Alumina Aluminium Oxide Ceramic Insulation Tubes for Structural Parts

Price: 6.0~8.0 USD
Trade Term: FOB
Payment Terms: T/T,WU
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Basic Info.
  • Brand Name: UNIPRETEC 
  • Material: Alumina 
  • Purity: 95% 
  • Color: White 
  • Density: 3.65g/cm3 
  • Young's Modulus: 280Gpa 
  • Flexural Strength: 280Mpa 
  • Compressive Strength: 2000Mpa 
  • Thermal Conductivity: 18-25W/(m•K) 
  • Thermal shock resistance: 220ΔT(C°) 
  • Max. Working Temperature: 1500℃ 
  • Model No.: UPT-ALC016 
  • Place of Origin: Fujian  
  • Min.Order: 100 Piece/Pieces
  • Means of Transport: Ocean, Air
Supply Capacity
  • Production Capacity: 95000pcs/year
  • Packing:wooden box /carton box
  • Delivery Date: 40days

Alumina is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness. 

During the prodcution, small amounts of silica (SiO2), magnesia (MgO) and zirconia (ZrO2) may be added to alumina ceramics. The applications vary with the purity of Alumina. 99% Alumina Ceramics are mostly used for high temperature crucibles, kiln furniture, special abrasion resistant parts, such as ceramic bearings, ceramic sealings or faucet discs; 95% Alumina Ceramics are usually applied for corrosion-resitant components or wear proof parts; 85% Alumina Ceramis can be metallized with metals like molybdenum, niobium, tantalum to use for electric vacuum devices. 

Properties of Alumina Ceramics 
Alumina has a high melting point, high hardness and high mechanical strength, although mechanical strength is reduced at temperatures above 1000° C. Due to the relatively large coefficient of thermal expansion, thermal shock resistance is reduced. Alumina is an electrically insulating material, with a high electrical resistivity, increasing with purity. Good chemical stability of alumina, leads to a high corrosion resistance. It is insoluble in water and only slightly soluble in strong acid and alkaline solution. 

Various Application of Alumina Ceramics 
1. Seal rings 
2. Medical prostheses 
3. Laser tubes 
4. Electronic substrates 
5. Ballistic armour 
6. Thermocouple tubes 
7. Electrical insulators 
8. Grinding media 
9. Threadguides 
10. Wear components 

CharacteristicsUnit95 Al2O399 Al2O3ZrO2GPSi3N4BNGlass Ceramic
Crystal Structure-hexagonalhexagonaltetragonalhexagonalhexagonal-
Water Absorption%00000.0-1.00
Young's ModulusGpa28035020529567065
Vickers HardnessGpa14201218-20--
Flexural Strength @R.T.Mpa28030090065051100
Compressive Strength @R.T.Mpa2000250022002200230500
Thermal Conductivity @R.T.W/(m*k)18-25302.225201.7
Thermal shock resistanceΔ(℃)220180-200280-350450-650>150025-100
Max. Working Temperature @R.T.150017008501200960800
Volume Resistivity @R.T.Ω*cm>10^15>10^14>10^12>10^1410^1310^16
Dielectric Constant (1 MHz @R.T. )-9.59.8268.24.086.02
Dielectric StrengthkV/mm1622-1637540

Alumina Aluminium Oxide Ceramic Insulation Tubes for Structural Parts

About UniPreTec 
UniPreTec provides high-performance ceramic products in Alumina, Zirconia, Boron Nitride, Machinable Glass Ceramic, Silicon Nitride and  further special materials. Along with these materials, we offer several machining from which to choose such as cutting, drilling, sawing, turning, grinding, polishing etc.. Furthermore, our technologies and equipments allow us to provide various and flexible forming processes, like dry pressing, isostatic pressing, extrusion, injection moulding and slip casting.

Send message to this supplier
Mr. Tony Huang (sale manager)
Tel: 86-592-5510319
Mobile: 13860446139
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Contact Method
Xiamen Unipretec Advanced Materials Co.,Ltd
RM606, NO.151 YUEHUA ROAD, HULI DISTRICT, Xiamen, Fujian, China (Mainland) / 361006
Fax: 86-592-5510320
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