Electrical grade magnesium oxide powder

Electrical Grade Magnesium Oxide

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Your trusted electrical grade magnesium oxide manufacturer

Magking is a trusted manufacturer of heating element magnesium oxide powder in China since 1998. We specialize in high-quality MgO powder designed for heating elements, offering excellent thermal conductivity and insulation. Our products come in various grades to meet diverse industrial needs and ensure consistent performance. Contact us today for a free quote or more details about our heating element magnesium oxide powder.

High temperature grade magnesium oxide powder

Features: Purity above 99%, excellent thermal conductivity and insulation properties.
Applications: Ideal for high-performance heating elements in industrial heaters and high-temperature environments.

Medium temperature grade magnesium oxide powder

Features: Moderate purity, good thermal conductivity, and insulation, offering a cost-effective solution.
Applications: Commonly used in household appliances like electric kettles, ovens, and heating tubes.

Low temperature grade magnesium oxide powder

Features: Lower thermal conductivity, suitable for applications with less stringent heat transfer requirements.
Applications: Used in low-power heating elements or environmental temperature control devices.

Specialized MgO Powder

Features: Customizable formulations with additives to enhance specific properties, such as corrosion resistance or moisture adaptability.
Applications: Designed for specialized heating elements in demanding environments, such as corrosive or high-humidity conditions.

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Everything you need to know about magnesium oxide heating elements

Heating element magnesium oxide (MgO) powder is an essential material for electrical heating elements. It is used to provide excellent thermal conductivity and electrical insulation within the element, ensuring efficient heat transfer while maintaining safety. Its ease of application and adaptability make it a preferred choice for manufacturing reliable and durable heating elements.

However, MgO powder must be carefully chosen based on specific requirements such as purity, particle size, and thermal conductivity. Incorrect selection can lead to performance issues, such as reduced insulation or uneven heat distribution.

This article provides insights into heating element magnesium oxide powder, including its properties, tips for selecting the right type, a comparison of its advantages and limitations, and an overview of its classifications. For a deeper understanding of MgO powder and its applications, explore more in our blog post.

Advantages of magnesium oxide powder for heating elements

The magnesium oxide powder does not require additional compounds to enhance its core properties. Hence, no impurities affect the powder’s performance in insulation or heat conductivity when used in heating elements.

It only takes a precise amount of magnesium oxide powder to enhance the efficiency and durability of the heating element, making the application process straightforward.

This type of magnesium oxide powder is affordable yet delivers excellent performance over time. Various grades are available to meet different industrial needs, offering flexible solutions.

Magnesium oxide powder for heating elements is suitable for high temperatures and demanding environments. It can withstand intense heat up to 1200°C and offers excellent thermal conductivity and insulation properties.

Due to its consistent quality and fine powder structure, it is easy to handle and integrate into heating element production, reducing assembly time compared to other materials.

MAGKING magnesium oxide powder production equipment

Raw material: Light-burned magnesia

Capacity: 150,000 tons/year

Discharge fineness: D90<12μm; D50<5μm

Finished material and application: high-density and high-purity magnesium oxide

Equipment optimization processing to meet processing needs:
In view of the viscosity of magnesium oxide, we have carried out professional treatment and process optimization design for the equipment: the pipeline is sprayed with special substances, and the circulating air of the system is increased to reduce the viscosity of the material; Improve the clogging of the mill.

The raw materials are fed into the crushing chamber by quantitative feeding, and the materials are scattered to the periphery of the ring roller under the action of centrifugal force and fall into the raceway of the grinding ring to be crushed, rolled and ground by the grinding roller. After being crushed in the first layer, the material falls into the second and third layers, and after being crushed in the third layer, it is thrown out by the throwing disc, and is sucked into the classifier by the negative pressure of the induced draft fan. Coarse particles are sorted by a classifier and fall back for regrinding, while fine powder enters a cyclone collector or a bag filter to collect gas-solid separation with negative pressure airflow. The material is discharged from the discharge valve, and the air is purified by the dust collector and then discharged through the fan and muffler.

