A silicon carbide crucible is a deep-bottomed, bowl-shaped ceramic container. Crucibles are essential when heating solids in a high-flame furnace because they can withstand higher temperatures than glassware. This is why silicon carbide crucibles are widely used. This article will first introduce the use of silicon carbide crucibles, hoping to be helpful.
When using a crucible, it is generally not filled too full with molten material to prevent it from splattering and to allow air to enter and exit for possible oxidation reactions freely. Due to its small bottom, the crucible usually needs to be placed on a clay tripod for direct heating. The crucible can be placed upright or at an angle on the tripod, depending on the experimental requirements. After heating, the crucible should not be immediately placed on a cold metal table to avoid cracking due to rapid cooling. It should also not be placed immediately on a wooden table to avoid damaging the surface or causing a fire. The correct method is to leave it on the tripod to cool naturally or place it on an asbestos mat for slow cooling. When processing solids at high temperatures, crucibles are necessary because they can withstand higher temperatures than ordinary glassware. Silicon carbide crucibles are highly recommended, and Zibo Shengkai New Material Co., Ltd. will now introduce their industrial value.
As the name suggests, the main raw material of silicon carbide crucibles is silicon carbide, and its main characteristics are derived from it. Silicon carbide, also known as corundum, has the chemical formula SiC and is a material produced by high-temperature smelting of raw materials such as quartz sand, petroleum coke (or coal coke), and sawdust in an electric resistance furnace. Black silicon carbide, with a SiC content of approximately 95%, is highly tough and has high-temperature resistance. Silicon carbide crucibles are made from this type of black silicon carbide. During high-temperature use, silicon carbide crucibles have a low coefficient of thermal expansion, excellent resistance to rapid heating and cooling, and good resistance to acid and alkali corrosion, making them a product with excellent chemical stability. Silicon carbide crucibles, due to their excellent performance, perform well in metallurgical, mechanical, and chemical industries.
Their superior performance makes them ideal for metal smelting and alloy melting, resulting in outstanding technical and economic benefits in industrial applications.
