Alumina Ceramics have excellent electrical, wear resistant, and high temperature properties. Our Alumina products also exhibit excellent mechanical strength, and can operate at safe operating temperatures up to 1650 C. Typical applications include, but are not limited to, high temperature thermocouple insulators, Resistance Temperature Detector (RTD’s), Differential Thermal Analysis (DTA’s) components, electrical heating elements, fuses, igniters, resistors, stand offs, thermocouple cores, load banks, ovens, furnaces, connectors, knife sharpeners, substrates, heat sinks, sensors and spacers
Mechanical, Electrical, Thermal and Physical Properties
| Material Grade99.8% Alumina Oxide | |
| Physical Properties | |
| Water Absorption (%) | impervious:0.00 |
| Density (g/cc) | 3.9 |
| Color | White |
| Mechanical Properties | |
| Flexural Strength (1K PSI) | 55 |
| Compressive Strength (1K PSI) | 350 |
| Tensile Strength (1K PSI) | 25 |
| Hardness (Moh’s Scale) | 9 |
| Impact Resistance (Inch-Lbs.) | 7 |
| Electrical Properties | |
| Dielectric Strength (Volts/Mil) | 250 |
| Dielectric Constant (@1MHz) | 9 |
| Loss Index (@1MHz) | 0.001 |
| Thermal Properties | |
| C.O.T.E. (20-650 C) | 7.9 x 10-6 |
| Safe Operating Temperature (C) | 1650 |
| Thermal Conductivity (W/m-C) | 30 |
| Note: This information is for design guidance only. Du-Co will not guarantee this information as absolute values. Various geometries can affect properties | |