Perlite belongs to the group of anorganic insulation materials, or more precisely to the mineral foam insulations. Perlite is a silicate stone of volcanic origin, which is why it is frequently known as volcano stone or obsidian. Due to its origin, we would refer to this stone as a natural glass from its chemical composition (alkali content 7-8%). The mineral name perlite came from the French mineralogist, François Sulpice Beudant, during his mineralogical tours around Hungary in the year 1818, due to the pearl-shaped structure.
Perlit / Perlite
Perlite has the property that it increases 20 times in volume when
heated (in the blowing process). The reason for this is the crystal
water contained in the raw perlite stone mix which vaporises when
heated. This produces pumice-like products with extremely thin pore
walls which can be processed into very valuable thermal insulation
materials for construction.
Perlite is an environmentally-friendly product which can be returned to nature as a recyclable material.
Perlite is an important basic module in construction, industry, fire protection, gardening and animal care.
Perlite is an important basic module in construction, industry, fire protection, gardening and animal care.
| Typical chemical analysis | |
| SiO2 | 60-80% |
| CaO | 0 - 2% |
| Al2O3 | 12-16% |
| MgO | 0 - 1% |
| TiO2 | 0 - 1% |
| Na2O | 5 - 10% |
| Fe2O3 | 0 - 1% |
| K2O | 2 - 5% |
| Technical data | |
| Conductivity value λ | 0.050 W/(m*K) |
| Granulation: | 0-6 mm |
| Bulk weight approx. | 85 kg/m³ +20% |
| Pure density | 2.0 - 2.2g/cm³ |
| Strength | 0.01MN/m² |
| Form | grain |
| Colour | white/grey-white |
| Annealing loss | < 1weight % |
| pH value | ~ 7 |
| Hygroscopic equilibriummoisture | < 1.5 weight % |
