Perlite P25 Special
Applications
- Textured coatings
- Horticulture
- Ship decking compounds
- Chimney lining
- Fireproof door cores
Chemical Properties
| Compound | Percentage |
|---|
Perlite P25 is an aluminium silicate. Typical composition is:
| Silicon | 73% |
| Aluminium | 15% |
| Iron (Fe2O3) | 2% |
| Sodium (Na2O) | 3% |
| Potassium (K2O) | 5% |
| Calcium (CaO) + Magnesium (MgO) | 1% |
| Others | 1% |
| pH | 6.5 - 7.5 |
| Organic Matter | nil |
| Moisture Content (when packed) | < 0.8% |
Physical Properties
Expanded Perlite P25 is white with a nominal particle size of 2.0 - 3.5.
| 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/mC |
| Bulk Density (Loose Poured) | 50 - 75 kg m-1 |
Typical Grading
| Sieve Size | % by weight passing |
| 2.360 | 70 -100 |
| 1.700 | 25 - 55 |
| 1.180 | 0 - 10 |
| 0.600 | 0 - 5 |
Note: Nominal particle size indicates the 80% band i.e. up to 10% above of below the specified range
