Pearlite
Pearlite is a kind of white or light-colored high-quality insulating material made by acid volcanic vitreous lava.It is a non-toxic and odorless material.
Physical and chemical properties of expanded pearlite
(Implementation standards JC/T209-1996)
Physical properties |
Chemical compositions
|
Exterior
|
Grey peppets
|
SiO2
|
68-74
|
Specific gravity
|
2.2-2.4g/cc
|
Al2O3
|
12-16
|
Vickers hardness
|
5.5-7
|
Fe2O3
|
0.1-2
|
Softening point
|
890-1090℃
|
CaO
|
0.15-1.5
|
Melting point
|
1280-1350℃
|
Na2O
|
4-5
|
PH
|
6.5-7.5
|
K2O
|
1-4
|
Liquid solubility
|
<0.1%
|
Loss in burning
|
4-8
|
Acid solubility
|
<2%
|
MgO
|
0.3
|
Dioptre
|
1.483-1.506
|
|
|
Main use:
● It can be used in filter liquid, oil, medicine, food and dirty water.
● It can be used as filling and dilating agent in rubber, painter and plastic, etc.
● It can be used as catalyst in explosives.
● It can be used to absorb floating oil.
● It can be used in agriculture and gardening to improve the soil and withhold water and fertilizer.