30mm Grinding Ball, Zirconium Oxide

30mm Zirconium Oxide Grinding Ball

Zirconium Oxide Grinding Balls are essential media for sample preparation and size reduction in Fritsch Planetary Mills. Used in conjunction with grinding bowls, these balls crush, mix, and homogenize materials through high-impact energy. The final particle size of your sample is influenced by the size, number, and material of the grinding balls used. This 30mm Zirconium Oxide ball is sold individually and is ideal for specific milling applications.

Application and Usage Guidelines

• Sizing Principle: For effective grinding, the size of the grinding balls should be approximately three times larger than the largest particles of the sample. As a general rule, larger balls produce a coarser final product, while smaller balls result in a finer grind. It is not recommended to mix balls of different sizes in the same jar.
• Loading Capacity: For optimal performance, the grinding bowl should not be filled more than two-thirds of its total volume with the sample and grinding balls combined. Leaving at least one-third of the volume empty allows for sufficient movement and effective grinding action.
• Grinding Time & Quantity: Increasing the number of balls can reduce grinding time and produce a finer particle size distribution. However, this is only effective up to an optimal loading point. Users should conduct trials to determine the ideal ball quantity and grinding duration for their specific material and desired outcome.

Material Selection

• Hardness: Zirconium Oxide (ZrO₂) is a very hard and dense ceramic material, making it suitable for grinding hard and abrasive samples. It is recommended to use grinding media (balls and bowl) made of a material harder than the sample to minimize contamination and wear. For exceptionally hard samples, consider using Zirconium Oxide balls in Sintered Corundum bowls.
• Contamination: While Zirconium Oxide offers excellent wear resistance, using dissimilar materials for the bowl and balls can lead to cross-contamination.

Please note: Balls with a diameter of 3mm and smaller are sold in packs of 100. All other sizes, including this 30mm ball, are sold individually. Compatible Grinding Bowls (Classic or Premium) are sold separately.

Key Specifications

• Diameter: 30mm
• Material: Zirconium Oxide (ZrO₂)
• Density: 5.7 g/cm³
• Recommended Use: Ideal for fibrous and abrasive samples, as well as applications where iron contamination must be avoided.
• Bowl Compatibility: Suitable for use with 250ml and 500ml grinding bowls.