Du-Co Ceramics manufactures steatite ceramic components for applications requiring excellent electrical insulation, good mechanical strength, and dependable performance at elevated temperatures. Steatite, also known as magnesium silicate ceramic, is one of the most widely used technical ceramic materials because it offers an outstanding balance of electrical properties, durability, and cost-effectiveness. With safe operating temperatures up to 1000°C, steatite ceramic is commonly used in electrical heating equipment, insulators, thermocouples, sensors, and numerous industrial applications.
Mechanical, Electrical, Thermal and Physical Properties
| Material Grade | L-3 | L-5 |
| Physical Properties | ||
| Water Absorption (%) | Impervious: 0.00 – 0.02 | Impervious: 0.00 – 0.02 |
| Density (g/cc) | 2.5 | 2.7 |
| Color | Off White (Cream) | Off White (Cream) |
| Mechanical Properties | ||
| Flexural Strength (1K PSI) | 18 | 20 |
| Compressive Strength (1K PSI) | 80 | 90 |
| Tensile Strength (1K PSI) | 8.5 | 9 |
| Hardness (Moh’s Scale) | 7.5 | 7.5 |
| Impact Resistance (Inch-Lbs.) | 5 | 5.3 |
| Electrical Properties | ||
| Dielectric Strength (Volts/Mil) | 230 | 240 |
| Dielectric Constant (@1MHz) | 5.5 | 6.2 |
| Volume Resistivity 25 C (ohms-cm) | >1E14 | >1E14 |
| Loss Index (@1MHz) | 0.028 | 0.007 |
| Thermal Properties | ||
| C.O.T.E. (20-650 C) | 8.0 x 10-6 | 8.4 x 10-6 |
| Safe Operating Temperature (C) | 1000 | 1000 |
| Thermal Conductivity (W/m-C) | 3.4 | 3.4 |
| Note: This information is for design guidance only. Du-Co will not guarantee this information as absolute values. Various geometries can affect properties | ||
Need a Cost-Effective High-Performance Ceramic Material?
Du-Co Ceramics manufactures custom and standard steatite ceramic components for demanding electrical, thermal, and industrial applications. Whether you require bushings, insulators, thermocouple components, or custom-engineered ceramic parts, our team can help determine if steatite is the right material for your application. Contact us today to discuss your requirements or request a quote.