Ultra-High Temperature MgO (WithoutWith Light Silicone)

Category：Ultra‑High Temperature Magnesium Oxide
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Release time：2026-09-07 16:12:13

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Product description

Ultra‑High Temperature MgO (Without/With Light Silicone)

The ultra‑high temperature magnesium oxide powder is not silicone coated or coated with light silicone. This series of MgO undergoes a secondary high temperature treatment and is manufactured via specialized process, which delivers outstanding electrical properties.

It is mainly applied to electric heating elements requiring ultra‑high power or ultra‑high working temperatures, such as high‑power cartridge heaters, explosion proof heaters, molten salt heaters and heaters operating in other hazardous areas.

● Chemical Analysis (%)

Grade / Composition	MgO	CaO	Fe₂O₃	SiO₂	Al₂O₃	LOI
M1	≥99.0	≤0.5	≤0.2	≤0.2	≤0.2	≤0.2
M1‑80	≥99.0	≤0.5	≤0.2	≤0.2	≤0.2	≤0.2
G1	≥98.0	≤1.0	≤0.45	≤1.0	≤0.2	≤0.2
G1‑80	≥98.0	≤1.0	≤0.45	≤1.0	≤0.2	≤0.2
M2	≥97.0	≤1.5	≤0.2	≤1.0	≤0.5	≤0.2
M2‑80	≥97.0	≤1.5	≤0.2	≤1.0	≤0.5	≤0.2

● Physical Properties

Grade	Flow Rate (s/100g)	Flow Time (s/100g)	Tap Density (g/cm³)
M1/G1	130‑170	28‑40	2.30‑2.50
M2/M1‑80/G1‑80/M2‑80	130‑170	30‑40	2.30‑2.45

● Particle Size Distribution (%)

Mesh	+40	+60	+80	+140	+200	+325	-325
Particle Size(μm)	+425	+250	+180	+106	+75	+45	-45
M1/G1/M2	≤0.5	25‑37	10‑22	20‑32	6‑16	5‑15	0‑10
M1‑80/G1‑80/M2‑80	0	0‑3	15‑30	40‑50	10‑20	5‑15	0‑10

Note: The +425 μm and -45 μm particles is strictly controlled within standard limits. To ensure tap density and flow rate, the content of other particle sizes may exceed the aforementioned range. (Customization available upon request for special requirements.)

● Electrical Properties

Grade / Surface Loading	8w/cm²	9w/cm²	10w/cm²	11w/cm²	Suggested Working Temp.
	Leakage Current Typical Value (mA)
M1	0.01	0.05	0.12	0.20	≤1200℃
M1‑80	0.01	0.05	0.12	0.21	≤1200℃
G1	0.01	0.06	0.15	0.25	≤1100℃
G1‑80	0.01	0.06	0.16	0.27	≤1100℃
M2	0.01	0.05	0.13	/	≤1000℃
M2‑80	0.01	0.05	0.14	/	≤1000℃

● Test Conditions

1.Tube Material: SUS304, length of 430mm
2.Wire Material: Ni80Cr20, Φ0.25mm, spiral Φ2.5mm
3.Rolling: Φ8.0mm→Φ6.6mm
4.Effective Heating Length: 410‑440mm
5.Power on Time:20min
*The properties are the typical values and not the guaranteed values.

● Packaging

M1/G1/M2:25kg in a woven bag or carton box. Special Package is available on requirements.
M1‑80/G1‑80/M2‑80:5kg in a plastic bag. Special Package is available on requirements.

● Usage and Storage Instructions

1. Ultra‑High Temperature Magnesium Oxide is treated without silicone or treated with light silicone.
2. The heating elements require 1050℃ annealing for 20‑30 minutes and immediate sealing after annealing is required.
3. Electrical grade MgO powder is non‑toxic, but with some dust. It is recommended to wear anti‑dust respirators and gloves during operation.

4. Electrical‑grade magnesium oxide powder should be stored in a well‑ventilated, dry area away from direct sunlight. It is recommended to use the product within 12 months after delivery, and once opened, the material should be consumed on the day of opening.

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