Heatecx Limited
MgO-MidTemp Magnesium Oxide (MgO) Powder is a versatile electrical grade magnesium oxide designed to meet the needs of a wide range of electric heating elements. This Magnesium Oxide is distinguished by its ability to offer consistent performance at moderate operating temperatures, making it a key component for the efficiency and safety of heating elements. Its special formulation ensures adequate MgO dielectric strength and optimal thermal conductivity in heating elements, contributing to uniform heat distribution and extended heater lifespan.
MgO-MidTemp Magnesium Oxide Powder is an optimized solution for manufacturing heating elements that operate in medium temperature ranges. This electrical grade Magnesium Oxide offers an ideal balance between MgO dielectric strength, thermal conductivity in heating elements, and economic efficiency. As a medium-temperature MgO powder, it has been formulated to provide reliable electrical insulation and efficient heat transfer, crucial for the durability and performance of heating elements. Its composition ensures excellent fluidity, facilitating the filling process in the production of electric heating elements. MgO-MidTemp is the smart choice for applications requiring solid performance without the extreme demands of high-temperature materials, guaranteeing electrical safety in heaters for common use.
MgO-MidTemp Magnesium Oxide (MgO) Powder is a versatile Magnesium Oxide powder designed to meet the needs of a wide range of electric heating elements. This Magnesium Oxide is distinguished by its ability to offer consistent performance at moderate operating temperatures, being a key component for the efficiency and safety of heating elements. Its special formulation guarantees adequate MgO dielectric strength and optimal thermal conductivity in heating elements, contributing to uniform heat distribution and extended heater lifespan. MgO-MidTemp is the ideal medium-temperature MgO powder for manufacturers seeking a reliable and easy-to-process material that complies with quality and safety standards in the production of general-purpose electric heating elements.
MgO-MidTemp Magnesium Oxide Powder is widely used in the manufacturing of electric heating elements for medium-temperature applications. Its main uses include:
• Domestic and Industrial Water Heaters: Ideal for heating elements in electric water heaters, boilers, and water heaters, where good thermal conductivity in heating elements and stable MgO dielectric strength at temperatures up to 800°C are required.
• Air Heaters and Fan Heaters: Used in heating elements for ambient heating systems, hand dryers, and small appliances operating at moderate temperatures.
• Hot Plates and Electric Stoves: Suitable for heating elements in electric cooktops, irons, and other cooking appliances that require efficient heat transfer and safe insulation.
• Defrost Heaters for Refrigerators: In heating elements used for defrosting refrigeration and freezing systems, where moisture resistance and stability at medium temperatures are important.
• Heating Elements for Small Appliances: Widely used in toasters, coffee makers, and other home appliances that require reliable and safe heating elements.
MgO-MidTemp Magnesium Oxide Powder offers significant features and advantages:
• Controlled Purity: MgO content exceeding 94%, ensuring good MgO dielectric strength and stability in the medium temperature range.
• Optimal Temperature Range: Designed for efficient performance in applications with operating temperatures up to 800°C, positioning it as an excellent medium-temperature MgO powder.
• Good Thermal Conductivity: Facilitates effective heat transfer, contributing to energy efficiency and temperature uniformity in electric heating elements.
• Reliable Electrical Insulation: Provides adequate MgO dielectric strength to prevent current leakage and ensure safety in the operation of heating elements.
• Consistent Flow Properties: Its particle size distribution and shape are optimized for uniform filling in automatic machines, improving production efficiency and the quality of the final product.
