A crucible is a vessel used to melt materials such as metals and ceramics. Crucibles are important in industrial production, especially in metallurgy, chemistry, oil refining, and other fields. Crucibles are mainly used in the following occasions: Metal smelting: In the metallurgical industry, crucibles are an important tool for smelting metals. The metal is melted by placing it in a crucible and heating it to a high temperature. Sintered ceramics: The crucible is an important utensil in the process of making ceramics. When sintered in a crucible, the ceramic material becomes hard and durable. Fine chemical experiments: In chemical experiments, chemical substances can be heated in a crucible to make them react more thoroughly.
The history of the development of the crucible The history of the crucible can be traced back to ancient Babylon around 2000 BC. At that time, people used graphite and quartz to make some crucibles for melting and alloying steel. In China, the invention of the crucible can be traced back to the Spring and Autumn Period and the Warring States Period. According to historical records, blacksmiths at that time had used a tool called a "silver crucible" to make steel.
This crucible is made of graphite and can withstand high temperatures. It has been widely used in my country's metallurgical industry and has been continuously improved and optimized for long-term use. During the Middle Ages, the European metallurgical industry began to develop. Quartz, graphite, and ceramic materials are used to create more durable crucibles for the production of high-quality steel and copper alloys.
In the 18th century, with the rise of modern industry, the manufacturing technology of crucibles was further improved. People began to use new materials such as diamonds and ceramics to make crucibles and adopted more sophisticated production processes. Today, crucibles have become an indispensable tool in industrial production. Widely used in chemical, metallurgy, pharmaceutical, food processing, and electric power fields all over the world.
Crucible material and manufacturing process There are many kinds of crucible manufacturing materials, commonly used quartz, graphite, ceramics, diamond, and so on. Different materials have different properties and are widely used in different industries. Quartz crucible: It has good high-temperature resistance and chemical corrosion resistance, so it is commonly used in chemical, electrical, and other industries. Quartz crucibles are usually made of quartz sand or quartz glass. Graphite crucible: It has good electrical conductivity and thermal stability, and is one of the most commonly used materials in metallurgy and electric power industries. Graphite crucibles can be made by heating graphite powder.
Ceramic crucible: Usually made of high-temperature resistant materials such as alumina and silicon nitride, it has excellent chemical corrosion resistance and high-temperature resistance. Diamond crucible: a crucible made of new materials with extremely high heat resistance and corrosion resistance, suitable for high temperatures and strong acid and robust alkali environments. Diamond crucibles are usually manufactured using chemical vapor deposition techniques. The manufacturing process of the crucible mainly includes several methods such as injection molding, extrusion, molding, pressing, and molding. Different materials and specific uses require different manufacturing processes. Generally speaking, the manufacture of crucibles requires multiple fine processing and sintering to ensure their high strength, heat resistance, and chemical stability.
Why doesn't the crucible melt? The crucible is made of high-temperature-resistant materials, which generally have a high melting point and are not easy to melt. For example, graphite crucibles have a melting point of about 3000°C, while quartz crucibles have a melting point of 2713°C. These materials can withstand high temperatures before melting, so they can be used to make crucibles.
In addition, the material of the crucible usually has good thermal conductivity, which can quickly and evenly distribute the temperature inside the crucible. This helps to avoid localized melting or cracking of the crucible at high temperatures. In short, the high-temperature resistance and good thermal conductivity of the crucible are important reasons why it will not melt. This feature makes the crucible an indispensable tool in industrial production and is widely used in processes such as smelting metals, making ceramics, and chemical reactions.