Edelkorund is corundum consisting of at least 99.5% alumina (aluminum oxide), and is a suitable product for high-tech applications. It is white due to its low proportion of impurities, and polycrystalline structure. Manufacturers in the medical technology, aerospace engineering, optical and electronic industries, among others, benefit from this iron-free material with the highest purity and extreme hardness. Download datasheet
| Quantity | Discount | Price per kg |
|---|---|---|
| 25 – 475 kg | – | € 5.93 |
| 500 – 975 kg | 18% | € 4.86 |
| 1,000 – 2,975 kg | 48% | € 3.095 |
| 3,000 – 4,975 kg | 50% | € 2.989 |
| 5,000 kg and more | 51% | € 2.921 |
| Displayed prices include all applicable surcharges (scrap, energy, sea freight and gas surcharge, depending on the product type). | ||
| Quantity | Discount | Price per kg |
|---|---|---|
| 1 – 499 kg | - | € 6.13 |
| 500 – 999 kg | 18% | € 5.04 |
| 1,000 – 2,999 kg | 47% | € 3.23 |
| 3,000 – 4,999 kg | 49% | € 3.123 |
| 5,000 kg and more | 50% | € 3.056 |
| Displayed prices include all applicable surcharges (scrap, energy, sea freight and gas surcharge, depending on the product type). | ||
| Properties | Values |
|---|---|
| Hardness | 9 mohs |
| Grain shape | lacy |
| Melting point | approx. 2050ºC |
| Specific gravity | approx. 3.9 – 4.1 g/cm³ |
| Bulk density (depending on dimensions) | approx. 1.4 – 2.1 g/cm³ |
| Component | Percent |
|---|---|
| AI² O³ | 99,73 % |
| Na² O³ | 0,14 % |
| Fe² O³ | 0,03 % |
| SiO² | 0,01 % |
| CaO | 0,02 % |
| TiO² | 0,02 % |
| MgO | 0,01 % |
