99% Alumina Corundum Ball Mill Jar Wear-resistant Planetary Ball Mill Vertical Cylindrical

This product is a high-performance vertical cylindrical grinding jar specifically engineered for use in planetary ball mills. It is constructed from 99% pure alumina (Al₂O3), a material also known as corundum, making it exceptionally wear-resistant and ideal for applications demanding minimal contamination.

Physical Parameters

Specification Parameters

Package

99% Alumina Ceramic: The jar is sintered from high-purity alumina powder, ensuring a content of 99% Al₂O3 or higher. This high purity is the foundation of its superior properties.

Corundum Structure: The term "corundum" refers to the specific crystalline form of aluminum oxide, which is one of the hardest minerals known (9 on the Mohs scale, with diamond being 10). This gives the jar its exceptional hardness and wear resistance.

Extreme Hardness: Its primary feature is its incredible surface hardness, which far exceeds that of stainless steel. This results in minimal abrasion during the milling process, even when grinding highly abrasive materials or using hard grinding media like zirconia balls.

Low Contamination: The wear resistance directly translates to extremely low levels of contamination. The jar introduces only trace amounts of aluminum and oxygen into the sample, which is acceptable for most high-purity applications, unlike metallic jars that introduce iron, chromium, and nickel.

Long Service Life: Due to its minimal wear, the jar has an exceptionally long operational lifespan, providing excellent value and consistency over time.

Geometry: The jar features a classic vertical cylindrical shape. This design is optimal for planetary ball mills as it promotes a efficient rolling and cascading motion of the grinding balls within the jar. This ensures a homogeneous grinding effect and efficient particle size reduction.

Sealed Lid System: The jar is equipped with a precisely fitting lid that utilizes a silicone or rubber O-ring to create a hermetic seal. This is critical for:

• Grinding under Inert Atmosphere: The jar can be purged with argon or nitrogen gas to prevent oxidation or degradation of air-sensitive materials.
• Preventing Leakage: Essential for wet grinding processes with solvents.
• Containing Vacuum: Allows for grinding in a vacuum environment if required.

Precision Engineering: The jar and lid are machined to precise tolerances to ensure perfect balance on the planetary mill's sun wheel, preventing vibration and ensuring safe operation at high speeds.

• Ultra-Low Contamination: Ideal for preparing samples for ICP-MS, XRF, and other sensitive analytical techniques. Critical for battery materials, ceramics, and electronics research.
• Superior Wear Resistance: Outperforms most other jar materials (except zirconia) in durability against abrasive wear.
• High Chemical Inertness: Resistant to acids, solvents, and corrosive materials, making it suitable for a vast range of wet and dry grinding applications.
• Non-Magnetic: Essential for processing materials where magnetic impurities must be avoided.
• Smooth Internal Surface: The vitrified ceramic surface is easy to clean and prevents sample material from adhering to the walls.

Brittleness: Like all ceramics, it is susceptible to chipping or cracking from sharp impacts, drops, or thermal shock.

Operating Precautions:

1. Never operate the mill empty (without grinding media and sample).
2. Use the correct filling ratio (typically 1/3 to 2/3 of the jar's volume with grinding media and sample).
3. Avoid large, heavy grinding media that could cause impact fracture.
4. Handle with care to avoid knocking against hard surfaces.
5. Avoid rapid temperature changes.

• Advanced Material Research: Grinding of ceramic powders (zirconia, silicon nitride), battery electrode materials (LFP, NMC, graphite), and magnetic materials.
• Geological & Archaeological Sample Preparation: For analysis where metallic contamination must be eliminated.
• Pharmaceuticals: Size reduction of active ingredients where metal catalyst impurities are a concern.
• Pigments & Dyes: Processing where color integrity is critical and must not be affected by metal stains.
• Chemistry & Biology: Homogenizing and mixing sensitive compounds.

This 99% alumina corundum jar is a wear-resistant, high-purity workhorse for any laboratory planetary ball mill. Its vertical cylindrical design ensures optimal grinding efficiency, making it the go-to choice for researchers who prioritize sample integrity, require long-term durability, and need to avoid metallic contamination at all costs. Proper handling is essential to maximize its excellent performance and long lifespan.

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