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MAGOTEX Fused Magnesium Oxide
Magnesium oxide
Fused Magnesium Oxide
Fillers and Extenders
Suggested Application:
Filler for polymer systems, where high thermal conductivity with good electrical resistivity is required.
MAGOTEX Fused Magnesium Oxide has the following unique combination of properties:
1 - High thermal conductivity coefficient
2 - Low oil absorption
3 - Good electrical resistivity
4 - Low moisture
Typical Physical Properties:
Moisture: 0.1%
Oil Absorption (%Gardner-Coleman): 17.0
pH (20% Solids): 11.0
Refractive Index: 1.73
Hardness (Mohs' Scale): 5.5-6.0
Specific Gravity: 3.6
Bulking Value:
Lb./Solid Gallon: 30.10
Gallon/Lb.: 0.0332
Screen Residue (% Retained on 325 Mesh): 3.0
Resistivity (Ohm-cm 2): 12,000
Brightness (% MgO): 70.0
Thermal Properties:
Coefficient of Thermal Conductivity: 27 BTU/(HR)(FT 2)(FT)(F) at 140F
This compares to a value of 0.5-5.0 for many types of inorganic fillers, 118 for aluminum metal and 10 for aluminum oxide, at the same temperature.
Typical Chemical Analysis:
MgO: 95.0%
SiO2: 3.00
CaO: 1.8
Fe2O3: 0.2
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UNOCAL CHEMICALS DIVISION.
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