White Calcined Alumina Powder 99.5% CAS 302-74-5 For Ceramics
Calcined Alumina Powder 99.5% For Polishing, Ceramics, Lapping, Coating, Filtration, Milling
1. Calcined Alumina Powder Introduction
Calcined Alumina is produced through the method of advanced high temperature down draught kiln with scientific calcine. These make sure it has the advantages as follows: less trash, high transfer rate, stable contraction, and great variety of goods. The shape is fine sand or powdery with white color, As its equal particle sizes and dispersing easily, it has a good sinterability.
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 and finishing.
- High conversion rate.
- High Purity 99.5-99.8%
3. Calcined Alumina Powder Characteristics
1) excellent chemical activity, see below table
2) resonable particle size (D50=1-75 um)
3) low water absorption rate, big true density, extremly low impurity content
4) wear resistant, heat resistant, corrosion resistant
5) excellent refractory proper
4. Calcined Alumina Powder Particle Sizes Distributions
5. Calcined Alumina Powder Applications
1) especially suitable for producing bulk refractory materials (all kinds of high-aluminium pouring materials)
2) also widely used in producing shaped refractor materials(such as corundum brick)
3) can be used to manufacture masonry materials
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