Brief Description
Active alumina powder refers to powdered alumina products with reactive or adsorption activity under certain conditions. It is usually made of industrial aluminum hydroxide powder, which is heated, melted and recrystallized in an electric arc furnace.
In the field of refractory materials, the addition of activated alumina powder can improve the bulk density, flexural strength and compressive strength of refractory castables, and is also beneficial to improve the high temperature performance and slag resistance of the material.
Technical Data
| ltem | RSAA-101 | RSAA-102 | RSAA-103 | RSAA-202 | ||||
| Warranted | Typical | Warranted | Typical | Warranted | Typical | Warranted | Typical | |
| Al₂O₃,% | ≥99.50 | 99.52 | ≥99.50 | 99.6 | ≥99.50 | 99.53 | ≥99.50 | 99.66 |
| K₂O+Na₂O,% | ≤0.20 | 0.13 | ≤0.20 | 0.14 | ≤0.25 | 0.15 | ≤0.15 | 0.1 |
| Fe₂O₃,% | ≤0.05 | 0.02 | ≤0.05 | 0.02 | ≤0.08 | 0.03 | ≤0.05 | 0.02 |
| SiO₂,% | ≤0.15 | 0.08 | ≤0.15 | 0.08 | ≤0.15 | 0.09 | ≤0.15 | 0.07 |
| D50,μm | ≤2.0 | 1.7 | 2.0-3.0 | 2.4 | 3.0-5.0 | 3.5 | 2.0-3.0 | 2.5 |
| Particle Distribution Characterization | single-peak | single-peak | single-peak | double-peak | ||||
| α-Al₂O₃ Phase,% | ≥93 | 95 | ≥93 | 95 | ≥93 | 96 | ≥93 | 96 |
| True density g/cm³ | ≥3.93 | 3.96 | ≥3.93 | 3.96 | ≥3.93 | 3.96 | ≥3.94 | 3.97 |
Application Of Alumina Powder
1. Ceramics: microcrystalline ceramics, microcrystalline alumina balls;
2. Electronics: coatings;
3. Unshaped refractory materials: castables, self-flowing materials, ramming materials, gunning materials, plastics, etc.;
4. High-end kiln furniture;