Perlite P3LW Cryogenic
Applications
- Cryogenic low temperature insulation
- Lightwight filler and extender
Chemical Properties
| Compound | Percentage |
|---|---|
| Silicon | 73% |
| Aluminium | 15% |
| Iron (Fe2O3) | 2% |
| Sodium (Na2O) | 3% |
| Potassium (K2O) | 5% |
| Calcium (CaO) + Magnesium (MgO) | 1% |
| Others | 1% |
| Organic Matter | nil |
| Moisture Content (when packed) | < 0.8% |
Physical Properties
Expanded Perlite P3 is white with a nominal particle size of 0.075 - 1.20 microns.
| Refractive Index | 1.5 |
| Free Moisture (max) | 0.5% |
| pH of Water Slurry | 6.5 - 7.5 |
| Softening Point | 890 - 1100oC |
| Fushion Point | 1280 - 1350oC |
| Specific Heat | 837 J kg-1 K-1 |
| Thermal Condcuctivity (loose poured) | 0.05 W m-1 K-1 |
| Bulk Density (Loose Poured) | 35 - 55 kgm-m |
Grading Specification
The bulk density of Perlite P3 is 35-55 kg/m3 (LW) and 80-90 kg/m3 (HD)
| Sieve Size (mm) | % by weight passing |
| 1.180 | 90 - 100 |
| 0.600 | 70 - 90 |
| 0.300 | 35 - 55 |
| 0.150 | 10 - 30 |
| 0.075 | 0 - 10 |
Note: Nominal particle size indicates the 80% band i.e. up to 10% above of below the specified range