Cordierite
| GROUP | Gc. cordierite | |||
| Product code | Gc-mull | Gc-cord | Gc-Al-cord | |
| FEATURE OF COMPOSITION | Mullet | Cordarite | Cordarite & Alumina | |
| APPLICATION RANGE | Good resistance to thermal shock, good refractoriness suited for heating elements. | Good resistance to thermal shocks especially suited for thermal and thermo electrical applications. | Good mechanical strength, high refractoriness, excellent resistance to thermal shocks, especially suited for thermal and thermo electrical applications. | |
| PROPERTIES | |||||
| COLOUR | Tan | Tan | Tan | ||
| POROSITY (Vol. %) | 37 | 20 | 30 | ||
| BULK DENSITY (g/cm2) | 1.90 | 1.90 | 2.10 | ||
| HARDNESS (Mohs Scale) | 6 to 6.5 | 6 to 6.5 | 6 to 6.5 | ||
| FLEXURAL STRENGTH (N/mm2) |
Unglazed | 30 | 30 | 35 | |
| Glazed | – | – | – | ||
| THERMAL EXPANSION LINER COEFFICENT (10-6 K-1) |
a20 – 10000c | 6.70 | 3.40 | 2.65 | |
| a20 – 3000c | 6.00 | 2.65 | 1.60 | ||
| a20 – 6000c | 6.60 | 3.10 | 2.50 | ||
| THERMAL SHOCK RESISTANCEMIN. (K) | 350 | 300 | 350 | ||
| THERMAL CONDUCTIVITY (20-100C) | – | 2.0 | 2.0 | ||
| VOLUME RESISTIVITY IN TERMS OF TEMPERATUR E (D.C.)cm |
200C | – | – | 1010 | |
| 2000C | – | 109 | 106 | ||
| 6000C | – | 105 | – | ||