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Rulon Bearings

Morgan Advanced Ceramics Luminex ™ 990 Mac-M994S Magnesium oxide ceramic
Categories: Ceramic; Oxide; Magnesium Oxide

Material Notes: A high-purity porous magnesia ceramic of typical composition 99.4% MgO with 0.6% CaO, 0.05% Al2O3 and 0.05% SiO2. Maximum levels of other components are 0.05% Fe2O3 and 0.001% B+Cd. Values quoted are based on test pieces and may vary according to component design. These values are not guaranteed in anyway whatsoever and should only be treated as indicative and for guidance only.

Prime Features:

  • Maintains high electrical resistance at temperatures up to 1100C.
  • Particle size distribution, porosity and crushability can be tailored to customer requirements
  • Becomes excellent thermal conductor at elevated temperatures
  • Very low boron and cadmium levels for low neutron capture on nuclear applications
  • Made from 100 per cent electrofused magnesium oxide
Typical Applications:
  • Industrial and domestic electrical equipment
  • Crushable bushes for electrical insulation at high temperature
  • Sheath and high wattage cartridge heaters
  • High temperature cabling. Insulating materials for thermocouples
Production Capabilities:
  • Wide variety of single and multihole forms
  • Extrusions to tight tolerances

Information provided by Morgan Advanced Materials

Key Words: Luminex ™ 990
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 2.20 - 2.70 g/cc0.0795 - 0.0975 lb/in³fired, tailorable
Open Porosity 24 - 38 %24 - 38 %tailorable
 
Mechanical PropertiesMetricEnglishComments
Flexural Strength 7.00 - 85.0 MPa
@Temperature 20.0 °C
1020 - 12300 psi
@Temperature 68.0 °F
3-point
Compressive Strength 12.0 - 190 MPa1740 - 27600 psitailorable
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity  7.70e+6 ohm-cm
@Temperature 1000 °C
7.70e+6 ohm-cm
@Temperature 1830 °F
 3.60e+7 ohm-cm
@Temperature 900 °C
3.60e+7 ohm-cm
@Temperature 1650 °F
 2.20e+8 ohm-cm
@Temperature 800 °C
2.20e+8 ohm-cm
@Temperature 1470 °F
 2.00e+9 ohm-cm
@Temperature 700 °C
2.00e+9 ohm-cm
@Temperature 1290 °F
 3.20e+10 ohm-cm
@Temperature 600 °C
3.20e+10 ohm-cm
@Temperature 1110 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear  14.8 µm/m-°C
@Temperature 20.0 - 1000 °C
8.22 µin/in-°F
@Temperature 68.0 - 1830 °F
 41.2 µm/m-°C
@Temperature 200 - 500 °C
22.9 µin/in-°F
@Temperature 392 - 932 °F
Thermal Conductivity 8.00 - 32.0 W/m-K
@Temperature 20.0 - 900 °C
55.5 - 222 BTU-in/hr-ft²-°F
@Temperature 68.0 - 1650 °F
Maximum Service Temperature, Air 1200 °C2190 °F
 
Component Elements PropertiesMetricEnglishComments
Al2O3 0.050 %0.050 %
CaO 0.60 %0.60 %
Fe2O3 <= 0.050 %<= 0.050 %
MgO 99.4 %99.4 %
Other >= 0.0010 %>= 0.0010 %B+Cd
SiO2 0.050 %0.050 %
 
Descriptive Properties
Colorwhite

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 view all the property values for this datasheet as they were originally entered into MatWeb.

CMORF5069 / 200307

Aluminum Castings

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