For ultra-clean, ultra-high-temperature, and high-insulation applications where zero tolerance for impurities is required, high-purity alumina ceramic tubes are custom-engineered to meet the most demanding precision needs. Manufactured from 99%–99.7% ultra-high-purity alumina, powders are handled in a dust-free environment, precision-extruded, and sintered at 1700℃. The resulting tubes achieve impurity levels below 5 ppm, with no powder shedding or crystallization.
These tubes maintain dimensional stability during continuous operation at 1600℃, without deformation or crystallization, and insulation performance remains uncompromised at high temperatures, making them ideal for semiconductor, photovoltaic, and laboratory applications.
The inner walls are smooth and ultra-clean, ensuring unobstructed flow and minimal fouling. Designed for diffusion furnaces, high-temperature experimental furnaces, and high-purity fluid transport, these high-purity alumina tubes serve as core components in ultra-clean environments, delivering contaminant-free, stable, and reliable performance.
Specifications
- Material: 99% / 99.5% / 99.7% high-purity alumina
- Density: ≥3.90 g/cm³
- Continuous Operating Temperature: 1600℃
- Short-Term Maximum Temperature: 1750℃
- Insulation Strength: ≥22 kV/mm
- Water Absorption: <0.005%
- Impurity Content: <5 ppm
- Dimensions: Outer diameter 3–80 mm, Inner diameter 1–60 mm, Length 20–1500 mm
Performance Advantages
Ultra-High Temperature Structural Stability: The ultra-high-purity material has an extremely high melting point. Continuous operation at 1600℃ does not cause softening, deformation, or crystallization. Dimensions remain stable under high-temperature sintering and heating conditions.
Exceptional Insulation and Dielectric Strength: Dense, pore-free ceramic body ensures insulation does not degrade at high temperatures. Withstands high-voltage breakdown tests, effectively eliminating leakage and creepage, suitable for advanced electrical insulation applications.
Ultra-Clean and Non-Contaminating: High-purity raw materials and fully dust-free production prevent powder shedding and heavy metal leaching, ensuring no contamination of media or equipment. Ideal for medical, semiconductor, and other ultra-clean manufacturing environments.
Applications
Used extensively as insulating components in semiconductor manufacturing, high-temperature protective tubes in photovoltaic equipment, laboratory instruments, high-purity fluid transport, high-temperature furnace liners, medical testing equipment parts, and vacuum sealing assemblies. Widely applicable in semiconductor, new energy, medical research, and precision manufacturing industries requiring ultra-clean, high-temperature conditions.
Dust-Free Production Environment
Our factory operates fully enclosed, dust-free production workshops for high-purity ceramics. Strict control of production dust and contaminants is maintained throughout mixing, forming, and sintering, ensuring ultra-clean products from the source to meet the strict cleanliness standards of high-end industries.
Rigorous Testing Standards
Following ISO9001 quality management system standards, equipped with impurity analyzers, high-voltage testers, and high-temperature testing machines. Every batch is tested for purity, insulation performance, and high-temperature stability. Non-conforming products are rejected, ensuring consistent quality for every batch.
Customization and Adaptation Services
Supports non-standard sizes, special shapes, and tight tolerances. Capable of producing thin-walled, extra-long, and uniquely shaped tubes to fit various high-end precision equipment. Fast 7-day prototyping available, offering tailored solutions for each customer's specific application.
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