Project Description

Sample Products

  • Aluminium oxide Al2O3

Aluminium Oxide Al2O3

  • Ceramic Insulators

Ceramic Insulators

  • Metalized Alumina Ceramics

Metalized Alumina Ceramics

Advanced Finishing Services

  • Precision grinding and lapping
  • Laser machining
  • Engineering design and support
  • Metallizing
  • Alumina Ceramics-to-metal brazing
  • Specialized coatings
  • Threaded components
  • Precision motion components
  • Complex cleanroom assemblies

Manufacturing Options

  • Injection molding
  • Roll compacting
  • Co-firing
  • Isostatic pressing
  • Dry pressing
  • Hot pressing
  • Tape casting
  • Slip casting

Material Properties (Alumina 99.8%)

Density gm/cc 3.92
Crystal Size (Average) Microns 6
Water absorption (open porosity) % 0
Gas permeability % 0
Color ¯ Ivory

Flexural Strength (MOR) 20°C MPa (psi x 103) 375 (54)
Elastic Modulus 20°C GPa (psi x 106)  370 (54)
Poisson’s Ratio 20°C ¯  0.22
Compressive Strength 20°C MPa (psi x 103)  2500 (363)
Hardness GPa (kg/mm2)  14.1  (1440)
R45N  83
Tensile Strength 25°C MPa (psi x 103)  248 (36)
Fracture Toughness K(I c) mpa m1/2  4-5

Thermal Conductivity 20°C W/m K 30.0
Coefficient of Thermal Expansion 25-1000°C X 10-6/°C 8.2
Specific Heat 100°C 880 J/kg*K 880
Thermal Shock Resistance   ΔTc  °C 200
 Maximum Use Temperature   °C  1750

Dielectric Strength 6.35mm ac-kV/mm (ac V/mil) 8.7 (220)
Dielectric Constant 1 MHz 25°C  9.8
Dielectric Loss (tan delta) 1 MHz 25°C  <0.0001
Volume Resistivity 25°C ohm-cm  >10
                            500°C ohm-cm
                            1000°C ohm-cm

*The chart is intended to illustrate typical properties. Property values vary with method of manufacture, size, and shape of part. Data contained herein is not to be construed as absolute and does not constitute a representation or warranty for which Ortech, Inc. assumes legal responsibility.

Material Properties (Alumina 99.5%)

Density gm/cc 3.90
Crystal Size (Average) Microns 6
Water absorption (open porosity) % 0
Gas permeability % 0
Color ¯ Ivory

Flexural Strength (MOR) 20°C MPa (psi x 103) 379 (55)
Elastic Modulus 20°C GPa (psi x 106)  370 (54)
Poisson’s Ratio 20°C ¯  0.22
Compressive Strength 20°C MPa (psi x 103)  2600 (377)
Hardness GPa (kg/mm2)  14.1 (1440)
R45N  83
Tensile Strength 25°C MPa (psi x 103)  262 (38)
Fracture Toughness K(I c) mpa m1/2  4-5

Thermal Conductivity 20°C W/m K 30.0
Coefficient of Thermal Expansion 25-1000°C X 10-6/°C 8.2
Specific Heat 100°C 880 J/kg*K 880
Thermal Shock Resistance   ΔTc  °C 200
 Maximum Use Temperature   °C  1750

Dielectric Strength 6.35mm ac-kV/mm (ac V/mil) 8.7 (220)
Dielectric Constant 1 MHz 25°C  9.7
Dielectric Loss (tan delta) 1 MHz 25°C  0.0001
Volume Resistivity 25°C ohm-cm
                            500°C ohm-cm
                            1000°C ohm-cm

*The chart is intended to illustrate typical properties. Property values vary with method of manufacture, size, and shape of part. Data contained herein is not to be construed as absolute and does not constitute a representation or warranty for which Ortech, Inc. assumes legal responsibility.

Material Properties (Alumina 96%)

Density gm/cc 3.72
Crystal Size (Average) Microns 6
Water absorption (open porosity) % 0
Gas permeability % 0
Color ¯ White

Flexural Strength (MOR) 20°C MPa (psi x 103) 358 (52)
Elastic Modulus 20°C GPa (psi x 106)  303 (44)
Poisson’s Ratio 20°C ¯  0.21
Compressive Strength 20°C MPa (psi x 103)  2068 (300)
Hardness GPa (kg/mm2)  11.5 (1175)
R45N  78
Tensile Strength 25°C MPa (psi x 103)  221 (32)
Fracture Toughness K(I c) mpa m1/2  4-5

Thermal Conductivity 20°C W/m K 24.7
Coefficient of Thermal Expansion 25-1000°C X 10-6/°C 8.2
Specific Heat 100°C 880 J/kg*K 880
Thermal Shock Resistance   ΔTc  °C 250
 Maximum Use Temperature   °C  1700

Dielectric Strength 6.35mm ac-kV/mm (ac V/mil)  8.3 (210)
Dielectric Constant 1 MHz 25°C  9
Dielectric Loss (tan delta) 1 MHz 25°C  0.0002
Volume Resistivity 25°C ohm-cm
                            500°C ohm-cm
                            1000°C ohm-cm

*The chart is intended to illustrate typical properties. Property values vary with method of manufacture, size, and shape of part. Data contained herein is not to be construed as absolute and does not constitute a representation or warranty for which Ortech, Inc. assumes legal responsibility.
  • ceramic bearings vs steel bearings

ceramic bearings vs steel bearings

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Ceramic bearings vs steel bearings enough has written about this subject so here is gust the fact
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  • Aluminium oxide Al2O3

Aluminium Oxide Al2O3

12:38 pm|0 Comments

Here at Ortech Advance Ceramics we have been manufacturing Aluminium oxide Al2O3 for over 20 years. Every single month we make 100’s of different prototypes serving a variate of different engineered parts for top national

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Silicon Nitride Welding Location Pins

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Applications within the Projection Welding
industry demand the toughest and most
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Ortech, Incorporated is a worldwide leader in the
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Silicon Nitride has an unparalleled track
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  • Ceramic Insulators

Ceramic Insulators

11:24 am|0 Comments

Due to our machining and manufacturing capabilities, Ortech is able to offer a wide variety standard and Custom Products of advanced ceramic insulators. Ortech provide a broad variety of unique engineering properties to improve or