Crucibles are primarily used in laboratory settings for heating chemical compounds at high temperatures and in metal casting processes.
Laboratory Use: Crucibles are essential in laboratories for containing and heating chemical compounds. They are made from materials like porcelain, alumina, or metals that can withstand extreme temperatures. These crucibles come in various sizes and shapes, with lids that are typically loose-fitting to allow gases to escape during heating. Small porcelain crucibles, around 10 to 15 ml, are commonly used for gravimetric chemical analysis. The high temperature resistance of these crucibles allows them to be used in precise quantitative chemical analysis, where they might be disposed of after a single use due to the risk of contamination.
Metal Casting and Industrial Use: In metal casting, crucibles are used to melt metals and alloys in furnaces. They are designed to withstand the highest temperatures encountered in these processes and are made from materials with melting points higher than those of the materials being melted. Common materials for furnace crucibles include clay-graphite and silicon-carbide, which are durable and can resist extreme temperatures. Crucible furnaces are versatile, capable of melting a wide range of materials including metals, alloys, glass, and ceramics. They are also used in applications requiring precise temperature control, such as jewelry making, research and development in laboratories, and in dental laboratories for melting and casting dental alloys. The compact size of crucible furnaces makes them suitable for both small-scale applications and large industrial processes.
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