Chemical CompositionPhysical properties of Perlite
SiO2 : 72-74%

AL2O3 : 13-14%

TiO2 : 0,06%

Fe2O3 : 0,6-0,7%

CaO : 0,2-0,75%

MgO : 0,1-0,26%

Na2O3: 3.0-4.0%

K2O : 4,78%

Organic substances: none

Inert Material: Max 1.0 ml/50gr.

Hygroscopicity: none

  • Colour: Very light white powder
  • Free moisture, max. 0,1%: 0.1 when leaving factory pH (of water slurry): 6-8 suspension 10%
  • Bulk density 100-170 kg/m³
  • Particle size: 5-50µ average
  • Softening temperature: 1100ºC
  • Melting point: 1350ºC
  • Solubility: Soluble in hot concentrated alkali and HF, moderately soluble (<10%) in 1 N NaOH. Slightly soluble (<3%) in mineral acids (1N). Very sightly soluble (<1%) in water or weak acids.
  • Beer soluble Iron (ppm) 15,0- = from 10-50

 

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