Special High Temperature MgO for Cartridge Heater G1
● Features
G1 is a special high temperature electrical grade MgO powder, mainly used in cartridge heaters. The insulation resistance under heating condition can be more than 2MΩ, and the leakage current is less than 0.17mA.
● Chemical Analysis
| Composition | MgO | CaO | Fe2O3 | Al2O3 | SiO2 |
| Value (%) | ≥97.5 | ≤0.9 | ≤0.45 | ≤0.9 | ≤3.5 |
● Physical Properties
| Flow Rate | Tap Density | Particle Size Distribution |
| 155±15s/100g | 2.27～2.37g/cm3 | 70～325 |
● Particle Size Distribution
| Mesh | +60 | +70 | +80 | +100 | +150 | +200 | +325 | -325 |
| Particle Size (μm) | +280 | +224 | +180 | +154 | +100 | +71 | +46 | -46 |
| Value (%) | 0～3 | 10～20 | 20～35 | 5～15 | 25～35 | 10～20 | 2～9 | 0～3 |
● Electrical Properties
● Test Condition
Material: SUS304
Rolling: ɸ8.0mm→ɸ6.6mm
Length: 450mm
Surface Loading: 7W/c㎡
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 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.
