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Elmet Technologies

Morgan Advanced Ceramics AL 1009™ Mac-A100W-Porous Aluminum Oxide Ceramic
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: A porous alumina ceramic of 99.9% Al2O3 content, especially developed as a ‘lossy’ material for microwave attenuation as typically needed in vacuum tubes.

Prime Features:

  • Highly cost effective, efficient and long life alternative to other materials
  • Excellent high temperature characteristics
  • Good thermal conductivity
  • High electrical resistivity
  • Withstands aggressive chemical environments
  • No organic content
Typical Applications:
  • Vacuum tubes
  • Duties where a porous material is needed to attenuate RF power at microwave frequencies
Production Capabilities:
  • Isostatic and dry pressing of small to large complex components
  • CNC grinding and lapping to very tight tolerances
  • Prototype, batch and volume production
  • Complete documentation and traceability

Information provided by Morgan Advanced Materials

Key Words: Mac-A100W-Porous
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Physical PropertiesMetricEnglishComments
Bulk Density 3.10 g/cc0.112 lb/in³
Open Porosity 18 - 20 %18 - 20 %nominal, apparent
 
Mechanical PropertiesMetricEnglishComments
Flexural Strength 158 MPa22900 psi
 
Electrical PropertiesMetricEnglishComments
Dielectric Constant 6.9
@Frequency 1e+6 Hz,
Temperature 25.0 °C
6.9
@Frequency 1e+6 Hz,
Temperature 77.0 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear 7.50 µm/m-°C
@Temperature 20.0 - 300 °C
4.17 µin/in-°F
@Temperature 68.0 - 572 °F
Maximum Service Temperature, Air 1800 °C3270 °Fno load
 
Component Elements PropertiesMetricEnglishComments
Al2O3 99.9 %99.9 %
 
Descriptive Properties
Coloroff white

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