As core product categories, alumina ceramic crucibles and alumina ceramic bars feature outstanding advantages including high temperature resistance, corrosion resistance and high hardness. They have become key basic components driving technological upgrading across industries. The domestic market scale keeps expanding, and the process of domestic substitution is advancing steadily.
Both alumina ceramic crucibles and alumina ceramic bars are made of high-purity alumina (Al₂O₃) as the core raw material through multiple processes including forming, sintering and precision machining, and are among the most widely used products in the alumina ceramic family.
Alumina ceramic crucibles are generally made of high-purity alumina with a purity of over 99%. They can be used long-term at temperatures below 1600℃ and withstand even higher temperatures for short periods.
Featuring excellent chemical inertness, they operate stably in reducing, oxidizing and vacuum atmospheres, and have strong resistance to acid and alkali media. Meanwhile, they cause no impurity contamination.
Widely applied in laboratory sample melting, purification of metallic and non-metallic materials, calcination of semiconductor precursors and other scenarios, they deliver a substantial improvement in service life and stability compared with quartz and metal crucibles.
Alumina ceramic bars feature high hardness, excellent wear resistance and superior electrical insulation properties. Their Mohs hardness reaches up to 9, second only to diamond and boron carbide. With a density only about half that of stainless steel, they also boast far stronger corrosion resistance than traditional metal bars.
At present, this product has been widely applied in multiple fields:
In industrial machinery, it is used for wear-resistant shafts, guide rods, sealing rings and other components, replacing metal materials to greatly reduce wear and loss;
In electronics and electrical engineering, it serves as high-voltage insulators and positioning rods for semiconductor equipment, ensuring the stable operation of circuit systems;
In the medical field, high-purity alumina ceramic bars are applied to artificial joint heads and dental implants, achieving breakthroughs in clinical application thanks to good biocompatibility;
In the high-temperature metallurgy industry, it is adopted as temperature measuring sleeves and crucible support rods, perfectly adapting to extreme working environments.
