Ultra-low sodium alumina wear-resistant powder WFA white fused alumina F320# F360#
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Ultra-Low Sodium Alumina Wear-Resistant Powder WFA White Fused Alumina F320# F360#
The sodium oxide content of high-purity low-sodium white fused alumina micropowder is less than 0.1%, and the silicon-iron impurity content is also very low. It is processed from high-purity electrically fused white fused alumina through crushing, chemical treatment, water washing and overflow, sedimentation, and drying. High-purity low-sodium white fused alumina has an alpha phase conversion rate of over 97%, a higher specific gravity than medium-sodium white fused alumina, high bulk density, low porosity, high refractory stability, strong high-temperature hardness, low thermal shrinkage and thermal expansion, and excellent thermal stability. It can be used not only in traditional grinding tools, abrasives, and wear-resistant applications but also in advanced alumina ceramics, high-temperature coatings, precision casting, and other industries.
Ultra-Low Sodium Alumina Wear-Resistant Powder WFA White Fused Alumina F320# F360# Features:
1. High bulk density, good compactness, low porosity.
2. High corundum phase content, high hardness, excellent high-temperature strength.
3. High refractory temperature, strong high-temperature stability.
4. Low high-temperature thermal expansion coefficient, strong volume stability.
5. Good chemical stability, resistant to acid and alkali corrosion.
6. High particle concentration uniformity, uniform particle size, good fluidity.
7. Neutral pH, low electrical conductivity.
Typical Chemical Indicators of High-Purity Low-Sodium White Fused Alumina Micropowder:
Chemical Composition | Percentage |
|---|---|
Alumina Al2O3 | 99.6160% |
Silicon Dioxide SiO2 | 0.1188% |
Iron Oxide Fe2O3 | 0.0223% |
Calcium Oxide CaO | 0.0210% |
MgO | 0.0060% |
K2O | 0.0010% |
Na2O | 0.0314% |
TiO2 | 0.0018% |
P2O5 | 0.0015% |
Cr2O3 | 0.0002% |
ZnO | 0.0001% |
V2O5 | 0.0001% |
Typical Physical Indicators of High-Purity Low-Sodium White Fused Alumina Micropowder
Color | White |
|---|---|
Hardness | Mohs 9.0 |
Service Temperature | 1900 ℃ |
Melting Point | 2250 ℃ |
Specific Gravity | 3.95g/cm3 |
Bulk Density | 3.9-3.95 g/cm3 |
Crystal Shape | Multi-angular |
Production Specifications:
JIS Particle Size | D0 (μm) | D3 (μm) | D50 (μm) | D94 (μm) |
|---|---|---|---|---|
#240 | ≤ 127 | ≤ 103 | 57.0±3.0 | ≥ 40 |
#280 | ≤ 112 | ≤ 87 | 48.0±3.0 | ≥ 33 |
#320 | ≤ 98 | ≤ 74 | 40.0±2.5 | ≥ 27 |
#360 | ≤ 86 | ≤ 66 | 35.0±2.0 | ≥ 23 |
#400 | ≤ 75 | ≤ 58 | 30.0±2.0 | ≥ 20 |
#500 | ≤ 63 | ≤ 50 | 25.0±2.0 | ≥ 16 |
#600 | ≤ 53 | ≤ 41 | 20.0±1.5 | ≥ 13 |
#700 | ≤ 45 | ≤ 37 | 17.0±1.5 | ≥ 11 |
#800 | ≤ 38 | ≤ 31 | 14.0±1.0 | ≥ 9.0 |
#1000 | ≤ 32 | ≤ 27 | 11.5.±1.0 | ≥ 7.0 |
#1200 | ≤ 27 | ≤ 23 | 9.5±0.8 | ≥ 5.5 |
#1500 | ≤ 23 | ≤ 20 | 8.0±0.6 | ≥ 4.5 |
#2000 | ≤ 19 | ≤ 17 | 6.7±0.6 | ≥ 4.0 |
#2500 | ≤ 16 | ≤ 14 | 5.5±0.5 | ≥ 3.0 |
#3000 | ≤ 13 | ≤ 11 | 4.0±0.5 | ≥ 2.0 |
#4000 | ≤ 11 | ≤ 8.0 | 3.0±0.4 | ≥ 1.8 |
Main Applications of High-Purity Low-Sodium White Fused Alumina Micropowder:
High-temperature thermal spray materials.
High-quality ceramic grinding wheels.
Insulating powder for electronic ceramic sintering bedding.
Refractory materials such as linings and castables.
Raw material for high-end alumina ceramics like water filtration alumina ceramic membrane tubes.
Shell making and slurry addition in precision casting such as investment casting, replacing zircon sand to reduce casting costs.
| Industry Category: | Construction & Building Materials/Thermal Insulation Materials/Refractory Materials |
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