alumina ceramic tube

Specifications:
Alumina Ceramic Tube, Thermocouple Tube, Ceramic Insulator .
Out Dia.: 3mm to 100mm, Length: 10mm to 1300mm.
Material: 95% to 99.5% Alumina, Single or Multi-bore ceramic tube
Features:
High wear resistance, corrosion resistance, high intensity, high precision, good smoothness, polishing surface , good air-proof, etc.
Remarks:
Production is customizable, for more information, please do not hesitate to tell me.
Sizes, Tolerance, Surface Roughness, Concentricity, Perpendicularity and other specifications could be according with your requirements.

The alumina tubes are widely used in thermocouple protections and some are used in furnaces. We could produce both open for two ends, and one open, the other closed.

Property
Items Unit 95% Al2O3 99.5% Al2O3
Density g/ cm3 3.7 3.9
Flexural Strength MPa 313 340
Compressive Strength MPa 3400 3600
Modulus of Elasticity GPa 350 380
Impact Resistance MPa• m1/ 2 4 5.1
Weibull Modulus m 10 10
Vickers Hardness HV0.5 1800 1900
Thermal Conductivity W/ mk 24 27
Highest Application Temperature ° C 1600 1750
Volume Resistivity at 20° C © .cm20 > 1014 > 1014
Dielertric strength KV/ mm 20 25
Thermal expansion X10-6/ K 5.0-8.3 5.4-8.3