• Improved Moisture Resistance: While not its primary characteristic, this series exhibits superior moisture resistance, making it more suitable for environments where moderate moisture exposure is a concern.
|
Characteristic |
HX-L9 |
HX-L8 |
HX-L7 |
HX-L6 |
|
Chemical Analysis (%) |
||||
|
MgO |
≥97 |
≥96.5 |
≥95 |
≥94 |
|
CaO |
≤1.0 |
≤1.5 |
≤2.0 |
≤2.5 |
|
Al2O3 |
≤0.9 |
≤0.9 |
≤0.9 |
≤0.9 |
|
Fe2O3 |
≤0.5 |
≤0.5 |
≤0.6 |
≤0.7 |
|
SiO2 |
≤1.5 |
≤2.0 |
≤2.5 |
≤3.0 |
|
L.O.I |
≤0.15 |
≤0.15 |
≤0.20 |
≤0.25 |
|
Physical Properties |
||||
|
Flow Time (s/100g) |
40±6 |
40±6 |
40±6 |
40±6 |
|
Flow Rate (s/100g) |
175±25 |
175±25 |
175±25 |
175±25 |
|
Bulk Density (g/cm³) |
2.30-2.45 |
2.30-2.45 |
2.25-2.45 |
2.25-2.45 |
|
Electrical Properties (Cold Condition) |
||||
|
Characteristic |
Value (All grades) |
|||
|
Insulation Resistance (MΩ) |
≥2000 |
|||
|
Withstand Voltage (V/1mA) |
≥2500 |
|||
|
Electrical Properties (Heating Condition) |
||||
|
Characteristic |
HX-L9 |
HX-L8 |
HX-L7 |
HX-L6 |
|
Power Load (W/cm²) |
9 |
9 |
9 |
8 |
|
Leakage Current (mA) |
≤0.22 |
≤0.35 |
≤0.45 |
≤0.35 |
|
Withstand Voltage (V/1mA) |
≥1800 |
≥1800 |
≥1800 |
≥1800 |
|
Referenced Working Temperature |
||||
|
Grade |
Temperature (°C) |
|||
|
HX-L9 |
≤800 |
|||
|
HX-L8 |
≤750 |
|||
|
HX-L7 |
≤600 |
|||
|
HX-L6 |
≤450 |
MgO-MidTemp Magnesium Oxide Powder, as a medium-temperature MgO powder, requires proper handling to maintain its optimal properties and ensure electrical safety in heaters.
• Storage: Store in a cool, dry place, in its original sealed packaging, to minimize moisture absorption. Prolonged exposure can affect MgO dielectric strength and thermal conductivity in heating elements. Environmental humidity control below 60% and temperatures between 15-25°C are recommended.
• Transportation: Transport in closed containers to protect from moisture, contamination, and physical damage. Avoid excessive vibrations that could alter bulk density.
• Usage: It is essential to ensure that the Magnesium Oxide powder is dry before use. If moisture absorption is suspected, an annealing process (baking) is necessary to restore its insulating properties. This step is crucial to guarantee MgO dielectric strength and heater efficiency. Use personal protective equipment (gloves, mask) to avoid dust inhalation.
• Annealing: For moisture-sensitive applications, or if the powder has been exposed, annealing at appropriate temperatures before filling and sealing the heating element is vital to eliminate moisture and optimize the performance of Magnesium Oxide for electric heating elements.
• Automatic Filling Machines: The flow properties of MgO-MidTemp are consistent, facilitating its use in automatic tubular heater filling machines. It is important to calibrate the machine to achieve uniform compaction density, which directly influences thermal conductivity in heating elements and the lifespan of the heating element.
• Specific Considerations: For heating elements operating in the 600-800°C range, HX-L9 and HX-L8 grades are the most suitable due to their higher purity and stability. Monitoring MgO dielectric strength during manufacturing is key to ensuring the final product's quality and electrical safety in heaters.
Annealing Magnesium Oxide (MgO) Powder, including medium-temperature MgO powder like MgO-MidTemp, is primarily necessary when the material has absorbed moisture. Moisture severely compromises MgO dielectric strength, which can lead to electrical failures in heating elements. Therefore, if the powder has been exposed to a humid environment during storage or transport, or if an increase in leakage current is detected during initial tests, an annealing process is indispensable. This process, which involves heating the MgO to a controlled temperature, eliminates moisture and restores its optimal insulating properties, ensuring the safety and performance of electric heating elements.
