FH-F3
F series is moisture-proof and high-temperature resistant magnesium oxide. It is divided into three grades and models according to various electrical performance requirements. It is suitable for the production of different high-temperature air-fired electric heating elements. ℃ annealing), with strong moisture-proof ability, can be easily sealed, the heating element needs to be dried at 200℃-350℃/2-4 hours before sealing.
Applicable to: water heater pipes, oven pipes, mosquito coils and other medium power and medium and high rate load medium heaters.
Features and uses:
F series is moisture-proof and high-temperature resistant magnesium oxide. It is divided into three grades and models according to various electrical performance requirements. It is suitable for the production of different high-temperature air-fired electric heating elements. ℃ annealing), with strong moisture-proof ability, can be easily sealed, the heating element needs to be dried at 200℃-350℃/2-4 hours before sealing.
Applicable to: water heater pipes, oven pipes, mosquito coils and other medium power and medium and high rate load medium heaters.
Chemical indicators
| Specifications | Main chemical composition% | |||||
| MgO | SiO2 | CaO | Fe2O3 | Al2O3 | LOI | |
| FH-F1 | ≥97 | ≤1.5 | ≤1.0 | ≤0.4 | ≤0.9 | ≤0.15 |
| FH-F2 | ≥96.5 | ≤2 | ≤1.5 | ≤0.5 | ≤0.9 | ≤0.18 |
| FH-F3 | ≥96 | ≤2.5 | ≤2 | ≤0.6 | ≤0.9 | ≤0.20 |
Physical index
| Tap density T.D.（g/cm3） | Flow rate （F.R s/100g） | ||||||
| 2.28--2.45 | 175±20 | ||||||
| Mesh | +40 | +60 | +80 | +150 | +200 | +325 | -325 |
| Particle size (㎛) | +425 | +250 | +180 | +110 | +75 | +45 | -45 |
| Content(%) | ≤0.5 | 25±5 | 25±5 | 15±5 | 10±5 | 10±3 | 4±3 |
(If there are special requirements, it can be produced according to customer needs)
Electrical properties
| Specifications | Main electrical performance data reference table | |||||||||
| Normal | Thermal leakage current (mA) | Tidal state | ||||||||
| Insulation (MΩ) | Withstand voltage V/0.5mA | 4W/cm2 | 5W/cm2 | 6W/cm2 | 7W/cm2 | 8W/cm2 | 9W/cm2 | Insulation (MΩ) | Withstand voltage V/0.5mA | |
| FH-F1 | ≥2000 | ≥2500 | 0.02 | 0.03 | 0.04 | 0.08 | 0.15 | 0.23 | ≥2000 | ≥2500 |
| FH-F2 | ≥2000 | ≥2500 | 0.02 | 0.03 | 0.06 | 0.11 | 0.20 | 0.36 | ≥2000 | ≥2500 |
| FH-F3 | ≥2000 | ≥2500 | 0.02 | 0.04 | 0.08 | 0.15 | 0.26 | 0.46 | ≥2000 | ≥2500 |
Test Conditions:
Material: SuS 304 L=700mm
Heating length: 680±10mm
Shrinking tube: Φ8.0mm→6.6mm
Heating wire: Ni80Cr20, Φ0.3mm
Heating time: 5 minutes
Packing: 25KG carton or woven bag, or according to customer requirements.
Safety and Storage:
Electrical grade magnesium oxide powder is non-toxic and has a small amount of dust. It is recommended to wear masks and gloves during use. The product should be stored in a dry place and it is recommended to use it within 12 months after leaving the factory.
Moisture-proof and high-temperature resistant electrical grade magnesium oxide F series special instructions:
1) Strong moisture-proof ability:
At present, most of the high-temperature electrical grade magnesium oxide powders produced in the market are mostly moisture-proof only up to 1000MΩ, while the company's moisture-proof and high-temperature-resistant electrical grade magnesium oxide F series products have a moisture-proof ability greater than 2000MΩ. 50°) for a long time for more than 72 hours, the insulation has not decreased;
Strong moisture-proof ability can greatly improve the production cycle. To reduce the requirements for sealing materials, simply use ordinary silica gel for simple sealing.
2) Strong high temperature resistance:
The maximum operating temperature of this product can reach 800 degrees, which fills the shortcomings of high temperature powder without moisture resistance; products of different specifications and grades can be selected according to the technical indicators of electric heating elements.
3) The color of this product is uniform, beautiful, and the dust is small, which is conducive to improving the environment of the powder adding site.
The above data are the typical electrical performance values of this series of electrical grade magnesium oxide powder, which can be used for reference by users.
