional chemicals to the mix if necessary. Heat it slowly on a burner until all the bicarbonate melts – taking care to do it gradually to avoid damage to your equipment.

Your choice of metal and alloy will dictate which features should make up a suitable crucible. For instance, when melting iron-based alloys in a fuel-fired furnace you will require one with an anti-oxidation glaze capable of resisting damage from oxygen exposure as well as one that can meet temperature range requirements.


Silicon carbide crucibles are indispensable tools for scientists and researchers working with high-temperature chemicals, as their inertness makes them indispensable tools. Their resistance to acids, bases, and reactive substances ensure accurate experiment results without contamination from acids or bases; additionally, these crucibles resist damage caused by repeated heating/cooling cycles – an advantage over other laboratory crucibles which tend to cracking/chipping easily.

This type of crucible is ideal for non-ferrous metal smelting and holding metal materials during casting processes, including gold, silver, copper, aluminum, lead-zinc and various rare metals. Furthermore, this style crucible can also be used to melt silica sand at high temperatures for ceramic glaze production. Furthermore, they come in different shapes and sizes to meet various ceramic glaze production needs and welding or soldering is possible when needed.

For maximum long-term performance and safety of a silicon carbide graphite crucible, it is vital to clean it after each use and regularly remove any material residues or deposits from its interior surface. An accumulation of dross in a crucible may lead to it leaking during subsequent melting operations and accelerate chemical corrosion of its contents – this in turn increases pressure during cooling processes which increases internal expansion pressure leading to potential damage of its walls and possibly cracking or breaking. To combat this issue it is recommended to utilize slag scraper blades before adding material. Alternatively it should also be heated slowly before being introduced into its contents – also recommended.


Silicon carbide crucibles are durable enough to withstand high-temperature molten metals used for jewelry making and casting, including aluminum, copper and nickel used by industrial manufacturing processes. Their resistance to corrosion and oxidation make them the perfect choice when handling such metals as jewelry-grade aluminum alloys for casting or jewelry design; additionally their inert nature protects them against chemical reactions that could compromise structural integrity or shorten lifespan; their resilience makes them great options for use in chemical labs or research facilities.

These crucibles can last for years when used correctly; however, improper handling and storage could shorten their lifespan significantly. To protect against physical damage to these crucibles during charging procedures, it’s crucial that proper charging practices be observed, which involve first loading smaller charge materials before gradually adding heavier ones – this helps avoid chips or cracks from occurring during charging processes.

Maintaining clean crucibles is of the utmost importance as dross and slag build-up may adversely impact metals melted within. Furthermore, slag may damage their surfaces by leaving depressions that need to be filled in eventually; when net-like cracks appear or depressed surfaces appear on crucible surfaces it indicates its lifespan has expired and needs replacing immediately.

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