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White fused alumina FEPA F120-220 Grit is a high-purity, low-sodium α-alumina grain that is melted and crystallized with industrial alumina powder at high temperatures and then crushed. It is a particle with closely controlled particle size distribution and uniform appearance. Performance: white, α crystals over 99%, high purity, high hardness. Strong cutting force and good chemical stability. The European FEPA (Federation of European Producers of Abrasives) is an applied particle size specification for abrasives and refractory materials. The particle size numbers are: F120, F150, F180, F220, F220.
Introduce of FEPA F120-220 white fused alumina grit:
White fused alumina is an aluminium oxide material created using the same process as brown fused alumina, except that higher purity alumina is used in the composition. The final product is a purer aluminium oxide used in a speciality process. White aluminium oxide contains virtually no iron content making it a safe material for applications that require minimal foreign contamination.
Physical Properties of FEPA F120-220 white fused alumina grit:
| Melting point(℃) | 2250 | |
| Bulk density(g/cm3) | 1.80~1.95 | |
| Mohs Hardness | 9.0min | |
| Whiteness | 85min | |
| Size | 120, 150, 180, 220 | |
Chemical Composite of FEPA F120-220 white fused alumina grit:
| Items | WAS | WAN |
| Al2O3 | 99.5%min | 99.70%min |
| SiO2 | 0.10%max | 0.10%max |
| Fe2O3 | 0.10%max | 0.08%max |
| Na2O | 0.30%max | 0.10%max |
Particle Distribution of FEPA F120-220 white fused alumina grit:
| FEPA SIZE | Average grain size(μm) |
| F 120 | 90 – 125 |
| F150 | 63 – 106 |
| F 180 | 53 – 90 |
| F 220 | 45 – 75 |
The description of the grain shape can range from “angular” to “acicular” to “spherical”. When the value of the dimensionless form factor is 1, the grain is spherical. The smaller the form factor, the pointier the grain.
Commonly referred to as “grit”, this number designation is determined by the amount of abrasive mineral that can pass through a mesh screen with specific size openings. Therefore, a 40 grit abrasive particle will pass through a mesh screen that has 40 openings in one linear inch. Consequently, the higher
The specific weight is the ratio of the weight of a body to its volume. The specific weight of corundum under normal conditions is 3.94 g/cm3.
The refractive index of fused alumina is approx. 1.76, whereas that of normal glass types is approx. 1.4. The closer the refractive indices are to each other, the more transparent the system (e.g. varnishes).
Moisture contamination is the number one reason customers call Technical Support. Fortunately, it is usually preventable. There are 4 key ways to keep your abrasive free of moisture:1.Store abrasive properly and always make sure bottles are tightly closed when not in use.2.Keep abrasive in a cool dry location with minimum
This decision is made by knowing the type of material you will be working with. Open Coat – Here, the abrasive granules cover from 50% – 70% of the backing and are set at pre-determined spacing to reduce loading. Used on softer surface materials that tends to load or fill
Over the past 18 years, TAOANG products range from raw material bauxite to processing follow-up products brown fused alumina, finishing white fused alumina and dense fused alumina, bubble alumina, and fused alumina micro powder. The production process is
Over the past 18 years, TAOANG products range from raw material bauxite to processing follow-up products brown fused alumina, finishing white fused alumina and dense fused alumina, bubble alumina, and fused alumina micro powder. The production process is
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Raw materials containing aluminium oxide are electrothermally melted at a reaction temperature of more than 2,000 °C to produce the various fused aluminas. Different starting materials are used depending on the desired type of fused alumina. For instance,
