Low Temperature MgO (Moisture-proof)

Category：Low Temperature Magnesium Oxide
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Release time：2026-09-07 09:08:20

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Product description

Low Temperature MgO (Moisture‑proof)

Low temperature magnesium oxide powder, with added silicone oil, offers a certain degree of moisture resistance. These products are mainly used in heating elements with relatively low working temperatures, such as heating elements for kettles, toasters, washing machines and electrical irons.

● Chemical Analysis (%)

Grade / Composition	MgO	CaO	Fe₂O₃	SiO₂	Al₂O₃	LOI
ZSM4A	≥95.0	≤2.0	≤0.8	≤1.5	≤1.0	≤0.3
ZSM4A‑550	≥93.0	≤3.5	≤0.8	≤3.0	≤1.0	≤0.3
ZSM4A‑540	≥93.0	≤3.5	≤0.8	≤3.0	≤1.0	≤0.3
ZSM1B‑2	≥95.0	≤2.0	≤0.8	≤1.5	≤1.0	≤0.3
ZSM5A	≥90.0	≤4.0	≤1.0	≤4.0	≤1.5	≤0.3

● Physical Properties

Grade	Flow Rate (s/100g)	Flow Time (s/100g)	Tap Density (g/cm³)
ZSM4A	150‑190	35‑45	2.22‑2.42
ZSM4A‑550	180‑220	35‑45	2.28‑2.40
ZSM4A‑540	150‑190	33‑43	2.28‑2.40
ZSM1B‑2	150‑190	33‑43	2.20‑2.40
ZSM5A	160‑200	33‑43	2.28‑2.40

● Particle Size Distribution (%)

Grade	+40	+60	+80	+140	+200	+325	-325
Particle Size(μm)	+425	+250	+180	+106	+75	+45	-45
ZSM4A	≤0.5	20‑40	10‑20	20‑40	10‑20	5‑15	0‑3
ZSM4A‑550	≤0.5	20‑40	10‑20	20‑40	10‑20	5‑15	0‑3
ZSM4A‑540	≤5.0	20‑40	10‑20	20‑40	10‑20	5‑15	0‑3
ZSM1B‑2	≤0.5	20‑40	10‑20	20‑40	10‑20	5‑15	0‑3
ZSM5A	≤0.5	20‑40	10‑20	20‑40	10‑20	5‑15	0‑5

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	3w/cm²	4w/cm²	5w/cm²	6w/cm²	Suggested Working Temp.
	Leakage Current Typical Value (mA)
ZSM4A	0.01	0.05	0.08	0.14	≤500℃
ZSM4A‑550	0.01	0.04	0.08	0.14	≤500℃
ZSM4A‑540	0.01	0.04	0.08	0.15	≤500℃
ZSM1B‑2	0.01	0.03	0.07	0.13	≤400℃
ZSM5A	0.05	0.15	0.45	/	≤300℃

● Test Conditions

1.Tube Material: SUS304, length of 430mm
2.Wire Material: Ni80Cr20, Φ0.25mm, spiral Φ2.5mm
3.Rolling: Φ10.0mm→Φ8.2mm
4.Effective Heating Length: 410‑440mm
5.Power on Time:20min
*The properties are the typical values and not the guaranteed values.

● Packaging

25kg in a woven bag or carton box. Special Package is available on requirements.

● Usage and Storage Instructions

1. This product series cannot withstand 1050℃ annealing.
2. Prior to sealing, 2‑3 hours of moisture removal at 200‑280℃ is recommended for heating elements.
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.

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