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Commonly Used In Steel Smelting Casting Furnace Lining Flame Equipment Magnesium Oxide (MgO)

Product Introduction

Magnesium oxide (MgO, CAS 1309‑48‑4) is a white, hygroscopic mineral powder produced by calcining magnesite. It has a molecular weight of 40.30, a melting point of 2852 °C, and a pH of 10.3 in saturated solution. It is widely used in refractories, electrical insulation, agriculture, water treatment, dietary supplements, and chemical processing.

Parameters (Table)

Product Features

• High thermal stability – melts at 2852 °C, usable above 2000 °C.

• Excellent electrical insulator – wide bandgap (7.8 eV), dielectric constant 9.6.

• Buffered alkalinity – pH naturally capped at 10.3, avoids over‑alkalisation.

• High Mg content – ~60% elemental magnesium, 3.75× more than citrate.

• Two physical forms – light (fluffy) and heavy (dense) for different processing needs.

• Non‑toxic & eco‑friendly – safe for food, feed, and pharmaceutical use.

Product Advantages

• Cost‑efficient – highest Mg content per gram reduces material costs significantly.

• Superior heat resistance – withstands extreme temperatures with low thermal expansion.

• Safe pH control – gradual neutralisation protects equipment and tissues.

• Versatile – serves refractories, pharma, agriculture, insulation, and catalysis.

• Regulatory ready – available in USP/FCC/EP grades with Kosher/Halal options.

• Improved formulation – light grade gives excellent flowability; heavy grade reduces capsule size.

Applications

• Refractories – linings for furnaces, kilns, crucibles.

• Dietary supplements & healthcare – antacids, laxatives, tablet excipients (light grade).

• Agriculture – soil pH correction, magnesium fertilizer, animal feed additive.

• Water & wastewater – acid neutralisation, heavy metal precipitation, phosphate removal.

• Electrical insulation – filler in mineral‑insulated cables and heating elements.

• Construction – magnesium oxychloride cements, fireproof boards.

• Catalysis & adsorption – catalyst support and CO₂ capture.

Technical

• Production – calcination of magnesite or Mg(OH)₂ at 400–1000 °C (light grade) or >1000 °C (heavy grade).

• Grades – purity from 85 % (industrial) to 99.99 % (high‑purity 4N); light (bulk density ≤0.15 g/mL) and heavy (≥0.25 g/mL).

• Key parameters – MgO content, loss on ignition, particle size distribution, specific surface area, and acid‑neutralising capacity.

• Standards – compliant with USP, FCC, EP, and other national pharmacopoeias where applicable.

Principle (Mechanism of Action)

• Buffered alkalinity – MgO hydrolyses slowly in water to Mg(OH)₂, releasing OH⁻ ions but capping pH at ≈10.3, avoiding sudden over‑alkalisation.

• Thermal resistance – ionic crystal structure with very high melting point (2852 °C) and low thermal expansion, providing exceptional heat endurance.

• Adsorption & reactivity – porous surface (especially light grade) enables physical adsorption of impurities and chemical reaction with acidic species.

• Cementitious reaction – reacts with MgCl₂ or MgSO₄ to form strong, fire‑resistant oxychloride/sulphate cements.

Services

• Customisation – particle size, bulk density, purity level, and packaging (bags, big bags, drums) tailored to client needs.

• Technical support – formulation advice, processing optimisation, and application troubleshooting.

• Sample service – free or small‑charge samples for qualification trials.

• Documentation – full COA, SDS, and regulatory certificates (Kosher, Halal, GMP) provided.

• Logistics – global shipping with proper handling and storage guidance.

• After‑sales – quality feedback, continuous improvement, and dedicated account management.