Fire Clay Crucible Made in China

Crucible is a high-temperature container used in the laboratory for melting samples or burning precipitation. It is a cup-shaped vessel with a large top and a small bottom, like a truncated cone. It is generally made of extremely refractory materials such as clay, graphite, porcelain clay or metals that are difficult to melt. Crucibles were first used in alchemical experiments to hold liquids or solids (glass, metal or other substances) for high-temperature heating; containers used to melt metals in metallurgy are also called crucibles.
The material of the crucible is required to be heat-resistant, relatively strong, and not easy to react chemically at high temperatures. Traditional crucibles are made of ceramics, and modern ones are made of metals such as graphite, platinum, rhodium, nickel, and chromium. Some crucibles have lids made of the same material.