Refractory Calcined Alumina Powder White With High Sintering Activity
High Purity and Conversion Rate Calcined Alumina Powder 99.5% for Refractories Application
1. Calcined Alumina Powder Introduction
EK series α-AL2O3 powder, on the basis of establishing the control model of fine particle size, effectively controls and optimizes the particle size distribution. Meanwhile it makes phase change and surface modification to own small crystal grain size and crystal-like, spherical-like properties.
Our α-AL2O3 powder has the unique high sintering activity, small grain size, high phase rate, the controllable crystal form and other basic characteristics to make it suitable for castable applications: excellent strength, adequate dense packing, very low water consumption, excellent bulk stability, excellent castable flowability and pumpability. In ceramic industry, it can be easy to sintering, sintered dense, good volume stability and other characteristics.
2. Calcined Alumina Powder Specifications
| Type | Median sodium | Low sodium | ||||||
| Brand | EK-4M | EK-12M | EK-SF | EK-06L | ||||
| composition% | Guarantee value | Typical value | Guarantee value | Typical value | Guarantee value | Typical value | Guarantee value | Typical value |
| AL2O3 | ≥99 | 99.37 | ≥99 | 99.34 | ≥98.5 | 99.08 | ≥99 | 99.34 |
| SiO2 | ≤0.2 | 0.10 | ≤0.2 | 0.12 | ≤0.2 | 0.10 | ≤0.2 | 0.11 |
| Fe2O3 | ≤0.2 | 0.06 | ≤0.2 | 0.08 | ≤0.2 | 0.13 | ≤0.2 | 0.08 |
| Na2O | ≤0.3 | 0.25 | ≤0.25 | 0.18 | ≤0.25 | 0.13 | ≤0.25 | 0.10 |
| True density g/cm3 | ≥3.95 | 3.96 | ≥3.92 | 3.94 | ≥3.92 | 3.94 | ≥3.92 | 3.95 |
| Median particle diameter D50μm | 3~5 | 3.47 | 0.9~1.5 | 0.93 | 1.5~2.5 | 1.66 | 0.9~1.5 | 1.13 |
| α-AL2O3 inversion ratio % | ≥95 | ≥95 | ≥95 | ≥95 | ||||
| Particle distribution | Unimodal | Unimodal | Bimodal | Bimodal | ||||
| Inspection standard | GB/T3044-89；GB3604-83 | |||||||
3. Calcined Alumina Powder General Advantages
- Good volume stability.
- unique high sintering activity.
- Good brightness,
- Good finishing.
- High conversion rate.
3. Calcined Alumina Powder Characteristics
- Excellent strength.
- High Alumina content.
- High volume density.
- Physicochemical stability.
- Fully calcined.
- Low Dust content.
4. Calcined Alumina Particle Sizes Distributions
5. Calcined Alumina Applications
1. Ceramic grade alumina (CA) series products,
2. Refractory level alumina (RA) series products,
3. LCD glass (Special glass) Alumina (SA) series products,
4. Alumina (PA) series products for polishing, filler
5. Calcined Low-Sodium Alumina Coarse Powder (HA) Series
6. Ceramic granulation powder and Ceramic Insulators for Spark plugs
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