Fused Magnesia

CAS No.:	1309-48-4
Linear Formula:	MgO
Material:	Magnesium Oxide
Condition:	Fused
Purity:	99% - 99.999%
Appearance:	Powder or lumps

 

✅ Product Description
Fused Magnesia is a high-purity form of magnesium oxide (MgO) produced by melting high-grade magnesium ore in an electric arc furnace at temperatures exceeding 3,000°C. This process yields a dense, crystalline material with exceptional thermal resistance, electrical insulation, and chemical stability. Available in powder or lump form, Fused Magnesia is widely used in refractory materials, ceramics, electrical insulation, and metallurgy.

Its superior grain structure and low impurity content make it ideal for high-temperature and corrosive environments, such as electric arc furnaces, steelmaking, and high-performance crucibles. Grades with purities from 99% to 99.999% are available to meet a range of industrial and scientific requirements.

 

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🔹 Features & Properties

Purity grades: 99%, 99.9%, 99.99%, 99.999%

Appearance: White to off-white powder or crystalline lumps

Melting point: ~2,800°C

High thermal conductivity and dielectric strength

Excellent chemical inertness and corrosion resistance

High bulk density and low porosity

 

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🚀 Applications & Related Industries

✅ Refractories for electric arc furnaces, induction furnaces, and ladles

✅ Crucibles and high-temperature ceramics

✅ Insulation material in heaters, thermocouples, and ignition systems

✅ Catalyst and catalyst support in chemical processing

✅ Metallurgical flux and sintering aids

✅ Polishing compounds and electrical ceramics

 

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📖 Synonyms

Electro-fused Magnesia

Fused Magnesium Oxide

High-Purity MgO

Crystalline Magnesia

 

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⚠ Health & Safety Information

Low toxicity but may cause irritation on inhalation

Avoid generating airborne dust

Use protective gloves and goggles during handling

Store in cool, dry conditions in tightly sealed containers

 

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🏭 Production Method & Equipment
Fused Magnesia is produced by fusing magnesite or synthetic magnesium hydroxide in an electric arc furnace. The melt is then cooled, crushed, and sized. Depending on application, it may undergo additional purification processes such as vacuum sintering, acid washing, or grinding to precise particle sizes.

 

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📐 Size & Customization

Lump size: 10–100 mm (customizable)

Powder particle size: -100 mesh, -200 mesh, -325 mesh, or <5 µm

Custom packaging and sizing available upon request

 

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📋 Certifications & Quality Assurance

Conforms to ASTM, JIS, GB, EN, and BS standards

Full traceability and Certificate of Analysis (COA) provided

High-purity grades tested by ICP-MS or XRF

RoHS and REACH compliant

 

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⏱ Lead Time & MOQ

Standard lead time: 10–15 working days

Minimum Order Quantity: 5 kg (powder), 10 kg (lumps)

 

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💬 FAQs (Frequently Asked Questions)
Q1: What's the difference between fused and dead burned magnesia?
A1: Fused magnesia has a denser, crystalline structure and higher purity, while dead burned magnesia is sintered and more porous. Fused is preferred in severe high-temp environments.

Q2: Can Fused Magnesia be used for electrical insulation?
A2: Yes, especially in high-purity form, it offers excellent electrical insulation at elevated temperatures.

Q3: How is particle size controlled?
A3: Particle size is controlled through precision grinding and classified by mesh or micron standards depending on your request.

 

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🧭 How to Choose the Product

Use lump form for refractory linings and crucibles

Choose fine powder for electrical insulation and chemical applications

Select ultra-high purity (99.999%) for electronics and optical materials

 

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📏 Product Standards

Conforms to ASTM, JIS, GB, EN, and BS standards

Other standards or custom specs available upon request

 

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🧪 Production & Quality Control
Every batch is tested for chemical composition, particle size, bulk density, and impurity content using XRF, ICP-MS, and SEM analysis. Consistency and quality are maintained through strict furnace operation protocols and post-processing checks.

 

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📦 Shipping & Delivery Information

Standard packing: Double-layer anti-moisture bags, fiber drums, or steel drums

Available in 5 kg, 25 kg, or bulk packaging

Safe for international transport with MSDS and COA

 

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🌱 Environmental Impact & Sustainability

Non-toxic, recyclable, and environmentally inert

Manufactured in compliance with environmental safety protocols

No harmful emissions during standard use

 

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🧼 Maintenance & Care Instructions

Store in dry, moisture-free areas

Keep packaging sealed to prevent absorption of moisture

Avoid contamination from reactive chemicals during storage

 

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🧩 Differentiation Between Products
Fused Magnesia is denser and purer than sintered (dead burned) magnesia, offering superior performance in high-stress environments. It is ideal for applications requiring extreme thermal and chemical resistance.

 

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📩 Contact Us
For technical guidance, quotations, or customization inquiries, feel free to reach out to our experts for tailored support.

 

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Fused Magnesia Specification

Item	MgO %	GaO %	Fe %	Mn %
Spec	≥99.5	≤0.08	≤0.007	≤0.003

Chemical Identifiers

Linear Formula	MgO
MDL Number	MFCD00011109
EC No.	215-171-9
Beilstein/Reaxys No.	N/A
Pubchem CID	14792
IUPAC Name	oxomagnesium
SMILES	O=[Mg]
InchI Identifier	InChI=1S/Mg.O
InchI Key	CPLXHLVBOLITMK-UHFFFAOYSA-N

Magnesium Oxide Properties (Theoretical)

Compound Formula	MgO
Molecular Weight	40.3
Appearance	White Powder
Melting Point	2,852° C (5,166° F)
Boiling Point	3,600° C (6,512° F)
Density	3.58 g/cm3
Solubility in H2O	N/A
Exact Mass	39.98
Monoisotopic Mass	39.98

 

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