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. Our products have better insulating property, heat-resistance, acid & alkali-resistance as well as lower heat expansion coefficient. Particles are different according to different application, and mainly divided into four grades: coarse, medium, fine, superfine .8~20 mesh is mainly used for building materials, playing an important part in water-proof, fire-proof, heat preservation, heat insulation and decoration.
Physical index
|
Heat resistance
|
color
|
Mohs hardness
|
elastic coefficient
|
transparency
|
Melting point
|
disruptive strength
|
purity
|
|
650℃
|
silver white
|
2.5
|
(1475.9~2092.7)×106Pa
|
71.7~87.5%
|
1250℃
|
146.5KV/mm
|
>99%
|
Chemical index
|
SiO2
|
Al2O3
|
K2O
|
Na2O
|
MgO
|
CaO
|
TiO2
|
Fe2O3
|
PH
|
|
44.5~46.5%
|
32~34%
|
8.5~9.8%
|
0.6~0.7%
|
0.53~0.81%
|
0.4~0.6%
|
0.8~0.9%
|
3.8~4.5%
|
7.8
|
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