Definition; Perlite is a type of volcanic crystal that contains water drops in itself. commercially, when heat up to a right temperature, it expends and forms sponge-like structure. It is a natural, volcanic and acidic crystal. At certain sizes, when heat up to a certain temperature (900 - 1100) it expends to 20 times the original size pops up like a popcorn and transforms itself to a very light material..
1-Isolating Containers
Up to -270 c’s all liquified gases can be kept
at liquifying temperatures in double layered
containers, is possible with perlite.
2- Isolating Ovens
Up to +1050 c’s, perlite is used to prevent heat
loss between oven and the athmosphere.
3- Constructions
Perlite is used in walls, roofs, floors and
ceilings, dividers, and wherever heat and
sound isolation is needed. When used
for isolation, it has great benefits for the
economy of individuals an the country.
4- Molding Industry
Perlite is used in mold sand as an additive.
It is mixed with sand 8-12 % in iron-steel
industry, 20-30 % in other industries.
5- Agriculture
It regulates drainage in agriculture since
its sponge-like nature. These little air-holes
increases filtration while decreasing evaporation.
cuts back the need for water need
in agriculture.
| Technical Properties: | |
| Color | : White, black and their shades |
| Softening Point | : 870 - 1100 °C |
| Melting Point | : 1250 - 1380 °C |
| PH | : 6.5 - 8.0 |
| Specific Heat | : (0.2 Cal/g °C (837 J/Kg.k)) |
| Specific Weight | : 2.2 - 2.4g/cc (2200 - 2400 kg/m3) |
| Free Moisture (%) | : max 0.5 |
| Weight lost | : As intented |
| Heat Conductivity | : 32 - 400 kg/m3 |
| Expanded Density | : 0. 04 W/m.k |
| Melting in Acid | : Melts in concentrated hot alcali and hidrochloric acid melting with concentrated mineral Acid : melts (% 2) Diluded minerals or concentrated weak acids : (% 0.1) |
