A porcelain crucible is a small container made of porcelain that is used in laboratory settings for various purposes such as heating, melting, crushing, and burning substances. It has a cavity or hollow space where samples or substances can be placed for these processes. Porcelain crucibles are commonly used in gravimetric chemical analysis, where small 10 to 15 ml size crucibles are preferred.
The crucible and its cover are typically made of high temperature-resistant materials such as porcelain, alumina, or inert metals like platinum. The lids are usually loose-fitting to allow gases to escape during heating. Crucibles can come in different shapes, including high form and low form, and various sizes.
In addition to laboratory use, there are also specialized porcelain furnaces used in dental applications. These furnaces are electronically-controlled devices with programmable cycles for firing dental porcelains. They are used to fuse ceramic particles and form hard ceramics for indirect ceramic or metal-ceramic restorations such as crowns, bridges, inlays, and veneers. Dental sintering furnaces are also used to process restorations made of materials like zirconia, reaching high temperatures needed to sinter the material to its final hardness.
Overall, porcelain crucibles are versatile laboratory tools used for various heating and melting processes, while porcelain furnaces have specific applications in dental laboratories for the production of dental restorations.
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