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Alumina /Al2O3


Feature

Alumina is the most versatile ceramics because of its high electric insulation,wear resistance and chemical stability.And it is also relatively low cost.
ASUZAC offers wide range of ceramics materials from standard Alumina of 99.6% purity up to 99.99% or black Alumina having less surface reflection.

AR(P)

purity alumina 99.9%
Fine ceramics sinter powder compacts , so the microstructure has the cavity that is called Pore usually. However, it succeeded in losing the Pore to the utmost limit by our high raw material making technology and sintering technology. Therefore, it came to achieve high smoothness and chemical resistance and high strength.

Applications
  • semiconductor tools
  • liquid crystal tools
SEM image:AR(P)SEM image:AR-99.6
SEM image:AR(P)
SEM image:AR-99.6

AR-99.6

purity alumina 99.6% up
a versatile material
comparatively low cost
Applications

  • semiconductor tools
  • LCD tolls
  • various structural materials
product image alumina

ARW

ARW is thin alumina ceramics produced by the doctor-blade process .
Purity alumina 99.5% up
Applications

  • alumina substrate
  • dummy wafer
thin alumina
Material Characteristics for Alumina Ceramics
  Alumina
AR-99.6 AR(P) ARW ARK AR-4N
Purity(Al2O3) % 99.6 99.96 99.6 96.0 99.99
Color tone - Ivory Dark Ivory White White White
Denstity g/cm3 3.94 3.98 3.90 3.75 3.94
Flexural rigidity MPa[3points] 370 425 400 370 330
Young's ratio GPa 390 410 370 340 360
Vickers hardness GPa 14.7 15.7 14.7 14.0 15.7
Poisson's ratio - 0.24 0.24 0.24 0.24 0.23
Fracture toughness MPa m1/2 4.0 4.0 3.0 3.0 4.0
Thermal expansion coefficient x10-6[Ambient~800oC] 7.7 7.8 7.7 7.7 7.7
Thermal conductivity W/(m*K) 32.0 34.0 28.0 23.0 31.0
Specific heat J/(kg*K) 0.78*103 0.78*103 0.78*103 0.78*103 0.78*103
Dielectric constant [1MHz] 10.2 9.8 9.7 9.5 9.5
Dielectric loss x10-4[1MHz] 70 5 5 5 5
Volume resistance Ω*cm >1015 >1015 >1015 >1015 >1015
Withstand voltage kV/mm 13.0 15.0 14.5 14.5 13.0
Reflectivity %
[Wave length
240thru2,600nm
Measuring Plane:
Approx.Ra0.8]
- - - - -
Feature and applications
  • High rigidity
  • High dielectric constant
  • Excellent wear resistance
 
*High purity
*Less contamination
*High density
*Free from microscope dust
*High purity
*Less contamination
NOTE:This chart is intended to illustrate typical properties found in the scientific and industrial literature. Property values can vary depending on method of manufacture and size/shape of component.

Material Characteristics of Alumina,Zirconia,Sic and more
pdf Material Characteristics (PDF47kb,7/30/2014)