Free sample for White Alumina - Micro Sodium White Fused Alumina – Yufa
Free sample for White Alumina - 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 always continually offer you by far the most conscientious customer service, and the widest variety of designs and styles with finest materials. These attempts include the availability of customized designs with speed and dispatch for Free sample for White Alumina - Micro Sodium White Fused Alumina – Yufa , The product will supply to all over the world, such as: Istanbul, Uruguay, Denmark, Our tenet is "integrity first, quality best". We have confidence in providing you with excellent service and ideal products. We sincerely hope we can establish win-win business cooperation with you in the future!
By Joanna from Bangalore - 2018.11.22 12:28
With a positive attitude of "regard the market, regard the custom, regard the science", the company works actively to do research and development. Hope we have a future business relationships and achieving mutual success.
By Hazel from Moscow - 2017.04.18 16:45
