The Alumina ceramic high-temperature corundum sleeve assembly with a special-shaped underflow nozzle is an industrial component with excellent performance in high-temperature, wear-resistant, and corrosion-resistant properties.

Component Composition and Features

· Alumina ceramic high-temperature corundum sleeve: The core material of the corundum sleeve is 99.9% pure α-alumina (Al₂O₃). Sintered at 1800°C, it forms a dense structure with a Mohs hardness of 9. It offers high-temperature resistance, sustaining temperatures up to 1600°C and short-term thermal shock resistance up to 1800°C. It is also corrosion-resistant to 99% of acids and alkalis, molten metals, and halogen gases (except hydrofluoric acid), and exhibits zero metal ion precipitation, meeting semiconductor-grade cleanroom requirements.

Applications

· Semiconductor Manufacturing: It can be used as a core carrier in diffusion furnaces, resistant to corrosion in hydrogen atmospheres up to 1300°C, and reduces contamination rates to below 0.1ppm, meeting semiconductor-grade cleanroom requirements. Major manufacturers such as TSMC and SMIC have adopted it. New Energy Industry: During the lithium battery material sintering process, Alumina Tubes coated with silicon nitride can extend their service life to over two years, increasing the purity of cathode materials to 99.99%. For example, CATL's Yibin base has reduced energy consumption per GWh of production capacity by 15% through the alumina tube upgrade.

Chemical Industry: They can be used in chemical reactors and catalyst supports, resisting corrosion from corrosive substances such as acids and alkalis, maintaining stable performance in high-temperature, highly corrosive chemical production environments.

High-Temperature Metallurgy: In titanium alloy smelting, alumina composite tubes (Al₂O₃-ZrO₂) withstand corrosion from molten titanium at 1700°C and have a lifespan exceeding 300 heats, significantly improving the lifespan of graphite crucibles. Trials at Baosteel Special Steel have shown annual savings of over 8 million yuan in consumables costs per production line.