High Temperature Ceramic Tube for Furnace / Alumina Furnace Tube
Tag Key words : high temperature ceramic tube
ceramic tube for furnace
alumina furnace tube
Product Name | High Temperature Ceramic Tube for Furnace / Alumina Furnace Tube |
Material | 95%, 99%, 99.5% and 99.7% Alumina |
Color | white or custom |
Standard | international standard |
Straightness | ≤3‰ |
Properties | Thermal resistance/ Wear resistance/ Stable Chemical Performance/ Corrosion resistance/ Electrical insulation, High compressive strength |
Mingrui high temperature ceramic furnace tube are 99.5% to 99.8% high purity and offer elevated temperature stability. Alumina tubes are available in custom sizes, including American and Metric, and offer a low material cost.
Minerals containing alumina make up nearly 15% of the earth’s crust. This makes it practically inexhaustible and versatile. Alumina provides the combination of low thermal expansion, superior thermal conductivity and high compressive strength making it thermal shock resistant and the ideal product for alumina tubes. Our alumina tube models have elevated dielectric properties and are gas tight providing a higher vacuum or protective atmosphere when at an extreme temperature.
These high temperature ceramic tube offer:
Typical Physical Properties of high temperature ceramic tube | ||
MATERIAL | ALUMINA | |
Composition | 99.80% AL2O3 | 99.5% AL2O3 |
Bulk Specific Gravity (g/cc) | 3.9 | 3.8 |
Color | Ivory | Ivory |
Impenetrability | Gas Tight | Gas Tight |
Dye Penetration A.S.T.M. | Tight | Tight |
Flexural Strength (psi) | 70,000 | 50,000 |
Compressive Strength (psi) | 370,000 | 350,000 |
Tensile Strength (psi) | 43,000 | 33,000 |
Maximum Working Temperature | 1800°C | 1750°C |
Likely Sag Temp. Unsupported Tube* | 1600 oC | 1600 oC |
Thermal Conductivity 24oC | 230 | 200 |
(BTU-in/ft2-hr-oF) 800oC | 60 | 50 |
Dielectric Strength 24oC V/Mil | 300 | 270 |
Thermal Expansion (per oC x 10-6) | 8 | 8.4 |
(24oC-1000 oC) | ||
Hardness (Moh’s scale) | 9 | 9 |
* Temperature at which an empty tube, 1 1/4″ diameter, suspended across an 18″ span, will sag 1/4″ in 1 hour. | ||
Where sag is not acceptable, tubes must be adequately supported along the full length. |
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