Super Lowest Price White Alumina Oxide Grains - Micro Sodium White Fused Alumina – Yufa
Super Lowest Price White Alumina Oxide Grains - Micro Sodium White Fused Alumina – Yufa Detail:
Compared With β-Al2O3 And α-Al2O3
Sodium oxide is a harmful impurity to white corundum. It forms β-Al2O3 with alumina in the molten state, and the amount of production increases with the increase of sodium oxide content. Na2O in white corundum mainly appears in the form of Na2O·11AL2O3 (β-Al2O3). For example, if the alumina raw material contains more than 0.6% sodium oxide, the white corundum produced with it will contain more than 10% β-Al2O3.
Compared with β-Al2O3, α-Al2O3 has ‘three highs’. First, it has a high melting point, Secondly a high density, and thirdly a high hardness, as shown in the following table:
| Phase | Chemical compositions | Crystal System | Density (g/cm3） | Micro hardness (Kg/mm²) | Melting point (℃) |
| α-Al2O3 | Al2O3 | Hexagonal | 4.0 | 2300 | 2050 |
| β-Al2O3 | Na2O·11Al2O3 | Trigonal | 3.24 | 1300~1600 | 1600 |
Chemical Composition
| Chemical Composition | Na2O % ≤ | Al2O3 % ≥ | SiO2 % ≤ | Fe2O3 % ≤ |
| Gurantee Value | 0.06 | 99.7 | 0.1 | 0.05 |
| Typical Value | 0.02 | 99.89 | 0.04 | 0.03 |
Advantages
The micro-sodium white fused alumina improves the melting point, particle density, bulk density, flexural strength, compressive strength, true density, hardness and other properties of white corundum products, laying a solid foundation for the product to enter the high-end market.
Applications
It is suitable for processing alloy steel, high hardness steel, high carbon steel and other materials with high hardness and high tensile strength.
Product detail pictures:
Related Product Guide:
We're commitment to offer you the competitive price ,remarkable products excellent, also as fast delivery for Super Lowest Price White Alumina Oxide Grains - Micro Sodium White Fused Alumina – Yufa , The product will supply to all over the world, such as: Ukraine, Surabaya, United States, If any product meed your demand, remember to feel free to contact us. We're sure your any inquiry or requirement will get prompt attention, high-quality merchandise, preferential prices and cheap freight. Sincerely welcome friends all over the world to call or come to visit, to discuss cooperation for a better future!
By Ellen from Nigeria - 2018.06.26 19:27
We have worked with many companies, but this time is the best，detailed explanation, timely delivery and quality qualified, nice!
By Nick from Malta - 2018.05.15 10:52
