crucible, vessel in which a substance is heated to a high temperature, as for fusing or calcining. The necessary properties of a crucible are that it maintain its mechanical strength and rigidity at high temperatures and that it not react in an undesirable way with its contents. Porcelain porcelain [Ital. porcellana], white, hard, permanent, nonporous pottery having translucence which is resonant when struck. Porcelain was first made by the Chinese to withstand the great heat generated in certain parts of their kilns.
..... Click the link for more information. , iron, and platinum are used in the lab; graphite graphite (grăf`īt), an allotropic form of carbon , known also as plumbago and black lead.
..... Click the link for more information. is usually used in industry, but firebrick firebrick, brick that can withstand high temperatures, used to line flues, stacks, furnaces, and fireplaces. In general, such bricks have high melting points that range from about 2,800°F; (1.540°C;) for fireclay to 4,000°F; (2,200°C;) for silicon carbide.
..... Click the link for more information. is also used, especially when vessels of large capacity are needed. The chamber at the bottom of a metal-refining furnace, where the molten metal collects to be drawn off, is known as a crucible.

crucible

Pot of clay or other refractory material, used from ancient times as a container for melting metals or other materials. Modern crucibles may be small laboratory utensils for conducting high-temperature chemical reactions and analyses, or large industrial vessels for melting and calcining metal, ore, or glass, and may be made of clay, graphite, porcelain, or a relatively infusible metal.

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crucible

crucible