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Alumina

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Aluminas (aluminum oxide, Al2O3) are the most commonly used technical ceramics due to their generally useful properties and good price/performance ratio. Alumina ceramics are commonly subdivided according to their alumina content ranging from 80% to more than 99.9%. Higher purity alumina demonstrates enhanced wear and corrosion resistance — creating a continuous scale of various alumina grades, compositions, and performance.

Aluminas are used in both general use and specialized applications. A grade is selected to fit the application environment. Alumina compositions and microstructures can be formulated to meet the specific performance requirements of more demanding applications.

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CAPA95 CAPA97 CAPA99 CAPA995 CAPA997 CAPA998
UNITS 95%Al2O3 97%Al2O3 99%Al2O3 99.5%Al2O3 99.7%Al2O3 99.8%Al2O3
Density G/CM3 3.7 3.8 3.88 3.9 3.9 3.9
Water Absorption 0 0 0 0 0 0
Color WHITE WHITE IVORY IVORY IVORY IVORY
Main Characteristics
  • General use
  • Wear resistance
  • Electrical insulator
  • Dielectric strength
  • Low dielectric loss
Mechanical Characteristics Vicker Hardness (Load 500g) GPa 13.0 14.0 15.5 16.0 17.2 17.2
Flexural Strength
MPa 320 350 350 370 380 380
Compressive Strength MPa 1960 2200 2250 2300 2350 2350
Young's Modulus of Elasticity GPa 310 320 350 360 360 360
Possion Ratio - 0.23 0.23 0.23 0.23 0.23 0.23
Fracture Toughness     Mpa・m1/2 3 - 4 3 - 4 3 - 4 4 - 5 4 - 5 4 - 5
Thermal Characteristics Coefficient of Linear Thermal Expansion 20-800℃ 1x10-6/℃ 7.2 7.2 7.3 7.3 7.3 7.2
Thermal Conductivity 20℃ W/(m.K) 22 24 27 28 30 30
Using Tempreture(Max)
℃ 1600 1600 1650 1700 1700 1700
Specific Heat J/(g.K) 0.78 0.78 0.79 0.78 0.79 0.78
Heat Shock Resistance(Put in water) ℃ 200 200 200 200 200 200
Electrical Characteristics Dielectric Strength kV/mm 15 15 15 15 15 15
Volume Resistivity 20℃ Ω.cm >1014 >1014 >1014 >1014 >1014 >1014
300℃ 1012 1012 1012 1012 1012 1012
*The values are typical material properties and may vary according to products configuration and manufacturing process.

CAPA-Y-ZrO
UNITS YTTRIA-STABLIZED ZIRCONIA
Density G/CM3 6
Water Absorption 0
Color White
Main Characteristics
  • Toughness
  • Mechanical Strength
  • High Heat Resistance
  • Corrosion Resistance
Mechanical Characteristics Vicker Hardness (Load 500g) GPa 12.7
Flexural Strength MOR(20℃) MPa 1000
Compressive Strength MPa 5000
Young's Modulus of Elasticity GPa 220
Possion Ratio - 0.31
Fracture Toughness Mpa・m1/2 4 - 5
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6 /℃ 11.0
Thermal Conductivity 20℃ W/(m.K) 3
Specific Heat J/(g.K) 0.46
Heat Shock Resistance(Put in water) ℃ -
Electrical Characteristics Dielectric Strength kV/mm 11.0
Volume Resistivity 20℃ Ω.cm 1013
300℃ 106
*The values are typical material properties and may vary according to products configuration and manufacturing process.
CAPA-Mg-ZrO
UNITS MAGNESIUM-STABLIZED ZIRCONIA
Density G/CM3 5.8
Water Absorption 0
Color Beige
Main Characteristics

