Technical ceramics
Ceramic supporting materials for electric elements and furnaces in a variety of forms. The Kanthal® program of technical ceramics include three different types of ceramics, all manufactured using raw materials of the highest quality and not containing conductive ingredients.
Information
Aluminosilicates (Kanthal® code A42P)
Materials for temperatures up to 1100-1200°C (2010-2190°F) with good thermal shock resistance. Alumina content of less than 50%.
Aluminous (Kanthal® codes A60P, A50C, A73E, A80E)
Materials for up to about 1300°C (2370°F) with fairly good thermal shock resistance and excellent dielectric properties. Alumina content of more than 50%.
Cordierites (Kanthal® code A38E)
Materials with added magnesium oxide for up to about 1100°C (2010°F) with excellent mechanical and thermal shock resistance.
Health and safety
Kanthal® ceramic materials do not contain substances dangerous to health or create them during use. They are produced using inert natural raw materials, and any organic binders used are burned during firing.
During final processing such as cutting or drilling, inert dust may be created. In these cases, workers must be provided with suitable protective equipment to prevent inhalation.
Characteristics
The Kanthal® program of technical ceramics include three different types of ceramics, all manufactured using raw materials of the highest quality and not containing conductive ingredients.
Kanthal® types of technical ceramics:
- Aluminosilicates (Kanthal code A42P)
- Aluminous (Kanthal codes A60P, A50C, A73E, A80E)
- Cordierites (Kanthal code A38E)
| A42P | A60P | A50C | A73/80E | A38E | |
|---|---|---|---|---|---|
| Max. operating temp. | 1200°C (2190°F) | 1300°C (2370°F) | 1300°C (2370°F) | 1300°C (2370°F) | 1200°C (2190°F) |
| H2O absorption as % value | 12-18 | 12-18 | 12-18 | 12-18 | 12-18 |
| Bulk density, g/cm3 (lbs/in3) | 1.9 (0.07) | 2.2 (0.08) | 2.0 (0.07) | 2.2 (0.08) | 1.9 (0.07) |
| Thermal conductivity, W/mK 20-1000°C (68-1830°F) | 460-627 | 627-836 | 460-627 | 627-836 | 460-585 |
| Cold compression strength, kg/cm2 (lbs/in2) | 300 (4267) | 400 (5689) | 300 (4267) | 400 (5689) | 300 (4267) |
| Specific heat, kcal/kg/°C 100-1000°C (210-1830°F) | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Thermal shock resistance | Good | Good | Good | Good | Excellent |
| Thermal expansion coefficient x 10-6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| Resistivity | 10-100 | MΩ cm | 400°C (750°F) | ||
| 1-10 | MΩ cm | 600°C (1110°F) | |||
| 0.1-1 | MΩ cm | 800°C (1470°F) | |||
| 10-100 | kΩ cm | 1000°C (1830°F) |
| A38E | A73E | A80E | A42P | A60P | A50C | |
|---|---|---|---|---|---|---|
| SiO2 | 53.2 | 21 | 12.4 | 47.2 | 30.5 | 37.8 |
| Al2O3 | 38 | 73 | 82.2 | 43 | 60 | 53.5 |
| Fe2O3 | 0.9 | 0.6 | 0.5 | 0.9 | 0.9 | 0.8 |
| MgO | 4 | 0.2 | 0.2 | 0.4 | 0.3 | <0.1 |
| TiO | 0.5 | 0.4 | 0.4 | 0.4 | 0.7 | 0.3 |
| CaO | 0.2 | <0.1 | <0.1 | 0.4 | 0.3 | <0.1 |
| K2O | 1.2 | <0.1 | <0.1 | 0.3 | 0.9 | 3.2 |
| Na2O | <0.1 | <0.1 | <0.1 | 0.2 | 0.1 | 0.1 |
| LiO | <0.1 | <0.1 | 0.3 | <0.1 | <0.1 | <0.1 |
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