MAGKING production equipment advantages

High Purity
Magking’s MgO powder is highly pure, free of impurities, crucial for high-performance uses like heating elements.
Excellent Thermal Stability
Our MgO powder remains stable at high temperatures, perfect for heating elements, furnaces, and other heat-intensive applications.
Superior Insulation
It offers excellent insulation, reducing heat loss and boosting energy efficiency, especially in heating elements.
Customizable
We tailor particle size, purity, and other properties to meet the specific needs of various industries.
Consistent Quality
Each batch of our MgO powder is produced with consistent quality, ensuring reliable results in production processes.

MAGKING electrical grade magnesium oxide powder parameters

Chemical indicators

Specifications	Main chemical components%						Magnetic content ppm
Specifications	MgO	SiO2	CaO	Fe2O3	Al2O3	LOI	Magnetic content ppm
High temperature	≥97	≤1.5	≤1.0	≤0.4	≤0.9	≤0.04	≤30
Medium temperature	≥96.5	≤2	≤1.5	≤0.5	≤0.9	≤0.04	≤40
Low temperature	≥96	≤2.5	≤2	≤0.6	≤0.9	≤0.04	≤50

Physical indicators

Tap density T.D. (g/cm3)				Flow rate (F.R s/100g)
2.28--2.45				165±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

Test sample tube:
Material: SUS 304 L=700mm
Heating length: 680±10mm
Shrinkage tube: Φ8.0mm-Φ6.6mm
Heating wire: Ni80Cr20, Φ0.3mm
Heat treatment: 1050℃/15Min
Heating time: 15 minutes
Packaging: 25KG carton or woven bag packaging, or packaging according to customer requirements.

Safety and storage:
Electrical grade magnesium oxide powder is non-toxic and has trace dust. It is recommended to wear a mask and gloves during use. The product should be stored in a dry place. It is recommended to use it within 12 months after leaving the factory.

Special note on MAGKING electrical grade magnesium oxide powder series products:
Special high temperature electrical grade magnesium oxide H series products are special high temperature magnesium oxide products newly developed and produced by our company. After years of market launch, they have been unanimously recognized and praised by domestic and foreign high temperature electric heating pipe customers. It is suitable for the production of all air-fired electric heating elements below 1200 degrees high temperature, and can withstand high temperature heat treatment (such as 1050℃ annealing). The product is made of high-quality fused magnesia as raw material and processed by absorbing foreign advanced technology. Compared with domestic ordinary high-temperature electrical and magnesium oxide products, it has the following quality advantages:

1. Low magnetic content:
Most domestic manufacturers are between 200ppm and 600ppm, while our company’s special high-temperature electrical grade magnesium oxide H series products are ≤60ppm; lower magnetic content is conducive to improving the working life of electric heating tubes. According to formal experimental tests, the working life can be increased by more than 20%.

2. Lower moisture content (LOl):
That is, lower moisture content. Domestic ordinary products are generally ≥0.08%, or even higher (more than 0.1%), while the special high-temperature electrical grade magnesium oxide H series is only less than 0.04%. This index is conducive to the dehumidification of electric heating elements. For long tubes, it is easy to dehumidify and avoid tube expansion during heat treatment;

3. Lower hydration rate:
The lower the hydration rate of magnesium oxide, the lower the hygroscopicity of magnesium oxide, which makes the moisture absorption rate of magnesium oxide slower.

4. Lower sintering index:
The performance of the electric heating tube is that the degree of high-voltage decay is smaller when bending (compared with ordinary products), which is conducive to improving the compressive strength of electric heating elements.

5. No organic impurities:
It can avoid the carbonization and blackening of organic matter during heat treatment caused by organic impurities that may be entrained in magnesium oxide.

6. Better electrical performance:
In general, compared with products of the same level, this product has better electrical performance; when used on tubes longer than 2.5 meters, the test data is more effective, and the insulation resistance and compressive strength have increased significantly year-on-year.

7. This product has uniform color, beautiful appearance, and low dust, which is conducive to improving the on-site environment of powder addition.
The above data are typical electrical performance values of this series of electrical grade magnesium oxide powder, for users’ reference when selecting.

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