Silicon nitride ball

grindingminiatureprecision

Product overview
Precision silicon nitride (Si3N4) grinding balls offer a combination of high strength, excellent wear and corrosion resistance, electrical insulation and non-magnetic behavior. Their low density and thermal stability make them suitable for demanding milling and dispersion processes in industrial and laboratory environments.

Silicon nitride grinding ball features

• High hardness and long service life
• High temperature resistance — maintains strength and hardness up to 1200℃
• Low density with high densification
• Self-lubricating surface; corrosion and rust resistant
• Low coefficient of thermal expansion and high thermal shock resistance
• Chemical resistance in acidic and alkaline environments
• Non-magnetic and electrically insulating
• Minimal adhesion or reaction with metals at elevated temperatures

Applications

• Grinding media for ball mills, stirrer mills and vibration mills in laboratories and production lines
• Crushing, grinding and dispersing ceramic powders, magnetic materials, non-metallic minerals and pyrotechnic materials
• Ultra-fine dispersion where high product purity and particle-size control are required

Precision grades and typical parameters

• G3 — Roundness ΔRSw max. 0.08; Diameter tolerance VDws 0.08; Surface roughness Ra max. 0.01; Within-batch diameter tolerance VDwl max. 0.13
• G5 — Roundness ΔRSw max. 0.13; Diameter tolerance VDws 0.13; Surface roughness Ra max. 0.014; VDwl max. 0.25
• G10 — Roundness ΔRSw max. 0.25; Diameter tolerance VDws 0.25; Surface roughness Ra max. 0.02; VDwl max. 0.5
• G16 — Roundness ΔRSw max. 0.4; Diameter tolerance VDws 0.4; Surface roughness Ra max. 0.025; VDwl max. 0.8
• G20 — Roundness ΔRSw max. 0.5; Diameter tolerance VDws 0.5; Surface roughness Ra max. 0.032; VDwl max. 0.8
• G24 — Roundness ΔRSw max. 0.6; Diameter tolerance VDws 0.6; Surface roughness Ra max. 0.04; VDwl max. 1.2
• G28 — Roundness ΔRSw max. 0.7; Diameter tolerance VDws 0.7; Surface roughness Ra max. 0.05; VDwl max. 1.4
• G40 — Roundness ΔRSw max. 1; Diameter tolerance VDws 1; Surface roughness Ra max. 0.06; VDwl max. 2
• G60 — Roundness ΔRSw max. 1.5; Diameter tolerance VDws 1.5; Surface roughness Ra max. 0.08; VDwl max. 3
• G100 — Roundness ΔRSw max. 2.5; Diameter tolerance VDws 2.5; Surface roughness Ra max. 0.1; VDwl max. 5
• G200 — Roundness ΔRSw max. 5; Diameter tolerance VDws 5; Surface roughness Ra max. 0.15; VDwl max. 10

Characteristics / Technical specifications

• Material: Silicon nitride (Si3N4)
• Key properties: high strength, wear and corrosion resistance, high temperature stability, electrical insulation, non-magnetic
• Continuous high-temperature performance up to 1200℃ while retaining mechanical properties
• Low density, high densification and self-lubrication; resistant to rust and many chemicals
• Low thermal expansion coefficient and good thermal shock resistance
• Typical uses: ball mills, stirring mills, vibration mills; grinding, crushing and dispersion of ceramic powders, magnetic materials, non-metallic minerals and pyrotechnic materials
• Available precision grades: G3 to G200 with parameters listed above