NABALOX
NABALOX® aluminum oxides are characterized by their high chemical purity and very good abrasion resistance.
Applications for NABALOX
- Chemical industry
- Glass industry
- Corundum
- Refractory industry
- Household ceramics
- Wear-resistant ceramics
- Electrical ceramics
- Engineering ceramics
Polishing Aluminas
The special qualities of NABALOX aluminas are successfully used worldwide as polishing media. The NABALOX polishing oxide range offers a broad spectrum of soft and hard calcined aluminas for the various areas of industrial surface finishing. A multitude of NABALOX types are used for the production of polishing pastes and emulsions for almost any material group, such as metal, stone, plastic, car paint, semiconductors, special glasses and many others.
Soft Calcined, Fine Ground Aluminas
- Refactories – Due to their typical primary crystal size of 0.2 µm and below, the soft calcined aluminas of NABALOX are an ideal viscosity adjusting agent for gunning mixes and mouldable materials. It is therefore possible to achieve the desired consistency without organic plasticisers or clay minerals which guarantees a high refractoriness.
- Glazes – Due to its high reactivity and constant grain size, NABALOX soft calcined aluminas are the ideal AI2O3 carrier for high-quality glazes and stains.
- Ceramic Inks – The defined fine grain size distribution of NABALOXÂ soft calcined aluminas allows them to be used for digital printing with ceramic inks, without the need of further refinement steps.
- Polishing Media – Low agglomeration, narrow particle size distribution and constant oil absorption are the properties of NABALOX soft calcined aluminas. These characteristics guarantee outstanding results in applications, such as suspensions and pastes.
- Technical Ceramics – Due to its high specific surface area NABALOX soft calcined aluminas are ideally suited for the manufacture of catalyst supports and filtration media with high porosity and a low shrinkage tolerance.
Features & Benefits
- Low sintering temperature
- Wide sintering range
- Flexible processing
- High sintered densities
- Optimized flow properties
- Optimized packing density
- High wear and impact resistance
- Excellent dielectric properties insulation
- High mechanical strength
- Excellent high temperature properties
- Dimensional accuracy
- Optimized chemical resistance
- Low water demand
- High thermal shock resistance
- Long durability in kiln application
Properties
| Analysis | Unit | NO 104 RA | NO 105 | NO 105 RA | NO 105-71 |
| Al2O3* | % | 99.8 | 99.6 | 99.8 | 99.8 |
| SiO2 | % | 0.02 | 0.02 | 0.02 | |
| Na2O Total | % | 0.1 | 0.3 | 0.1 | 0.1 |
| Fe2O3 | % | 0.03 | 0.03 | 0.03 | 0.03 |
| Specific Surface Area (BET) | m2/g | 4 | 0.6 | 0.7 | 0.5 |
| α-Al2O3-content | % | 98 | 98 | 98 | 98 |
| Median Grain Size | µm | 80 | 80 | 80 | 80 |
| Primary Crystal Size | µm | 0.5 | 2 | 2 | 2 |
| Specific Density | g/cm3 | 3.9 | 3.9 | 3.9 | 3.9 |
| Analysis | Unit | NO 115-71 | NO 115 G | NO 115-25 | NO 115 TC | NO 125 TC | NO 135 | NO 315 | NO 325 |
| Al2O3* | % | 99.6 | 99.6 | 99.6 | 99.6 | 99.8 | 99.6 | 99.6 | 99.7 |
| SiO2 | % | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
| Na2O Total | % | 0.3 | 0.3 | 0.3 | 0.3 | 0.1 | 0.3 | 0.3 | 0.1 |
| Fe2O3 | % | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
| Specific Surface Area (BET) | m2/g | 0.8 | 0.9 | 0.9 | 1 | 1 | 0.8 | 1.5 | 1.5 |
| α-Al2O3-content | % | 98 | 98 | 98 | 98 | 98 | 98 | 98 | |
| Median Grain Size | µm | 5 | 6 | 5 | 4 | 4 | 5 | 3 | 3 |
| Primary Crystal Size | µm | 3 | 2 | 2 | 2 | 2 | 3 | 2 | 2 |
| Ceramic Properties** | | | | | | | | | |
| Specific Density | g/cm3 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 |
