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New energy and powder calcination
Crucible
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Crucibles are important parts of chemical equipment. They are containers for melting and refining metal liquids and heating solid-liquid reactions. Crucibles are the foundation for the smooth progress of chemical reactions. There are many types, models, and specifications of crucibles. They can be selected at will, with strong applicability and ensuring the purity of the melt. The ceramic crucible is an important part of the crucible.
One of the main advantages of alumina crucibles is their ability to withstand high temperatures. Alumina has a high melting point, typically around 2050℃ (3722 ℉), which makes the crucible suitable for processes involving extremely high temperatures such as metal melting, glassmaking, and thermal analysis techniques. Alumina crucibles also have excellent chemical inertness. They are resistant to many acids, bases, and other corrosive substances, providing a stable, non-reactive environment for chemical reactions or sample preparation. When the alumina content exceeds 95%, it is often called a corundum crucible.
Corundum crucibles are sturdy and resistant to melting, high temperatures, acid and alkali, cold and extreme heat, and chemical corrosion. 99.70% corundum crucibles have good high-temperature insulation and mechanical strength in oxidizing and reducing atmospheres of 1650℃-1700℃ and can be used at a temperature of up to 1800℃ in a short term. Alumina crucibles are available in a variety of sizes and shapes depending on the application conditions.
Applications：
Glass Industry
Alumina crucibles show their interest in the glass industry in the face of the corrosive and high-temperature atmosphere of molten glass. They allow to give the desired shape to glass objects. Good quality crucibles ensure ease and safety of handling in this industry, thanks to the above-mentioned properties of alumina. In addition, the good wear resistance of aluminum oxide allows the components to last a long time despite very demanding tasks. Ceramic crucibles and combustion boxes are used for the development and manufacture of special glasses. In particular, they are used in industrial furnaces. The high purity of the material and the dense surface of the crucibles enable them to withstand the most aggressive situations in glass casting.
Metallurgy
Refractory ceramic crucibles made of alumina, zirconia, silicon carbide, silicon nitride, or a mixture of compositions are often used in metallurgy for the melting of ferrous, non-ferrous, and also precious metals. The good thermal conductivity of ceramics and their resistance to thermal shocks allow efficient and fast induction heating. On the other hand, their resistance to high temperatures, corrosion, and wear, as well as their high dimensional stability, even at high temperatures, allow for the reduction of risks when handling the crucibles. Depending on the metals to be melted, we can add anti-wetting agents to extend the life of the crucibles.
Shapes include: arc-shaped crucibles, square crucibles, cylindrical crucibles, etc.
Features:
Ø High purity
Ø Good chemical corrosion resistance
Ø Good temperature resistance
Ø Good resistance to rapid cooling and heating.
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