General introduction :
1. The product series of wollastonite which our company produces
is one kind of natural nonmetal minerals, it takes the form
of fiber and has a needle-like structure as well as a high
length-diameter ratio.
Its main features:
-Good brightness and whiteness
-Low percent of iron, sulphur and phosphorus
-Non-crystallizationed water
-High melting temperature
-Corrosion-resistant,
-Small coefficient of heat expansion
-High refractive
-Reliable performance of sealing, wearability, stability,
etc.
It can take the place of asbestos and glass fiber for its
non-poisonous and tasteless characteristic. All these
featuers
make it the most competitive material in the 21 century.
2. The physical properties and chemical components
:
PHYSICAL
PROPERTY |
CHEMICAL
COMPONENT |
| Coefficient of expansion：mm/mm/℃ |
6.0×10ˉ6 |
SiO2 |
50%min |
| Refractive index： |
1.63 |
CaO |
46%min |
| Melting point： |
1450℃ |
Fe2O3 |
0.3%max |
| hardness： |
4.5～5.0 |
AL2O3 |
0.46%max |
| Specific Gravity： |
2.91 |
MgO |
0.60%max |
| Whiteness： |
88～92 |
MnO |
0.02%max |
| PH：(10% slurry) |
9.8 |
TiO2 |
0.02%max |
| Aspect Ratio |
20～30 |
LOI |
3.0%max |
|
