99.6% White corundum powder 325#
99.6% white corundum powder 325# is suitable for high quality refractory castables and precise casting shell mold refactory material. With Al2O3 purity 99.6% and Na2O content less than 0.1%, it gains excellent refractoriness, good corrosion and thermal shock resistance.
Product Feature of 99.6% White corundum powder 325#
- High Aluminum oxide purity and high alpha Al2O3 ratio.
- Low Na2O content less than 0.1%.
- Superior refractorieness.
- Excellent thermal shock resistance and corrosion resistance.
Typical physical properties:
| Hardness: | Mohs:9.0 |
| α-Al2O3 conversion ratios | Min 90% |
| Maximum service temperature: | 1900 centigrade |
| Melting Point: | 2250 centigrade |
| Specific Gravity: | 3.95g/cm3 |
| Volume density | 3.6g/cm3 |
| Bulk density(LPD): | 1.55-1.95 g/cm3 |
| Color: | White |
| Particle shape: | Angular |
Typical Chemical composition:
| Item | Guarantee Value | Typical Value |
| AL2O3 | ≥99.6% | 99.65% |
| NA2O | ≤ 0.1% | 0.095% |
| SiO2 | ≤ 0.1% | 0.068% |
| Fe2O3 | ≤ 0.05% | 0.042% |
Particle size distribution:
| Size | Guarantee Value | Typical Value |
| +325mesh（45um） | ≤ 10% | 8.1% |
| -325mesh（45um） | ≥90% | 91.9% |
Main Application:
- High quality refractory castables.
- Lost wax precise casting shell material.
- thermal conducting coatings.
- Ceramic casting filter.
Production details:
Product Qualification of White fused alumina
Packing of White fused alumina
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