Alumina (Al2O3)

Alumina ceramic is the most widely used fine ceramic material. This material has superb characteristics such as high electrical insulation, high mechanical strength, high wear and chemical resistance.  Alumina ceramic has an excellent cost-to-part life performance record. Purity levels are available from 85% through 99.9%.

Honsin ceramics has efficient manufacturing facilities that support quick-turn prototype development and high volume production.


  • Wear-resistant products: ball-grinding ball, ball-milling column, pipe lining, pipe lining, welding lining, mosaic brick
  • Instrument accessories: crucibles, boat, robot arm, washer, positioning piece, thermocouple protection tube
  • Structural parts: precision rolls, coils, vacuum suction cups, positioning rods, bolts, various rods, tubes
  • Electronic insulation: insulation column, electronic substrate, insulated threading tube
  • Casting material: foam ceramic filter
  • Environment friendly materials: molecular sieve


  • Very good electrical insulation

Alumina ceramic is one of material choice and used as an electrical insulator for a number of electrical and electronic applications

  • High corrosion and wear resistance

Alumina ceramic has good corrosion and wear resistance, it is also used in chemical, medical and wear applications

Technical Characteristics – Alumina (Al2O3)

  A96% A99% A99.7%
Al2O3 96 99 99.7
Density (g/cm3) 3.70 3.85 3.91
Water Absorption (%) 0 0 0
Elastic Modulus (GPa) 350 370 380
Flexural strength Room (MPa) 310 340 395
Compressive strength (MPa) 2800 3000
Expansion coefficient (10-6/K) 6.7 7.2 7.2
Thermal conductivity Room(W/m•K) 22 32 34
Max. operating temperature (℃) 1550 1600 1600
Dielectric Constant (1MHz,25℃) 9.4 9.9 9.9
Volume Resistivity     (300℃) 1010 1013 1013