Alumina Tubes and Rods

IPS Ceramics provide strong, non-reactive alumina tubes and rods for use in a range of demanding applications.

The unique and versatile properties of Alumina make them a cost-effective yet high-performance solution suitable for many industries.

Fully dense material
Excellent mechanical strength
High stiffness
Thermally and chemically stable

General Overview

Alumina tubes and rods are found across numerous user industries as a cost-effective yet high-performance solution. The combination of key properties makes them a go-to product in many instances:

Thermally stable – Alumina can be used in both oxidizing and reducing atmospheres up to 1600°C (2910°F) and in vacuum furnaces up to 1750°C (3180°F).
Fully dense – Alumina provides a non-permeable tube that protects from contamination and can be used to create a gas-tight assembly.
High chemical resistance – Alumina is chemically inert and not corroded by water or steam. It offers good resistance to corrosive substances such as strong acids or alkalis, even at elevated temperatures.
Electrical insulation – Alumina is also widely used as an electrically insulating material. It can be used for insulators operating at elevated temperatures (e.g. furnace lead-in tubes, fuel-cells).

Technical Information

General Information
Type	95% Alumina	99% Alumina
Max Usage Temp.	1450 °C / 2650 °F	1600 °C / 2900 °F
Bulk Density	3.7 g/cm³	3.8 g/cm³
Open Porosity	<0.5%	<0.25%
Modulus of Rupture @ Room Temp.	250 MPa	300 MPa
Modulus of Elasticity	350 GPa	400 GPa
Thermal Conductivity	25 W/mK	30 W/mK
Thermal Expansion at 20 – 1000 °C	8 x10^-6/K	8 x10^-6/K
KIC Fracture Toughness	2.5 MPam	3.0 MPam
Volume Resistance	<10¹⁴Ωcm	<10¹⁴Ωcm
Dielectric Constant	9	10
Dielectric Strength	20 kV/mm	30 kV/mm
Typical Chemical Analysis
Al₂O₃	95 %	99 %
CaO	1.8 %	0.2 %
SiO₂	2.5 %	0.3 %
MgO	0.5 %	0.2 %