MATERIAL PROPERTIES CHART
| STEATITE | CORDIERITE | ||
| Property | Unit | MC-L3 High strength with good electrical properties. | MC-C Excellent resistance to thermal shock with relatively low porosity. |
| Water Absorption | % | 0 impervious | 0-1 |
| Specific Gravity | 2.5 | 2.3 | |
| Color | Off White | Gray – White | |
| Safe temp. at continuous heat | °F | 1870° | 2120° |
| Hardness MOH’s Scale | 7.5 | 7 | |
| Coefficient of thermal exp. | Per °C (25-900°C) | 8.5 x 10-6 | 3.7 x 10-6 |
| Tensile strength | Lb/in2 | 8,500 | 3,100 |
| Flexural strength | Lb/in2 | 18,000 | 15,000 |
| Compressive strength | Lb/in2 | 80,000 | 50,000 |
| Dielectric strength | Volts/mil | 225 | 200 |
| Dielectric constant | @1MHz | 5.9 | 5.3 |
| Loss Factor | @1MHz | 0.021 | 0.025 |
| Resistance to impact | In-lbs. | 4.5 | 4 |
STEATITEMC-L3 High strength with good electrical properties. |
||
|---|---|---|
| Property | Unit | |
| Water Absorption | % | 0 impervious |
| Specific Gravity | 2.5 | |
| Color | Off White | |
| Safe temp. at continuous heat | °F | 1870° |
| Hardness MOH’s Scale | 7.5 | |
| Coefficient of thermal exp. | Per °C (25-900°C) | 8.5 x 10-6 |
| Tensile strength | Lb/in2 | 8,500 |
| Flexural strength | Lb/in2 | 18,000 |
| Compressive strength | Lb/in2 | 80,000 |
| Dielectric strength | Volts/mil | 225 |
| Dielectric constant | @1MHz | 5.9 |
| Loss Factor | @1MHz | 0.021 |
| Resistance to impact | In-lbs. | 4.5 |
CORDIERITEMC-C Excellent resistance to thermal shock with relatively low porosity. |
||
|---|---|---|
| Property | Unit | |
| Water Absorption | % | 0-1 |
| Specific Gravity | 2.3 | |
| Color | Gray – White | |
| Safe temp. at continuous heat | °F | 2120° |
| Hardness MOH’s Scale | 7 | |
| Coefficient of thermal exp. | Per °C (25-900°C) | 3.7 x 10-6 |
| Tensile strength | Lb/in2 | 3,100 |
| Flexural strength | Lb/in2 | 15,000 |
| Compressive strength | Lb/in2 | 50,000 |
| Dielectric strength | Volts/mil | 200 |
| Dielectric constant | @1MHz | 5.3 |
| Loss Factor | @1MHz | 0.025 |
| Resistance to impact | In-lbs. | 4 |
LASER FLASH THERMAL CONDUCTIVITY RESULTS
| Sample | Bulk Density ρ@ 25°C (g/cm³) |
Temperature
(°C) |
Temperature
(°F) |
Specific Heat Cp (J/g · K) |
Diffusivity
(cm²/s) |
Conductivity
(W/m · K) |
| L-3 Steatite | 2.19 | 1204 | 2200 | 1.53 | 0.00638 | 2.14 |
| Grade A Lava- Hard | 2.38 | 1204 | 2200 | 1.42 | 0.00687 | 2.32 |
| Grade A Lava- LavaReq. | 2.31 | 1093 | 2000 | 1.39 | 0.00619 | 1.98 |
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