Magnesium Oxide Ceramic – MgO

Ceramic Tubes

Our electrically Fused Magnesium Oxide Ceramic – MgO extruded ceramic cores and dry pressed ceramic bushings and ceramic spacers have good electrical insulating properties with the added benefit, offering good thermal conducting properties at elevated temperatures. Typical applications for Magnesium Oxide Ceramic (MgO) include, but not limited to, cartridge heaters, thermocouples, mineral insulated cable, high watt density heaters as well as other temperature sensing devices.

Material Specifications Meeting the Requirements of ASTM: E1652-21
S-464 (MgO Type 2)
S-461 (MgO Type 1P)
Chemical Analysis     
MgO, %97.0 min99.40 min   
AL2O3, %1.00 max0.15 max   
SiO2, %3.00 max0.13 max   
CaO, %1.50 max0.35 max   
Fe2O3, %0.15 max0.04 max   
B+Cd, %0.0050 max0.004 max   
Mechanical Properties     
Porosity, %MIN 12MIN 14   
Bulk Density, gm/cc2.332.38   
Flexural Strength, psi2,000-10,0002,000-10,000   
Compressive Strength, psi5,000-15,0002,000-15,000   
Thermal Properties     
Thermal Expansion 25°-700°
Note: This information is for design guidance only. Du-Co will not guarantee this information as absolute values. Various geometries can affect properties