Pages : 1 - 2 THERMAL PROPERTIES
APPLICATIONS
| Average C0-efficient expansion 0º to 800º C | 5.5 X 10-7/ºC | |
| Thermal Conductivity | Temp | CAl |
| 20ºC | cm-1 Sec-1 ºC-1 | |
| 36 X 10-4 | ||
| 100ºC | 38 X 10-4 | |
| 250ºC | 41 X 10-4 | |
| 500ºC | 50 X 10-4 | |
| 800ºC | 57 X 10-4 | |
| 1000ºC | 65 X 10-4 | |
| Specific heat | Temp | Cal/g |
| ºC | ||
| 0 | 0.166 | |
| 100 | 0.200 | |
| 500 | 0.275 | |
| 1000 | 0.290 | |
| Softening temp. | 1700ºC | |
| Annealing temp. | 1150ºC | |
| Working temp. | 1900ºC to 2000ºC | |
| Operating temp. (Continuous) | 1050ºC | |
| Operating temp. (intermittent) | 1350ºC | |
| 1. | Silicaware for Chemical, Physical & Routine |
| 2. | Wool & Fibre for high temperature insulation, |
| 3. | Tubes & muffles for gas & electrically heated furnaces, including vaccum furnaces |
| 4. | Basins, Pots, Cooling coils, etc. for nufacture of pure chemicals |
| 5. | Electric immersion heaters for acid pickling & electroplating tanks |
| 6. | Component material in refractory & Ceramic mixtures to reduce tendency to Spalling |
| 7. | Tubes & rods for use as cores & core supports in precision casting |
| 8. | Lenses, Prisms & Discs for optical work & as optical flats |
| Apparatus of complicated design is now in demand for fundamental research work. INFUSIL, especially the transparent variety, is used wherever high temperatures are encountered or where high transparency is required. We also undertake the manufacturing of special apparatus to suit customers specifications. | |
ELECTRICAL PROPERTIES
PHYSICAL PROPERTIES
| Dielectric constant | 3.70 | CAl |
| Specific resistivity | Temp Sp. | Resistivity ohm-cm |
| ºC | (of the order of) | |
| 20 | 1018 | |
| 200 | 1013 | |
| 600 | 108 | |
| 1000 | 106 | |
| Electrical breakdown strength at 20ºC 25-400KV-cm | ||
| Density | 2.2g/cm3 |
| Hardness | 6-7 Mohs |
| Poisson’s ratio | 0.17 |
| Young’s Modulus | 7.4 X105 Kgs/cm2 |
| Tensile strength | 600 to 700 Kgs/cm2 |