Factory wholesale White Corundum Grains - Micro Sodium White Fused Alumina – Yufa
Factory wholesale White Corundum 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 have advanced equipment. Our products are exported to the USA, the UK and so on, enjoying a good reputation among customers for Factory wholesale White Corundum Grains - Micro Sodium White Fused Alumina – Yufa , The product will supply to all over the world, such as: Libya, USA, Danish, We are always creating new technology to streamline the production, and provide goods with competitive prices and high quality! Customer satisfaction is our priority! You can let us know your idea to develop unique design for your own model to prevent too much similar parts in the market! We will offer our best service to satisfy all your needs! Please contact us right away!
By Nicci Hackner from Pakistan - 2017.03.08 14:45
Reasonable price, good attitude of consultation, finally we achieve a win-win situation,a happy cooperation!
By Diego from Cannes - 2017.01.28 18:53
