Du-Co Ceramics manufactures high-purity 99.8% alumina ceramic components for demanding applications requiring exceptional electrical insulation, high-temperature performance, wear resistance, and mechanical strength. With safe operating temperatures up to 1650°C, 99.8% alumina offers enhanced performance compared to lower-purity alumina materials and is commonly used in thermocouple assemblies, electrical heating systems, sensors, substrates, and other applications requiring superior reliability in extreme environments.
Applications for 99.8% Alumina Ceramic
Du-Co’s 99.8% alumina ceramic components are commonly used in:
- High-temperature thermocouple insulators
- Resistance Temperature Detectors (RTDs)
- Differential Thermal Analysis (DTA) components
- Electrical heating elements
- Igniters
- Resistors
- Thermocouple cores
- Load banks
- Furnaces and ovens
- Connectors
- Substrates
- Heat sinks
- Sensors
- 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 | |
Need a High-Purity Alumina Ceramic Solution?
Du-Co Ceramics manufactures precision 99.8% alumina ceramic components for demanding electrical, thermal, and industrial applications. Whether you need thermocouple insulators, substrates, electrical components, or custom-engineered ceramic parts, our team can help determine if high-purity alumina is the right material for your application. Contact us today to discuss your requirements or request a quote.