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Perlite P321 Through Grade

Applications

Chemical Properties

Perlite P321 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)nil

Physical Properties

Expanded Perlite P321 is white with a nominal particle size of 0.15 - 6.0 mm

Refractive Index1.5
Free Moisture (max)0.5%
pH of Water Slurry6.5 - 8.0
Softening Point890 - 1100oC
Fushion Point1280 - 1350oC
Specific Heat837J/kgK (0.2 cal/gc)
Thermal Condcuctivity (loose poured)0.05 w/mC

Grading Specification

The bulk density of Perlite P321 is 90 - 120 kg/m3.

Sieve Size% by weight passing
4.7590 - 100
2.40 50 - 80
1.20 10 - 30
600 micron 10 - 30
300 micron0 - 5

Note: Nominal particle size indicates the 80% band i.e. up to 10% above of below the specified range