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Morgan Advanced Ceramics Deranox™ 975 Mac-A975R Aluminum Oxide Ceramic
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Fine grain alumina ceramic of 97.5% Al2O3 content. A high quality material, widely used for electrical and mechanical components that require thick film metallizing, as well as for dynamic duties where resistance to abrasion and chemical attack are essential.

Prime Features:

  • Can be thick film metallized with noble metal
  • High volume resistivity
  • High mechanical strength
  • Excellent corrosion resistance
  • Excellent wear resistance
  • Low coefficient of friction
  • High thermal stability
  • High density, non-porous and vacuum tight
Typical Applications:
  • Thick film metallized components, such as those with conductor and/or resistor networks, dielectric layers, solderable interfaces
  • High-integrity devices for duties in the defence, aerospace, medical, laser and scientific instrument fields. Dynamic and static components in pumps and valves that handle corrosive or abrasive media.
Production Capabilities:
  • Complex pressed and machined components
  • Ground or polished surface finishes
  • Spheres to high tolerance
  • Precision thick film metallizing
  • Prototype, batch and volume production
  • Soldered assemblies

Information provided by Morgan Advanced Materials

Key Words: Mac-A975R
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Physical PropertiesOriginal ValueComments
Density 3.80 g/ccfired
Open Porosity 0.00 %fully dense, % nominal, apparent
Grain Size 4.0 µm
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell HR45N 85
Hardness, Vickers 15
@Load 0.500 kg
[GPa]
Modulus of Elasticity 340 GPa
@Temperature 20.0 °C
Young's
Flexural Strength 350 MPa3-point; ASTM C1161
Compressive Strength 2500 MPa
Fracture Toughness 3.60 MPa-m½
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+8 ohm-cm
@Temperature 600 °C
 >= 1.00e+12 ohm-cm
@Temperature 300 °C
 >= 1.00e+16 ohm-cm
@Temperature 20.0 °C
Dielectric Constant 9.5
@Frequency 9.40e+9 Hz
 9.6
@Frequency 1e+6 Hz
Dielectric Strength 20.0 kV/mm
@Thickness 2.00 - 3.00 mm
Dissipation Factor 0.00019
@Frequency 1e+6 Hz
 0.00043
@Frequency 9.40e+9 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 8.10 µm/m-°C
@Temperature 0.000 - 800 °C
Specific Heat Capacity 0.880 J/g-°C
Thermal Conductivity 24.0 W/m-K
@Temperature 20.0 °C
Maximum Service Temperature, Air 1600 °Cno load
 
Component Elements PropertiesOriginal ValueComments
Al2O3 <= 97.5 %
 
Descriptive Properties
Colorwhite
Thermal Downshock190 sC

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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