Cobalt Powder

Updated: 2026-07-24

Overview

Cobalt powder is a finely divided form of cobalt metal, known for its high melting point, magnetic properties, and resistance to wear and corrosion. It is a critical material in industries such as aerospace, electronics, and energy storage. Produced through processes like hydrogen reduction or electrolysis, cobalt powder is available in various particle sizes and purity levels. Its versatility makes it indispensable for applications requiring durability and conductivity.

Physical and Chemical Properties

Cobalt powder exhibits a gray-black appearance and a density of 8.9 g/cm³. It has a high melting point of 1495°C and a boiling point of 2927°C, making it suitable for high-temperature applications. The powder is insoluble in water but dissolves in acids, forming cobalt salts. Its magnetic properties and hardness contribute to its use in alloys and permanent magnets. The particle size distribution and purity (typically ≥99.8%) are key quality indicators.

Main Applications

Cobalt powder is widely used in lithium-ion batteries as a component of cathodes, enhancing energy density and stability. It is also a key ingredient in superalloys for jet engines and gas turbines, where high-temperature resistance is crucial. Additionally, cobalt powder serves as a catalyst in petroleum refining and chemical synthesis. In the hard metal industry, it binds tungsten carbide particles to produce cutting tools and wear-resistant parts.

Safety and Storage

Cobalt powder poses health risks if inhaled, causing respiratory irritation or sensitization. Use NIOSH-approved respirators, gloves, and protective clothing when handling. Avoid contact with oxidizers and acids to prevent hazardous reactions. Store the powder in a cool, dry, well-ventilated area, sealed in airtight containers. Label packages clearly and comply with local regulations for hazardous materials transportation.

B2B Procurement Guide

When sourcing cobalt powder, prioritize suppliers with ISO certifications and traceable supply chains to ensure ethical and sustainable production. Verify purity (≥99.8% for most industrial uses) and particle size specifications. Request material safety data sheets (MSDS) and batch test reports. Bulk orders (e.g., 100+ kg) often qualify for discounts. Monitor market trends, as cobalt prices fluctuate due to demand from the battery and aerospace sectors.