Alumina Tubes

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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).

ONLINE SHOP

Stock sizes of our Alumina Tubes can be ordered through our online shop. These stock Alumina Tubes are available in lengths up to 1000mm, and can be cut to size as required within 48 hours. Tubes available include single bore, multi more and closed end tubes. Bespoke sizes can be ordered by emailing enq@ipsceramics.com or usa@ipsceramics.com.

VISIT OUR ONLINE SHOP HERE

Alumina Tube Stock Sizes Include:
Metric	Imperial
3mm OD/ 2mm ID	0.12” OD/ 0.08” ID
5mm OD/ 3mm ID	0.20” OD/ 0.12” ID
10mm OD/ 6mm ID	0.40” OD/ 0.24” ID
15mm OD/ 11mm ID	0.60” OD/ 0.43” ID
20mm OD/ 15mm ID	0.80” OD/ 0.60” ID
30mm OD/ 22mm ID	1.20” OD/ 0.87” ID
35mm OD/ 27mm ID	1.38” OD/ 1.06” ID
40mm OD/ 32mm ID	1.57” OD/ 1.26” ID

TECHNICAL INFORMATION

Alumina Tubes
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 %