Product Properties
High purity aluminum oxide is often termed as high purity alumina (HPA). It is a high-value, white, pallet, granular chemical produced commercially either by treating aluminum with specific chemicals or by use of other aluminous feed stock. Some of the most commonly used processes for HPA production include alkoxide process, thermal decomposition process, choline hydrolysis process, and modified Bayer process. Prominent product types offered in the HPA market are 4N HPA-99.99%, 4N5 HPA-99.995%, 5N HPA-99.999%, and 6N HPA- 99.9999%.
Application
High purity alumina Grade – 4N, 4N5, 5N, 6N is utilized in applications such as Application – LEDs, Semiconductors, Phosphor, Li-ion Batteries, Sapphire
Specification
| Product specifications for 4N ,4N5, 5N HPA products | ||||
| Crystal structure | Unit | α | α/ y- | α |
| Purity | % | ≥99.99% | ≥99.995% | ≥99.999% |
| Particle size | μm | D50<0.5, D90<1, | D50<10-40 | D50<10-30 |
| Loose bulk density | g/cm³ | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 |
| BET surface area | ㎡/g | 3-6 | 4-15 | 4-15 |
| Si | ppm | <20 | <2 | <2 |
| Fe | ppm | <10 | <2 | <2 |
| Na | ppm | <10 | <2 | <2 |
| Mg | ppm | <10 | <1 | <1 |
| Ca | ppm | <10 | <1 | <1 |
Package: In 20kg /25kg(bag/ drum)
