Ultra-long & 99.9% high-purity alumina ceramic protective tube is a kind of long-size special corundum ceramic pipe, manufactured with 99.9% ultra-high purity alumina as raw material, through ultra-fine powder preparation, precision forming, high-temperature pressureless/atmosphere sintering and precision machining. It features high density, excellent high temperature resistance, corrosion resistance, electrical insulation and thermal shock resistance, serving as a key structural and functional component under high-temperature, high-purity and strong corrosion working conditions.
2.Core Technical Parameters
- Alumina Purity: ≥99.9%
- Total Impurities: ≤100 ppm
- Bulk Density: ≥3.92 g/cm³
- Porosity: ≤0.05%
- Bending Strength: ≥450 MPa
- Long-term Service Temperature: 1600~1700℃
- Volume Resistivity: ≥10¹⁴ Ω·cm
- Product Characteristics: Ultra-long dimension, high straightness, uniform wall thickness, smooth inner wall
3.Application Fields
- Metallurgical Industry: Thermocouple protective tubes for molten metal temperature measurement at high temperature
- Photovoltaic & Semiconductor: High-temperature furnace tubes, wafer heat treatment bearing tubes, high-purity atmosphere protective tubes
- Glass Industry: Glass liquid guiding tubes, high-temperature monitoring protective sleeves
- Chemical & Anti-corrosion: Strong acid and alkali medium transportation, reactor lining protective tubes
- Scientific Research & Testing: Protective components for thermal analysis instruments and high-temperature simulation test devices
Post time: Mar-26-2026