Precipitated Barium Sulphate
Also known as blanc fixe, this high purity, synthetically-produced barium sulphate product acts as an extender in the production of paints, coatings and plastics. It is completely inert and possesses high resistance to outdoor exposure and other chemicals. APM’s Chinese source of blanc fixe has an extremely fine particle size of 0.7 µm and a narrow particle size distribution, ideally-suited for high gloss applications.
Specification
Precipitated Barium Sulphate
APM can supply different product sizings according to customer requirements.
Chemical Properties
| BaSO4 | 99% min |
| Barium | 57% min |
| Ba | 0.85% (TCLP, ppm) |
| SrSO4 | 202 (ppm) |
| Alum | 21.7 (ppm) |
| Silicon | 168 (ppm) |
| Chloride | 68.5 (ppm) |
| Titanium | 8.4 (ppm) |
| Sodium Oxide | 603 (ppm) |
| CaO | 293 (ppm) |
| Fe2O3 | 7.8 (ppm) |
| PbO | <1.0 (ppm) |
| Bi2O3 | <1.0 (ppm) |
| As | <1.0 (ppm) |
Physical Properties
| Median Particle Size | 0.7 μm |
| L.O.I. | 1.06% |
| Specific Gravity | 4.4 |
| Color – Hunter L | 98.8 |
| Brightness | 96 |
| Moisture | 0.13% |
| Refractive Index | 1.64 |
| Hegman Fineness | 8 |
| pH | 8.0 |
| Mohs Hardness | 3.0 |
