al2o3 ceramic tube is an industrial ceramic tube made primarily from alumina. It is commonly used for thermocouple insulation, heating-element sleeving, temperature-sensing wire isolation, laboratory furnaces, and industrial thermal processing equipment, where it provides electrical insulation, heat isolation, and structural support. It helps solve oxidation, dielectric breakdown, short service life, and poor stability problems associated with ordinary metal or low-grade insulating tubes in high-temperature, corrosive, and continuously heated environments.
Specifications
|
Parameter |
Value |
|
Material |
Alumina ceramic |
|
Alumina Content |
96%-99.7% |
|
Structure |
Hollow ceramic tube |
|
Density |
3.75-3.95 g/cm³ |
|
Hardness |
12-14 GPa |
|
Dielectric Strength |
9-11 kV/mm |
|
Volume Resistivity |
>10¹⁴ Ω·cm |
|
Thermal Conductivity |
25-33 W/m·K |
|
Service Temperature |
1600-1700°C |
Key Features
- High-temperature insulation
- High dielectric strength
- Good chemical resistance
- High-temperature stability
Applications:
- Thermocouple protection tubes
- Insulating sleeves for heating elements
- Tube furnaces and furnace-interior insulating passages
- High-voltage electrical insulating sleeves
- Sensor protection sleeves
- Insulating tube parts for laboratory equipment and chemical installations
Packaging & Shipping
Compartmentalized or layered packaging is used, with special protection for openings, mounting positions, and edge structures. This helps prevent chipped openings, structural cracking, and assembly-area damage caused by stacking, impact, or concentrated local pressure during transportation. Products are packed by position count and specification, and bulk orders can be arranged in layered carton packing.
Quality Control
Production is carried out according to drawings and the required outer diameter, inner diameter, length, and wall thickness. Under the ISO9001 quality management system, raw material batches, first-article approval, in-process sampling inspection, finished product inspection, and pre-shipment reinspection are all controlled. Inspections cover outer diameter, inner diameter, length, wall thickness, straightness, as well as cracks, chipped edges, and surface defects.
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