| Green Density*** | g/cm3 | 2.27 | 2.33 | 2.30 | 2.31 | 2.29 | 2.33 | 2.37 | 2.34 |
| Sintered Density | g/cm3 | 3.10**** | 3.44**** | 3.41**** | 3.51**** | 3.66**** | 3.10**** | 3.54**** | 3.74**** |
| Sintering Temperature | °C | 1750 | 1750 | 1750 | 1750 | 1750 | 1750 | 1750 | 1750 |
| Isotropic Linear Shrinkage | % | 11 | 13 | 13 | 14 | 15 | 9 | 14 | 16 |
| Analysis | Unit | NO 265 | NO 113 | NO 313 |
| Al2O3* | % | 99.6 | 99.6 | 99.6 |
| SiO2 | % | 0.03 | 0.03 | 0.03 |
| Na2O Total | % | 0.3 | 0.3 | 0.3 |
| Fe2O3 | % | 0.03 | 0.03 | 0.03 |
| Specific Surface Area (BET) | m2/g | 8 | 9 | 11 |
| α-Al2O3-content | % | 70 - 90 | 70 - 90 | 70 - 90 |
| Median Grain Size | µm | 6 | 3 | 2 |
| Primary Crystal Size | µm | < 0.5 | < 0.5 | < 0.5 |
| Ceramic Properties** | | | | |
| Specific Density | g/cm3 | 3.85 | 3.85 | 3.85 |
| Green Density*** | g/cm3 | Not Detected | 1.85 | 1.90 |
| Sintered Density | g/cm3 | Not Detected | 3.48**** | 3.60**** |
| Sintering Temperature | °C | - | 1750 | 1750 |
| Isotropic Linear Shrinkage | % | Not Detected | 20 | 21 |
| Analysis | Unit | NO 615-10 | NO 625-10 | NO 715-10 | NO 725-10 | NO 613-10 | NO 713-10 RF | NO 713-10 | NO 713-10 MF |
| Al2O3* | % | 99.6 | 99.8 | 99.6 | 99.8 | 99.7 | 99.7 | 99.7 | 99.8 |
| SiO2 | % | 0.03 | 0.03 | 0.03 | 0.03 | 0.05 | 0.05 | 0.05 | 0.05 |
| Na2O Total | % | 0.3 | 0.1 | 0.3 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| MgO (doped) | % | - | - | - | - | - | - | 0.1 | - |
| Fe2O3 | % | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
| Specific Surface Area (BET) | m2/g | 1.6 | 1.6 | 2 | 2 | 6 | 7 | 7 | 7 |
| α-Al2O3-content | % | 98 | 98 | 98 | 98 | 95 | 95 | 95 | 95 |
| Median Grain Size | µm | 2.5 | 2.5 | 2 | 2 | 1 | 0.8 | 0.8 | 0.8 |
| Primary Crystal Size | µm | 2 | 2 | 2 | 2 | < 0.5 | < 0.5 | < 0.5 | < 0.5 |
| Ceramic Properties** | | | | | | | | | |
| Specific Density | g/cm3 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 |
| Green Density*** | g/cm3 | 2.37 | 2.39 | 2.36 | 2.35 | 2.20 | Not Detected | 2.25 | 2.32 |
| Sintered Density | g/cm3 | 3.77**** | 3.85**** | 3.80**** | 3.89**** | 3.88 | Not Detected | 3.95 | 3.89 |
| Sintering Temperature | °C | 1750 | 1750 | 1750 | 1750 | 1600 | - | 1600 | 1600 |
| Isotropic Linear Shrinkage | % | 15 | 16 | 15 | 17 | 18 | Not Detected | 18 | 17 |
| Analysis | Unit | NO 615-30 | NO 625-30 | NO 625-31 | NO 530 | NO 645 | NO 652 | NO 660 |
| | Ceramic Grade | Refractory Grade | Ceramic Grade | Refractory Grade | Refractory Grade | Refractory Grade | Refractory Grade |
| Al2O3* | % | 99.6 | 99.7 | 99.7 | 99.7 | 99.7 | 99.7 | 99.7 |
| SiO2 | % | 0.05 | 0.05 | 0.05 | 0.03 | 0.05 | 0.05 | 0.05 |
| Na2O Total | % | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Fe2O3 | % | 0.03 | 0.03 | 0.03 | 0.02 | 0.03 | 0.03 | 0.03 |
| Specific Surface Area (BET) | m2/g | 5 | 3 | 4 | 3.5 | 4 | 3 | 3 |
| α-Al2O3-content | % | 96 | 96 | 96 | 96 | 96 | 96 | 96 |
| Median Grain Size | µm | 2 | 2 | 2 | 1.5 | 2 | 3 | 2 |
| Primary Crystal Size | µm | 0.5/2 | 0.5/2 | 0.5/2 | 0.5/2 | 0.5/2 | 0.5/2 | 0.5/2 |
| Ceramic Properties** | | | | | | | | |
| Specific Density | g/cm3 | 3.9 | 3.9 | 3.9 | Not Detected | 3.9 | 3.9 | 3.9 |
| Green Density*** | g/cm3 | 2.74 | Not Detected | 2.75 | Not Detected | Not Detected | Not Detected | Not Detected |
| Sintered Density | g/cm3 | 3.92 | Not Detected | 3.93 | Not Detected | Not Detected | Not Detected | Not Detected |
| Sintering Temperature | °C | 1725 | - | 1725 | - | - | - | - |
| Isotropic Linear Shrinkage | % | 13 | Not Detected | 12 | Not Detected | Not Detected | Not Detected | Not Detected |
*Material preheated to 1100°C
**Typical values
***Pressing moisture 4%, pressing strength 100 MPa uniax
****For sinter tests 0.1% MgO is added
