The specific material is not simply preliminarily processed silica sand.
The product is deeply processed from natural quartz sand and is a pure high-quality raw material with added value many times higher than raw silica sand and is applied in many hightech industries.
Cristobalite material is a variant of quartz at high temperature, with the chemical formula SiO2, but has a different chemical structure than quartz stone.
| GRANULOMETRIC DATA AND PHYSICAL CHARACTERISTICS |
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|
| No. |
Content |
Unit |
Cristobalite powder |
Cristobalite grits |
Method |
| 1 |
Density |
kg/dm3 |
2.28 |
2.25 |
|
| 2 |
Bulk density |
kg/dm3 |
0.68 |
1.00 |
|
| 3 |
Vibrating sieve |
% |
≤ 20 µm: 86.23% |
< 100 µm: 0.15% |
|
| % |
≤ 32 µm: 96.19% |
100-400 µm: 99.77% |
|
| % |
≤ 45 µm: 99.01% |
> 400 µm: 0.08% |
|
| 4 |
Hardness |
Mohs |
6.5 |
6.5 |
|
| 5 |
PH value |
|
9.1 |
9.1 |
|
| 6 |
Colour: L* |
|
97.85 |
96.28 |
X-Rite CI7800 |
| a* |
|
-0.05 |
0.04 |
|
| b* |
|
0.29 |
0.58 |
|
| 7 |
Specific surface |
m2/g |
1.0849 |
0.0674 |
BET Blaine |
| 8 |
Oil absorption |
g/100g |
29.7 |
- |
|
| 9 |
Moisture content |
% |
0.2 |
0.14 |
Moisture balance
MOC-120H |
| CHEMICAL ANALYSIS (XRF) |
| No. |
Chemical composition |
unit |
Cristobalite powder |
Cristobalite grits |
| 1 |
SiO2 |
% |
99.03 |
99.34 |
| 2 |
Fe2O3 |
% |
0.05 |
0.05 |
| 3 |
Al2O3 |
% |
0.38 |
0.08 |
| 4 |
CaO |
% |
0.00 |
0.03 |
| 5 |
K2O |
% |
0.01 |
0.01 |
| 6 |
Na2O |
% |
0.01 |
0.23 |