Mechanical Characteristics Vicker Hardness (Load 500g) GPa 12.0
Flexural Strength MOR(20℃) MPa 545
Compressive Strength MPa 2400
Young's Modulus of Elasticity GPa
Possion Ratio -
Fracture Toughness Mpa・m1/2 6.0
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6/℃ 10.2
Thermal Conductivity 20℃ W/(m.K) 2.2
Specific Heat J/(g.K)
Heat Shock Resistance(Put in water) ℃ -
Electrical Characteristics Dielectric Strength kV/mm
Volume Resistivity 20℃ Ω.cm 1014
300℃
*The values are typical material properties and may vary according to products configuration and manufacturing process.
CAPA-SSiC
UNITS SILICON CARBIDE SSIC
Density G/CM3 3.2
Water Absorption 0
Color Black
Main Characteristics
  • Hardness
  • Wear Resistant
  • Mechanical strength
  • Light Weight
Mechanical Characteristics Vicker Hardness (Load 500g) GPa 23
Flexural Strength MOR(20℃) MPa 540
Compressive Strength MPa -
Young's Modulus of Elasticity GPa 440
Possion Ratio - 0.17
Fracture Toughness Mpa・m1/2 4 - 5
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6 /℃ 3.7 - 4.4
Thermal Conductivity 20℃ W/(m.K) 60
Specific Heat J/(g.K) 0.67
Heat Shock Resistance(Put in water) ℃ -
Electrical Characteristics Dielectric Strength kV/mm -
Volume Resistivity 20℃ Ω.cm 105
300℃ 104
*The values are typical material properties and may vary according to products configuration and manufacturing process.
CAPA-RBSiC
UNITS REACTION BONDED SILICON CARBIDE
Density G/CM3 3.2
Water Absorption 0
Color Black
Main Characteristics
  • Hardness
  • Wear Resistant
  • Mechanical strength
  • Light Weight
Mechanical Characteristics Vicker Hardness (Load 500g) GPa 22
Flexural Strength MOR(20℃) MPa 450
Compressive Strength MPa -
Young's Modulus of Elasticity GPa 430
Possion Ratio - 0.16
Fracture Toughness Mpa・m1/2 4 - 5
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6 /℃ 3.7 - 4.4
Thermal Conductivity 20℃ W/(m.K) 60
Specific Heat J/(g.K) 0.67
Heat Shock Resistance(Put in water) ℃ -
Electrical Characteristics Dielectric Strength kV/mm -
Volume Resistivity 20℃ Ω.cm
300℃
*The values are typical material properties and may vary according to products configuration and manufacturing process.
CAPA-SIN
UNITS SILICON NITRIDE
Density G/CM3 3.2
Water Absorption 0
Color Black
Main Characteristics
  • High toughness
  • Thermal shock resistant
  • Tight tolerances
Mechanical Characteristics Vicker Hardness (Load 500g) GPa 13.9
Flexural Strength MOR(20℃) MPa 580
Compressive Strength MPa -
Young's Modulus of Elasticity GPa 290
Possion Ratio - 0.28
Fracture Toughness Mpa・m1/2 4 - 5
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6 /℃ 2.4 - 3.2
Thermal Conductivity 20℃ W/(m.K) 25
Specific Heat J/(g.K) 0.64
Heat Shock Resistance(Put in water) ℃ -
Electrical Characteristics Dielectric Strength kV/mm 12
Volume Resistivity 20℃ Ω.cm >1014
300℃ 1012
*The values are typical material properties and may vary according to products configuration and manufacturing process.
CAPA-AlN
UNITS SILICON NITRIDE
Density G/CM3 3.2
Water Absorption 0
Color Gray
Main Characteristics
  • Thermally stable
  • Electrical resistivity
Mechanical Characteristics Vicker Hardness (Load 500g) GPa 10.4
Flexural Strength MOR(20℃) MPa 350
Compressive Strength MPa -
Young's Modulus of Elasticity GPa 310
Possion Ratio - 0.24
Fracture Toughness Mpa・m1/2 -
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6 /℃ 4.6
Thermal Conductivity 20℃ W/(m.K) 140
Specific Heat J/(g.K) 0.738
Heat Shock Resistance(Put in water) ℃ -
Electrical Characteristics Dielectric Strength kV/mm 25
Volume Resistivity 20℃ Ω.cm 1012
300℃
*The values are typical material properties and may vary according to products configuration and manufacturing process.
CAPA-STE
UNITS STEATITE
Density G/CM3 2.8
Water Absorption 0
Color White
Main Characteristics
  • Excellent dielectric strength
  • Good dielectric loss
Mechanical Characteristics Vicker Hardness (Load 500g) GPa 5.8
Flexural Strength MOR(20℃) MPa 140 - 160
Compressive Strength MPa -
Young's Modulus of Elasticity GPa 120
Possion Ratio - 0.22
Fracture Toughness Mpa・m1/2 -
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6 /℃ 7.7 - 10.0
Thermal Conductivity 20℃ W/(m.K) 2.0 - 3.0
Specific Heat J/(g.K)
Heat Shock Resistance(Put in water) ℃ 250
Electrical Characteristics Dielectric Strength kV/mm
Volume Resistivity 20℃ Ω.cm
300℃
*The values are typical material properties and may vary according to products configuration and manufacturing process.
CAPA-CODI
UNITS CORDIERITE
Density G/CM3 2.3
Water Absorption 0
Color Gray
Main Characteristics
  • Excellent thermal shock resistance
  • Heat resistance
  • Low thermal expansion
Mechanical Characteristics Vicker Hardness (Load 500g) GPa -
Flexural Strength MOR(20℃) MPa 30
Compressive Strength MPa -
Young's Modulus of Elasticity GPa 140
Possion Ratio - 0.31
Fracture Toughness Mpa・m1/2 -
Thermal Characteristics Coefficient of Linear Thermal Expansion 40-800℃ 1x10-6 /℃ <0.2(22-23℃）
Thermal Conductivity 20℃ W/(m.K) 2.0 - 3.0
Specific Heat J/(g.K) 0.71
Heat Shock Resistance(Put in water) ℃ 1000
Electrical Characteristics Dielectric Strength kV/mm 19.1
Volume Resistivity 20℃ Ω.cm >1014
300℃ 1012
*The values are typical material properties and may vary according to products configuration and manufacturing process.

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