Product Name:
99% Alumina Ceramic Tube
Product Material:
High-Purity Alumina Ceramic (Al₂O₃ ≥99%). For applications requiring higher toughness or thermal shock resistance, Zirconia Toughened Alumina (ZTA) composite material can be utilized.
Material Characteristics:
Very high purity and excellent chemical stability, Outstanding high-temperature stability (long-term service temperature >1600°C), Superior electrical insulation properties (high volume resistivity), High hardness (Mohs hardness 9) and good wear resistance, Low coefficient of thermal expansion (~7.8×10⁻⁶/°C), Low thermal conductivity, Excellent corrosion resistance (resistant to various acids, alkalis, and molten metals), Surface can achieve high smoothness to meet diverse application requirements.
Application Fields:
High-temperature furnace tubes, insulating sleeves, thermocouple protection tubes in semiconductor manufacturing equipment; Liner tubes and carrier tubes for high-temperature industrial furnaces (e.g., muffle furnaces, atmosphere furnaces); Corrosion-resistant piping, reactor liner tubes in chemical and petroleum industries; Chromatography column tubes in analytical instruments (e.g., gas chromatography); Insulating, inert fluid channels, or high-temperature sterilization containers in medical and biotechnology fields; Insulating sleeves for lasers and lighting equipment.
Application Industries:
Semiconductor Manufacturing, Aerospace (High-temperature test equipment), Biomedical (Medical device components), Petrochemical, Advanced Mechanical Equipment (High-temperature furnaces, heat treatment equipment), New Energy (Solid-state battery, fuel cell components), Electronic Engineering.
Processing Difficulties:
Controlling sintering deformation and bending during the manufacture of long, thin-walled tubes with high aspect ratios; Ensuring extremely high concentricity and straightness of inner and outer diameters; Achieving high-precision internal bore machining and excellent internal surface finish; Controlling wall thickness uniformity for long tubes; Achieving precise end face machining and metallization for tube ends requiring sealing or joining; Meeting long-term structural integrity requirements under extreme conditions (e.g., high temperature & pressure, strong corrosion).
Processing Flow:
Batching and granulation of high-purity alumina powder → Isostatic pressing or extrusion molding to form tubular green bodies → Precision machining of green bodies (length cutting, end facing) → High-temperature sintering → Centerless grinding/honing of OD and ID to achieve basic dimensions → Precision CNC OD/ID grinding to target tolerances → Precision end face grinding → Internal bore polishing if required → Inspection of dimensions, roundness, straightness, and wall thickness variation → Surface cleaning and packaging
Delivery Period:
Standard dimension straight tubes: 25-45 days
Custom tubes with high precision / thin walls / long lengths / special processing (e.g., metallization, special ends): 50-90 days
The 99% Alumina Ceramic Tube is a typical tubular product made from high-purity alumina ceramic, representing a reliable piping solution for environments with extreme temperatures, strong corrosion, and high insulation requirements. With its alumina content exceeding 99%, this product maximizes the inherent properties of alumina material: a high melting point,卓越 chemical inertness, and superior electrical insulation. Whether serving as a heat treatment carrier for wafers in semiconductor processes, a conveyance channel for corrosive fluids in chemical processing, or a core heat-resistant component in high-temperature furnaces, the 99% Alumina Ceramic Tube delivers contamination-free, long-lasting, and stable performance. It is a foundational material in modern industry for handling demanding media and environments.
Key Features:
Exceptional High-Temperature Performance and Thermal Stability – The material can maintain structural strength and shape stability over long periods at temperatures above 1600°C, without softening or deforming. Its low coefficient of thermal expansion ensures minimal dimensional change during severe thermal cycling, which is crucial for high-temperature applications requiring precise alignment or serving as reaction chambers.
Superior Chemical Inertness and Purity Assurance – Its high purity and dense microstructure provide outstanding resistance to most acids, alkalis, salts, and organic solvents, with几乎 no reaction with the medium. This ensures the purity of conveyed fluids and avoids contamination caused by tube wall corrosion, making it highly suitable for semiconductor, pharmaceutical, and high-purity chemical industries.
Reliable Electrical Insulation and Mechanical Properties – Possesses very high volume resistivity and dielectric strength, making it an ideal insulating sleeve or protection tube in high-temperature, high-voltage environments. Simultaneously, its high hardness and good wear resistance allow it to withstand certain mechanical abrasion and particle erosion, ensuring long service life in harsh industrial environments.
