D50 99% Calcined Alumina Powder High Purity With Good Brightness
High Purity and Conversion Rate Calcined Alumina Powder for High Alumina Ceramic
1. Calcined Alumina Introduction
Calcined alumina is generally used in the manufacture of high-grade ceramic shapes, refractories and fused alumina abrasives. Alumina has a very high melting temperature (about 2000C) and alumina ceramics can maintain up to 90% of their strength above 1100C. They are thus employed in many refractory materials (i.e. Calcium Aluminate Cements have PCEs above cone 35) and used to make parts that must withstand high temperature.
2. Calcined Alumina Powder Specifications
| Type | Median sodium | Low sodium | ||||||
| Brand | AW-4M | AW-12M | AW-SF | AW-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
- Stable quality.
- Enjoy very good reputation.
- Good brightness,
- Good finishing.
- High conversion rate.
3. Calcined Alumina Powder Characteristics
- High refractoriness.
- High Alumina content.
- High volume density.
- Physicochemical stability.
- Fully calcined.
- Low Dust content.
4. Calcined Alumina Powder Particle Sizes Distributions
5. Calcined Alumina Powder 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
7. Ceramic Insulators for Spark plugs
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