Overview
Ferrosoferric Oxide (Fe3O4), or magnetite, is a naturally occurring iron oxide with a spinel structure. It is a high-purity compound often synthesized for industrial applications due to its consistent quality. As a mixed-valence compound (Fe²⁺ and Fe³⁺), it exhibits unique magnetic and electrical properties, making it indispensable in advanced technologies. In B2B markets, '优级品' (high-grade) Fe3O4 is distinguished by its purity (typically ≥98%) and controlled particle size distribution. It is produced via precipitation or thermal decomposition methods, with strict quality control to meet sector-specific demands such as electronics or pharmaceuticals.
Physical and Chemical Properties
Fe3O4 is a black, crystalline solid with a density of 5.17 g/cm³ and a melting point of 1,597°C. It is insoluble in water but dissolves in acids, forming iron salts. Its ferromagnetism allows alignment under magnetic fields, a property leveraged in data storage and MRI contrast agents. The compound is thermally stable and exhibits high electrical conductivity compared to other iron oxides. However, it oxidizes to Fe2O3 (hematite) at elevated temperatures in the presence of oxygen, necessitating inert storage for long-term stability.
Main Applications
Ferrosoferric Oxide is widely used as a black pigment in coatings, plastics, and construction materials due to its UV resistance and opacity. In electronics, its magnetic properties are critical for manufacturing hard drives, sensors, and ferrofluids. The biomedical field employs nano-sized Fe3O4 for targeted drug delivery and hyperthermia cancer treatment. Additionally, it serves as a catalyst in ammonia synthesis and wastewater treatment, where its redox activity promotes pollutant degradation.
Safety and Storage
While Fe3O4 is generally low-toxicity, prolonged dust inhalation may cause respiratory irritation. Work areas should be well-ventilated, and PPE (masks, gloves) is recommended. The powder is non-flammable but may react exothermically with strong oxidizing agents. Storage requires airtight containers in dry conditions to prevent moisture absorption and oxidation. Bulk quantities should be palletized and kept away from acidic environments to preserve chemical integrity.
B2B Procurement Guide
Buyers should prioritize suppliers offering ISO-certified Fe3O4 with batch-specific Certificates of Analysis (CoA). Key parameters include purity (≥98%), particle size (e.g., 1–10 µm for pigments), and magnetic saturation values (e.g., 80–90 emu/g for electronics). Spot prices fluctuate with iron ore market trends; long-term contracts may secure stable rates. For niche applications (e.g., biomedical), request biocompatibility testing data. Logistics should ensure moisture-proof packaging, especially for sea freight.
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