Magnesium Oxide

Magnesium oxide stands out as the leading crushable ceramic, uniquely balancing superior thermal conductivity with exceptional electrical insulation, even under extreme heat—making it ideal for high-performance thermal and electrical applications. 

Morgan Technical Ceramics engineers an advanced portfolio of high-purity magnesium oxide (MgO) materials, including both standard magnesia and our trademarked Luminex^® formulation. These materials are developed through precision-controlled synthesis processes to ensure tightly regulated chemical composition, delivering exceptional thermal and dielectric properties with high batch-to-batch reproducibility.

Luminex^® magnesium oxide, derived from seawater-precipitated magnesia, is engineered for applications demanding exceptional thermal and electrical performance. Its high purity conforms to current ASTM E1652 standards, which makes it ideal when high reliability is required, such as aerospace and nuclear applications.

This precise chemical composition translates directly to superior performance in cartridges heaters, tubular and coiled heaters, MI thermocouples, heat trace cables and medium voltage heaters. The material's stable electrical insulation and excellent thermal conductivity at elevated temperatures — where our Luminex^® range excels. 

Magnesium Oxide Luminex^® Characteristics

• High refractoriness - up to 1500°C
• Low electrical conductivity - MgO is an excellent electrical insulator
• High thermal conductivity - ideal for applications requiring efficient heat transfer 
• Particle size distribution tailored to customer specific requirements 
• Ceramic hardness can be tailored to meet customer specific requirements or can be agreed trough collaborative development 
  
  

Magnesium Oxide Luminex^® Applications

Luminex^® can be extruded to form uniform cross-sectional areas or can be injection moulded, where more complex shapes with external features are required. Typical applications include but are not limited to: 

• Crushable tubes for mineral insulated (MI) cable
• MgO winding cores for precise watt density control in cartridge heaters, ensuring optimized heat output and performance
• MI Thermocouple wire for both aerospace and automotive applications
• Medium-voltage heaters 
• Luminex^® and other magnesia materials have uses in a wide variety of applications
  
  

Why choose Morgan Technical Ceramics?

At Morgan Advanced Materials, we work together closely with customers, combining our materials expertise with proven manufacturing processes to deliver high-purity magnesium oxide solutions. With our unique expert application engineering, in-house tool manufacturing, and a dedicated team, we provide reliable, industry-leading components for demanding thermal and electrical applications, both now and in the future.