MgO Powder
Electrical grade magnesium oxide (MGO) powder is made from fused magnesite and coted with silicone resin to have good anti-moisture property. It’s used in electric heating elements as heat-conduction material. We have low-temperature grade (max. W.T. 500℃), middle-temperature grade (max. W.T. 700℃), middle-high-temperature grade (max. W.T. 900℃) and high-temperature grade (max. W.T. 1000℃) to meet various needs from customers.
Typical technical data of middle-temperature grade.
Chemical composition (%)
MgO | CaO | Al2O3 | Fe2O3 | SiO2 | LOI |
≥97 | ＜1.20 | ＜1.0 | ≤0.42 | ≥1.50 | 0.30 |
Mesh distribution (According to ASTMD 2272-97 Standard )
Mesh | +40M | +60M | +80M | +140M | +200M | +325M | -325M |
Particle size（mm） | 0.425 | 0.250 | 0.180 | 0.106 | 0.075 | 0.045 | -0.045 |
content（%） | 0-0.2 | 25-35 | 15-25 | 24-35 | 10-18 | 8-15 | 3-6 |
Tap density and flow rate (According to ASTMD-3347-97 Standard)
Tap density | Flow rate |
2.36-2.40g/cm3 | 150-180s/100g |
Electrical property
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Besides electrical grade MGO powder for electric heating elements, we are also supplying MGO powder for flexible/rigid fireproof cables.
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