FH-7 is medium-low temperature powder, mainly used in high quality elements of low wattage loading or liquid heating element.
Electrical grade magnesium oxide
Type FH-7
Characteristics
FH-7 is medium-low temperature powder, mainly used in high quality elements of low wattage loading or liquid heating elements. Elements stuffed with this material do not require annealing or sealing but with perfect moisture proof performance.
Chemical analysis (%)
MgO | CaO | Al2O3 | Fe2O3 | SiO2 |
≥93.0 | ≤2.5 | ≤0.9 | ≤0.8 | ≤2.5 |
Particle distribution
Mesh | +40 | +60 | +80 | +140 | +200 | +325 | -325 |
Dia(um) | +425 | +250 | +180 | +106 | +75 | +45 | -45 |
Quantity(%) | 0-1 | 24-38 | 16-28 | 18-30 | 7-13 | 5-11 | 0-8 |
Tap density
2.25-2.35g/cm3
Flow property
Ford cup no.3 (φ2.165mm-2.185mm): 160-240 s/100g
Ford cup no.4 (φ3.97mm-4.01mm): 34-40 s/100g
Packing
Packed in polypropylene plastic woven jumbo bags of declared approximately 25 kilograms .Special packing is available on requirement.
Security and storage
Electrical grade magnesium oxide is a non-toxic product, but with some dust. Masks and gloves are proposed to use during operation.
Electrical grade magnesium oxide should be stored in dry places, and are suggested to be used out within 12 months after delivery.
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