Planetary Ball Mill, Small Laboratory Dry And Wet Dual-purpose Planetary Ball Mill, Agate Grinding Jar

This machine is a small, versatile planetary ball mill designed for both dry and wet grinding operations in a laboratory setting. When equipped with an agate grinding jar, it becomes an essential tool for preparing ultra-fine, contamination-sensitive samples across various scientific disciplines. Its compact design and dual-purpose capability make it a cornerstone for R&D work where material purity and precise particle size reduction are paramount.

1. 1. The Agate Grinding Jar (The Key to Purity)

   Material: Agate is a natural form of Silicon Dioxide (SiO₂), closely related to quartz. It is meticulously processed and sintered to create a dense, hard, and incredibly smooth grinding medium.

   Why Agate is Chosen:
   • Extreme Hardness & Wear Resistance: With a Mohs hardness of 6.5-7, it is harder than most common materials, ensuring minimal wear during grinding. This translates to virtually no contamination from the jar itself.
   • Excellent Chemical Inertness: Agate is highly resistant to acids and solvents (except Hydrofluoric acid). It will not react with your sample, preserving its chemical integrity.
   • Smooth, Non-porous Surface: The polished surface prevents particles from embedding in the jar walls, making cleaning between samples exceptionally easy and preventing cross-contamination.
   Ideal For:

   Grinding hard, abrasive materials where even trace metal contamination would ruin the analysis. Examples include geological samples for XRD/XRF, ceramic precursors, semiconductor materials, and pharmaceutical actives.

2. 2. Dry and Wet Dual-Purpose Capability

   This is a critical feature that dramatically expands the mill's application range.

   Dry Grinding:
   • Process: The sample is loaded into the agate jar in a dry, powdered form along with the grinding balls.
   • Advantages: Simpler setup, no need for solvents, easier post-grinding handling and drying.
   • Disadvantages: Can generate more heat due to friction. Material may have a tendency to "cake" or adhere to the jar walls.
   Best For:

   Materials that are not heat-sensitive and where the introduction of a solvent is undesirable.

   Wet Grinding:
   • Process: A liquid medium (e.g., water, ethanol, hexane, or a specialized solvent) is added to the dry powder and balls. The liquid typically fills about 1/3 of the jar's free volume.
   Advantages:
   • Prevents Caking: The liquid helps disperse the particles, reducing agglomeration and leading to a more uniform grind.
   • Cools the Sample: Acts as a coolant, mitigating heat buildup, which is crucial for heat-sensitive materials.
   • Finer Particle Size: Often allows for a finer and more stable particle size distribution by preventing re-agglomeration.
   Best For:

   Achieving sub-micron or nano-scale dispersions, grinding ductile metals, and processing temperature-sensitive samples.

3. 3. Small Laboratory Planetary Ball Mill Mechanism

   Principle: The agate jar is secured on a rotating disk (sun wheel). It simultaneously revolves at high speed around a central axis and rotates around its own axis in the opposite direction.

   Result: This planetary motion generates powerful Coriolis forces. The agate grinding balls inside the jar are subjected to these forces, leading to a combination of high-impact impacts and frictional grinding against the jar walls, efficiently pulverizing the sample.

• Geology & Mining: Preparing pristine soil and rock samples for accurate XRF (elemental analysis) and XRD (mineralogical analysis) without metal contamination.
• Ceramics & Glass: Grinding raw materials and precursors for advanced ceramics where iron contamination must be avoided.
• Pharmaceutical Research: Size reduction of active pharmaceutical ingredients (APIs) for bioavailability studies.
• Archaeology: Contamination-free grinding of ancient artifacts for compositional analysis.
• Electronics: Preparing high-purity ceramic powders for capacitors, sensors, and other electronic components.
• Pigments & Dyes: Fine grinding to develop consistent, high-quality colors without introducing impurities.

• Maximum Purity: The agate jar ensures your sample remains uncontaminated by the grinding process.
• Unmatched Versatility: The dry and wet dual-purpose design allows you to process a vast range of materials using the optimal method.
• High Efficiency: The planetary mechanism provides the high energy necessary for rapid nano-scale grinding.
• Precision and Reproducibility: Programmable controls guarantee that every experiment is repeatable.
• Compact Footprint: The small laboratory size makes it ideal for any lab bench.