Crucibles and saggars are containers used for high-temperature chemical reactions or metal melting, categorized into various types based on application requirements and material selection. Crucibles include porcelain crucibles, graphite crucibles, silica crucibles, and alumina crucibles, each suitable for different temperature ranges and chemical environments. Saggars encompass clay saggars, alumina saggars, silicon carbide saggars, and metal saggars, utilized for firing ceramics in kilns, high-temperature ceramic processes, and firing processes in the glass industry. Choosing the appropriate crucible or saggar ensures optimal performance and durability in various high-temperature applications.