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9-10mm Pressureless Sintered Silicon Carbide Grinding Balls are medium-to-large ceramic milling media specifically designed for drum ball mills. Engineered for coarse grinding and intermediate comminution of high-hardness, brittle materials, this size range offers optimal balance between impact momentum and specific surface area.
Product Positioning
These grinding balls are ideal for high-throughput applications including mineral processing, specialty ceramic raw materials, pre-crushing of superabrasives, and coarse milling of new energy battery material precursors. Manufactured from nano-sized silicon carbide powder via high-temperature pressureless sintering, they deliver exceptional strength, extreme hardness, superior wear resistance, high-temperature tolerance, and resistance to acids and alkalis.
Resists deformation or fracture under high speed/pressure
Thermal Properties
Max. Service Temperature
Up to 1600°C
Maintains high strength and hardness at elevated temperatures
Coefficient of Thermal Expansion
~3.8 * 10⁻⁶ /℃
~25% of steel, excellent thermal stability
Quality & Precision
Sphericity Deviation
≤ 0.5 μm (precision grade)
Bearing-grade balls can achieve even tighter tolerances
Surface Roughness
Ra ≤ 0.02 μm (precision grade)
Significantly reduces friction coefficient
Precision Grade
G10 / G16 optional
Complies with precision ceramic ball standards
Size Accuracy
φ 9 mm / φ 10 mm
Custom sizes available upon request
Breakage Rate
≤ 0.2%
Under normal milling conditions
Core Advantages of Pressureless Sintering Process
Pressureless sintering densifies silicon carbide powder at high temperature (>2000°C) without external pressure, offering superior performance compared to reaction sintering:
Aspect
Pressureless Sintered
Reaction Sintered
Comments
Density (g/cm³)
> 3.15
> 3.02
Higher densification, lower porosity
Hardness (Hv)
2000-2500
--
Higher hardness, superior wear resistance
Corrosion Resistance
Excellent against strong acids & bases
Poor resistance to HF and superacids
More comprehensive chemical stability
High-Temperature Performance
Maintains strength up to 1000°C
Flexural strength drops sharply above 1400°C
Significantly better high-temperature stability
Wear Resistance
Excellent
Good
Outstanding overall wear resistance
Fracture Resistance
High
Good
Higher impact resistance due to better densification
Production Process
Complex, high capital investment
Simpler, lower cost
Higher production threshold
Self-Lubricity
Good
Slightly better due to free Si
Minor advantage for reaction-sintered
Applications & Technical Value
Intermediate Crushing & Coarse Grinding of Superhard Materials
Pre-grinding of SiC, B₄C, Si₃N₄, Al₂O₃, and other hard-brittle materials
Extremely high hardness (second only to diamond) enables efficient comminution
Very low impurity introduction preserves powder purity and particle size consistency
Mineral Processing & Ceramic Raw Material Preparation
Efficient crushing of architectural and industrial ceramic raw materials
Replaces conventional steel or alumina balls, significantly reducing milling energy consumption
Suitable for dry or wet grinding of non-metallic minerals
New Energy Material Pre-treatment
Coarse grinding and dispersion of precursors for lithium-ion battery cathode and anode materials
Uniquely avoids metallic contamination, safeguarding the purity of battery materials
Specialty Ceramics & Powder Metallurgy
Self-grinding of high-purity SiC powder - using identical material eliminates cross-contamination
Ideal for electronic ceramics, structural ceramics, and other purity-sensitive production processes
Quality Assurance & Manufacturing Standards
Raw Material Control: High-purity nano-sized SiC powder with appropriate sintering aids
Forming: Cold isostatic pressing ensures uniform green density
Sintering: High-temperature pressureless sintering in non-oxidizing atmosphere
Precision Finishing: Processed to G10/G16 grade precision with sphericity deviation <0.5 μm
Quality Inspection: Full-line production quality monitoring with advanced testing equipment
Strict restrictions on metal contamination and magnetic particles
Wet milling requiring long-term resistance to acidic or alkaline slurries (pH 2-12)
Dry or semi-dry milling with elevated temperatures (200-800°C)
Goal of minimizing media consumption and reducing replacement frequency
Consider Alternative Media When
Feed size > 8-10 mm in coarse crushing stage, or severe impact
Extremely cost-sensitive, small-scale production
Need for maximum fracture toughness and impact fatigue resistance in fine grinding
Summary
The 9-10 mm pressureless sintered SiC grinding ball combines high hardness, exceptional wear resistance, excellent thermochemical stability, and good impact toughness. With ultra-low wear rate (only 1/5 that of zirconia balls), minimal impurity introduction, and long service life, it delivers significant technical and economic value in new energy materials, specialty ceramics, superabrasive processing, and advanced mineral processing.
For further information or to discuss your specific requirements, please contact us directly.
