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Perlite P25 Special

Applications

Chemical Properties

Perlite P25 is an aluminium silicate. Typical composition is:

CompoundPercentage
Silicon73%
Aluminium15%
Iron (Fe2O3)2%
Sodium (Na2O)3%
Potassium (K2O)5%
Calcium (CaO) + Magnesium (MgO)1%
Others1%
pH6.5 - 7.5
Organic Matternil
Moisture Content (when packed)< 0.8%

Physical Properties

Expanded Perlite P25 is white with a nominal particle size of 2.0 - 3.5.

Refractive Index1.5
Free Moisture (max)< 0.5%
pH of Water Slurry6.5 - 7.5
Softening Point890 - 1100oC
Fushion Point1280 - 1350oC
Specific Heat837 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