Silicon carbide crucibles are ceramic, deep-bottomed, bowl-shaped containers. They are used when solids need to be heated at high temperatures, as they can withstand higher temperatures compared to glassware. When using a crucible, it is generally not filled to the brim with molten material to prevent spillage due to heating and to allow air to circulate freely for possible oxidation reactions. Due to their small base, crucibles are usually placed on a clay triangle for direct heating over a flame. They can be positioned upright or tilted on an iron tripod, depending on the requirements of the experiment. After heating, a crucible should not be immediately placed on a cold metal surface to avoid cracking from rapid cooling. It should also not be placed directly on a wooden surface to prevent scorching or fire hazards. Silicon carbide crucibles are primarily used in metallurgy, casting, machinery, chemical engineering, and other industrial sectors. They are widely employed in the smelting of alloy tool steels and non-ferrous metals and their alloys, offering good technical and economic efficiency.