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 | |||||
|---|---|---|---|---|---|
| Material | Magnesia | ||||
S-464 (MgO Type 2) | S-461 (MgO Type 1P) | ||||
| Chemical Analysis | |||||
| MgO, % | 97.0 min | 99.40 min | |||
| AL2O3, % | 1.00 max | 0.15 max | |||
| SiO2, % | 3.00 max | 0.13 max | |||
| CaO, % | 1.50 max | 0.35 max | |||
| Fe2O3, % | 0.15 max | 0.04 max | |||
| B+Cd, % | 0.0050 max | 0.004 max | |||
| Mechanical Properties | |||||
| Porosity, % | MIN 12 | MIN 14 | |||
| Bulk Density, gm/cc | 2.33 | 2.38 | |||
| Flexural Strength, psi | 2,000-10,000 | 2,000-10,000 | |||
| Compressive Strength, psi | 5,000-15,000 | 2,000-15,000 | |||
| Thermal Properties | |||||
| Thermal Expansion 25°-700° inch/inch/°Cx10-6 | 12.4 | 12.7 | |||
| Note: This information is for design guidance only. Du-Co will not guarantee this information as absolute values. Various geometries can affect properties | |||||