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Custom Al2O3 Aluminum Oxide Alumina Ceramic Tube

Custom Al2O3 Aluminum Oxide Alumina Ceramic Tube

Alumina(Aluminum Oxide Ceramic) is the most commonly used technical ceramic material. Thanks to its very good electrical insulation, dielectric strength and high temperature resistance up to 1,700 °C, Alumina Ceramic is ideal for electrical applications and high-temperature applications.

  • Density : 3.65 - 3.90 g/cm3
  • Max. Service Temp. : 1,400 - 1,800 degree C
  • Thermal Conductivity : 20 - 30 W/m.K
  • Dielectric Strength : 15 - 20 KV/mm

Material Description of Alumina Tubes

Alumina ceramic tube is made of Aluminum Oxide(Al2O3), which is a white or ivory white ceramic that has been applied to electrical components from an early stage by taking advantage of its good electrical insulation properties, besides, ceramic tubes made of high alumina have also high resistance to temperature, heat, wear and corrosion, and alumina ceramic is the cheapest material among the fine technical ceramics. UNIPRETEC offers high alumina tube with a purity range from 90% to 99.8%. It is also possible to manufacture large nonporous alumina ceramic tubing, and the high purity type has high mechanical strength and excellent corrosion resistance.

√High Hardness√Low Coefficient of Thermal Expansion √Excellent Electrical Insulator√Mechanically Stable at High Temperature √Good Thermal Shock Resistance√High density, non-porous and vacuum tight √Resists Abrasive Wear and Chemical Attack√......

Material Properties of Alumina Tube

ITEMUNITALUMINA | A950ALUMINA | A990
Main Content-95% Al 2 O 399% Al 2 O 3
Color-WhiteWhite & Ivory
Densityg/cm 3> 3.65> 3.85
Vickers HardnessGpa1417
Flexural StrengthMpa310360
Compressive StrengthMpa2,2002,500
Electrical ResistivityΩ·cm>10 14>10 14
Dielectric StrengthKV/mm1517
Dielectric Constant1 MHz89
Thermal ConductivityW/m.K2529
Max. Working Temperature°C / °F1,500 / 2,7301,650 / 3,000
Resistance to Thermal Shock△T(°C)210230
Thermal Expansion Coefficient (25 - 1,000 °C)10-6/K7 - 97 - 9

∆ The data is offered for reference only, exact data will vary depending on producing method & part configuration.

Typical Applications of Aluminum Oxide Tubes

  • Noble metal thermocouple protection, furnace tubes, high temperature vacuum furnaces, heat treating furnace rollers, radiant tubes, laser tubes, corona treater tubes and ozone generators.
  • Corrosive environments and electrical insulation applications. Noble metal thermocouples and diffusion furnace profile couples, laser wave guides and RTD's.
  • Solutions for the pharmaceutical, food and cosmetic industries with a focus on filling, dosing and control applications.
Heating Tube for Tube Furnace
Tube for Corona Treatment
Electrical Insulator Tube
Wear Liner Tube for Pumps
Thermocouple Protection Tubes
Tube for Ozone Generator

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