High Purity Pure Nickel Granules

High purity pure nickel granules are a high-purity metallic material that holds significant importance in modern industrial and scientific research fields due to their outstanding physical, chemical, and mechanical properties.

High purity pure nickel granules refer to granular materials composed primarily of metallic nickel (Ni) with extremely low total impurity content.

Industrially, it is usually classified according to purity:

1. Industrial-grade nickel: Ni ≥ 99.0% (e.g., 99.2%, 99.5%), with impurities including Fe, Cu, S, C, etc., used for conventional electroplating and metallurgical alloys;
2. High-purity nickel (4N): Ni ≥ 99.99%, suitable for electronic coating and catalysts;
3. Ultra-high-purity nickel (5N): Ni ≥ 99.999%, with impurities controlled at ppm/ppb levels, used in semiconductors, aerospace high-end target materials, and precision alloys.

Appearance: Silver-white with metallic luster. Shapes include spherical, irregular granules, and cylindrical particles. Typical sizes range from tens of micrometers to several millimeters (e.g., 3×3 mm, 6×6 mm cylindrical particles; atomized spherical particles typically 15–45 μm).

High purity pure nickel granules come in various forms depending on their application:

• ‌Cubic particles: Convenient for storage and transportation, suitable for laboratory weighing and small-batch use. 
• ‌Spherical/near-spherical particles: Excellent flowability, ideal for automated feeding, additive manufacturing, and battery electrode coating.
• Particle size range: Typically 1–30 mm, precisely graded via sieving to meet specific process requirements.

Classified by sizes:

1. Cylindrical particles (mainstream for coating/smelting)

Φ3×3 mm                         Φ3×5 mm

Φ4×4 mm                         Φ5×5 mm

Φ6×6 mm

2. Irregular particles

1～3 mm                          2～5 mm

3～8 mm                          5～15 mm

1. Fundamental Physical Parameters: Atomic weight 58.69; Density 8.902 g/cm³; Melting point 1453°C, Boiling point 2732°C; Face-centered cubic crystal structure at room temperature, exhibiting ferromagnetism (Curie temperature 354°C); Electrical resistivity approximately 6.84 μΩ・cm (20°C); Thermal conductivity: 90.9 W/(m·K);
2. Chemical Stability: Resistant to atmospheric, fresh water, and weak alkali corrosion at room temperature; slowly dissolves in non-oxidizing acids; strong oxidizing acids (concentrated nitric acid) can passivate it; readily oxidizes to NiO at high temperatures; dissolves in dilute nitric acid to form a green nickel ion solution;
3. Mechanical Properties: Industrial-grade pure nickel exhibits a room-temperature yield strength ≥ 240 MPa, tensile strength ≥ 520 MPa, and elongation ≥ 45%. It possesses excellent plasticity and is suitable for cold working. High-purity particles, characterized by minimal impurities and uniform grain structure, demonstrate superior weldability and sinterability.

1. Electronics and Semiconductors: Evaporation/sputtering coating target materials, thick-film circuit pastes, connector plating; 5N-grade particles for chip packaging and integrated circuits;
2. Catalysis and Chemical Engineering: Hydrogenation reaction catalysts (e.g., nickel framework/Raney nickel), petrochemical desulfurization catalysts;
3. New Energy Batteries: Nickel-metal hydride battery cathodes, precursor materials for lithium-ion ternary cathodes (NCM/NCA);
4. Powder Metallurgy & Additive Manufacturing: 3D-printed pure nickel/nickel-based alloy components for aerospace lightweight parts;
5. Electroplating and metallurgy: Electroplating anode materials, nickel additives for stainless steel and high-temperature alloys (e.g., Inconel 718);
6. Magnetic materials: Production of soft magnetic alloys and electromagnetic shielding components.

• High Corrosion Resistance: Exhibits strong stability at room temperature against water, air, alkaline environments, and various acids (such as dilute sulfuric acid and hydrochloric acid). Its surface readily forms a dense oxide film that prevents further corrosion.
• Excellent High-Temperature Stability: With a melting point as high as 1455°C, it maintains structural integrity even in high-temperature oxidizing atmospheres, making it suitable for high-temperature alloy manufacturing.
• Magnetic Properties: Nickel is one of the few ferromagnetic metals, with a Curie point of 357.6°C. It finds extensive applications in electronic and magnetic materials.
• High Workability: Easily processed into various forms-such as powder, sheets, or granules-through methods like rolling, forging, and wire drawing.

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