Chinese Professional White Alumina Oxide - Micro Sodium White Fused Alumina – Yufa
Chinese Professional White Alumina Oxide - 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 |
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.
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 |
Product detail pictures:
Related Product Guide:
Like a result of ours specialty and repair consciousness, our enterprise has won a superb popularity amid buyers everywhere in the environment for Chinese Professional White Alumina Oxide - Micro Sodium White Fused Alumina – Yufa , The product will supply to all over the world, such as: Croatia, Brasilia, Lithuania, Being guided by customer demands, aiming at improving the efficiency and quality of customer service, we constantly improve products and provide more comprehensive services. We sincerely welcome friends to negotiate business and start cooperation with us. We hope to join hands with friends in different industries to create a brilliant future.
By Pearl Permewan from Bahamas - 2018.12.11 14:13
The company keeps to the operation concept "scientific management, high quality and efficiency primacy, customer supreme", we have always maintained business cooperation. Work with you,we feel easy!
By Kimberley from UK - 2017.06.22 12:49
