99% alumina ceramic tube

99.7 alumina ceramic tube refers to high-purity ceramic pipes with an Al₂O₃ content ≥ 99.7%, known for exceptional performance in extreme environments.   Core Properties • High-Temperature Resistance Continuous working temp: 1600°C – 1730°C; Peak: up to 1800°C • Mechanical Strength Hardness: 12.2 – 13.5 GPa (Mohs ~9) Flexural strength: 300 – 340 MPa Density: ~3.6 g/cm³ • Electrical Insulation Volume resistivity: >10¹⁵ Ω·cm Dielectric strength: >15 kV/mm • Chemical Stability Inert to most acids, and molten metals   • Thermal Stability Low thermal expansion: ~7.3×10⁻⁶ /°C   Typical Applications • High-temperature furnace tubes & thermocouple protection tubes • Insulators & components for electronics/semiconductors • Wear-resistant liners & pipes for chemical/metallurgy • Laboratory & medical equipment   Advantages Over Lower Grades (95% /99%) • Superior purity (minimizes contamination) • Higher max temperature • Better corrosion & wear resistance • Superior insulation at high temps   Common Specifications • OD: 1–200 mm • Length: 100–1000 mm (customizable) • Wall thickness: 0.5–20 mm • Bore: Single / multi-bore (2/4 holes) • Tolerance: ±0.01 mm (precision machining)  

Longer Service Life: Wear resistance and corrosion resistance are 5-10 times higher than metal pistons—reduces maintenance costs and downtime (e.g., ceramic engine pistons last 2-3x longer than aluminum alloy versions). Higher Operating Temperatures: Withstands 1000°C+ temperatures (vs. 300-500°C for metal)—enables machinery to operate at higher efficiencies (e.g., gas turbines with ceramic pistons have 10-15% higher thermal efficiency). Improved Energy Efficiency: Low density (silicon nitride) reduces reciprocating inertia, and low friction reduces energy loss—automotive engines with ceramic pistons can achieve 5-10% better fuel economy. Corrosion Resistance: Inert to most acids, alkalis, and seawater—eliminates rust and material degradation in harsh chemical/marine environments. Reduced Lubrication Needs: High wear resistance allows dry or minimal lubrication—lowers maintenance costs and avoids lubricant contamination in food/chemical applications.