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Technical Ceramics

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Alumina Ceramic Parts

Alumina parts are made of aluminum oxide, which is one of the most important and versatile materials in the field of oxide ceramics. This material therefore is used in a wide applications. The alumina ceramic from UNIPRETEC has a Al2O3 up to 99.8%. Due to the fine structure of the material and its high surface quality, an unsurpassable combination of properties can be achieved.
  • Material

    : Aluminum Oxide
  • Color

    : White & Ivory
  • Density

    : 3.65-3.90 g/cm3
  • Thermal Conductivity

    : 20-30 W/m.K
  • Max. Service Temperature

    : > 1,500 degree C
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Product Detail

▼ Description of Alumina Ceramics

Alumina, or Aluminum Oxide, is a durable fine industrial ceramic that is commonly used in various applications. The purity of Al2O3 in finished alumina products usually ranges between 90 and 99.8%, UNIPRETEC mainly work with alumina materials with Al2O3 purity of 95 to 99 percent. Parts and components made of alumina ceramics have many favorable features as below.


  Good Thermal Conductivity
  High Corrosion Resistance
  Excellent Electrical Insulation
  High Hardness, Wear Resistant
  Maximum Using Temp. 1,800 °C
  Low Cost Fine Ceramic Material


With about 10 years of manufacturing alumina ceramic components, UNIPRETEC offers a variety of alumina ceramic forming methods, including molded injection, die pressing, slip casting, extrusion, and cold isostatistically pressing. We are also good at precision machining, since the hardness of sintered alumina ceramic parts is about 9 Mohs, only diamond tool is suitable for machining work. 




▼ Material Properties of Aluminum Oxide Ceramics

 ITEM
 UNIT
 ALUMINA | A950
 ALUMINA | A990
 Main Content
 -  95% Al2O3
 99% Al2O3
 Color
 -  White
 White & Ivory
 Density
 g/cm3
 > 3.65  > 3.85
 Vickers Hardness
 Gpa
 14  17
 Flexural Strength
 Mpa
 310  360
 Compressive Strength
 Mpa
 2,200  2,500
 Electrical Resistivity
 Ω·cm
 >1014
 >1014
 Dielectric Strength
 KV/mm
 15  17
 Dielectric Constant
 1 MHz
 8  9
 Thermal Conductivity
 W/m.K          
 25  29
 Max. Working Temperature
 °C / °F
 1,500 / 2,730
 1,650 / 3,000
 Resistance to Thermal Shock
 △T(°C)
 210
 230
 Thermal Expansion Coefficient (25 - 1,000 °C)
 10-6/K
 7 - 9
 7 - 9

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


▼ Popular Alumina Ceramic Products

Trays and Setters for MIM Sintering

Armor Plates and Tiles

Wear Resistant Liners

Pump Plunger

Tubes and Rods for Thermocouple

Piston for Pressure Washer

Customized Precision Parts

Roller for Three Roll Mill

Ceramic Insulating Substrates

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