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Special High Temperature MgO for High Power Cartridge Heater G1-1(Marine Magnesium)

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Features

G1-1 is mainly used for high-power cartridge heaters. The raw material is fused magnesium using the magnesite derived from seawater with chemical methods and fired at 2700°C. It has low SiO2 and extremely high heat resistance and slag resistance.

This kind of MgO powder has MgO ⩾99%, extremely low Fe2O3, higher whiteness, and good electrical properties. It can be applied in cartridge heaters with surface loading ⩽10W/cm2, and the leakage current is less than 0.2mA.


Chemical Analysis

CompositionMgOCaOFe2O3Al2O3SiO2
Value (%)≥99.0≤0.5≤0.2≤0.1≤0.5


Physical Properties

Flow RateTap DensityParticle Size Distribution
155±15s/100g2.27~2.38g/cm360~325


Particle Size Distribution

Mesh+60+80+150+200+250+325-325
Particle Size (μm)+280+180+100+71+55+46-46
Value (%)8~2028~3826~3610~202~81~60~5


Electrical Properties

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Test Condition

Material: SUS304

Rolling: ɸ8.0mm→ɸ6.6mm

Length: 450mm

Surface Loading: 7W/cm2

Power on Time:20min

*The properties are the typical values and not the guaranteed values.


Packaging

5Kg in a woven bag. Special Package is available on requirements.


Remarks

1. G1-1 is treated without silicone or treated with pretty light silicon oil.

2. Electrical grade MgO powder is non-toxic, but with some dust. It is recommended to wear anti-dust respirators and gloves during operation. 

3. The elements can stand 1050℃ annealing for 15-30 minutes and requires immediate sealing.

4. Electrical grade MgO powder should be stored in dry places, and best used within 6 months after delivery.