Guangzhou Zoli Technology Co.,Ltd.
Guangzhou Zoli Technology Co.,Ltd.
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Guangzhou Zoli Technology Co.,Ltd. is a manufacturer and exporter of advanced milling equipment and materials, specializing in nanotechnology solutions.
All these items are used in ball mills, which are devices used to grind, mix, and homogenize materials into very fine powders. The process involves placing the sample and grinding balls inside a jar, which is then shaken, spun, or vibrated at high speeds. The impact and friction from the balls crush the material.
Agate Ball Mill Jar
ZOLI High purity natural Brazilian agate grinding jars, highly wear-resistant and resistant to acids (except HF), with advantages of no impurities, no cracks, glossy, high-quality, strong vibration resistance. After experiments, it shows that the item have no cracks, no bump after high-speed vibration abrasion.
We can customize various types of vacuum jar according to customer’s needs.
Physical Parameters
| Composition % | Specific Gravity g/cm3 | Bulk Density kg/L | Hardness Mohs |
| SiO2 :≥99.2 | >2.7 | >1.5 | 6.5~7 |
Specification Parameters
| Volume of Jar | Outside Diameter (mm) | Inner Diameter (mm) | Inner Depth (mm) | Height of without lid (mm) | Total Height (mm) |
| 50ml | 65 | 45 | 37 | 49 | 58 |
| 100ml | 73 | 50 | 52 | 62 | 70 |
| 150ml | 90 | 62 | 55 | 70 | 80 |
| 250ml | 93 | 73 | 70 | 80 | 90 |
| 400ml | 105 | 82 | 80 | 93 | 103 |
| 500ml | 104 | 86 | 90 | 100 | 108 |
| 1L | 133 | 107 | 114 | 126 | 140 |
| 1.5L | 167 | 137 | 103 | 118 | 133 |
| 2L | 156 | 130 | 155 | 170 | 188 |
| Remarks: 1. Size deviation within ±2mm; 2.Agate covered 1mm stainless steel outside as per request; | |||||
Material: Made from agate, a very hard, dense, and chemically inert semi-precious stone (a form of quartz/SiO₂).
Key Properties:
Contamination-Free: Their extreme hardness and purity mean they won't contaminate the sample. They are ideal for grinding high-purity materials, ceramics, and minerals.
Chemically Inert: Resistant to acids and solvents (except Hydrofluoric Acid, which dissolves SiO₂).
High Wear Resistance: They have a very long lifespan, though they are more brittle and can crack from impact.
Typical Use: X-ray diffraction (XRD), trace element analysis, advanced ceramics, and any application where even minute metallic contamination is unacceptable.
This is the broad, general term for any jar used in a ball mill. They can be made from various materials:
Stainless Steel: Durable and common, but can contaminate samples with Cr, Fe, Ni.
Agate: For contamination-free grinding (as above).
Tungsten Carbide: Extremely hard and wear-resistant, but can introduce tungsten/cobalt contamination.
Zirconia (ZrO₂): A great balance of high hardness and good chemical resistance, very common for general purpose and high-energy milling.
PTFE (Teflon): For applications requiring extreme chemical resistance to acids, but soft and low energy.
Polyurethane/Nylon: For low-impact mixing or blending.
This is not a standard technical term but rather a descriptive one. It likely refers to:
Coarse Grinding Stage: The initial jar used for the primary size reduction of a sample, breaking it down from large chunks (e.g., 10mm) to a coarse powder (e.g., 100-500µm).
Jar Characteristics: These jars and the balls inside are often designed for high impact and might be larger in volume. They might use larger diameter balls and be made of a more durable material like stainless steel or tungsten carbide for this rough work, before a finer grinding stage in a different jar (like an agate one).
Specialized Design: These are jars specifically engineered to be sealed and connected to a vacuum pump. They are used with planetary ball mills.
Key Function: They allow the jar's internal atmosphere to be removed or controlled.
Why Use Vacuum?
Prevent Oxidation: To grind materials that are sensitive to air or moisture (e.g., metals, certain alloys, reactive chemicals).
Prevent Caking: Some sticky or moist materials won't grind properly in air; grinding in a vacuum or inert gas (like Argon or Nitrogen) solves this.
Cooling: The process can be less thermally stressful on the sample.
Material: They can be made from stainless steel, agate, or zirconia, but with specialized seals and valves for vacuum/pressure.
These are the "tools" that do the actual work. They are spheres made of the same range of materials as the jars (agate, stainless steel, zirconia, etc.).
Critical Rule: You must always match (or use a harder material for) the ball material to the jar material to prevent excessive wear on the jar.
Example: Use Agate balls in an Agate jar. Use Zirconia balls in a Stainless Steel jar. Do not use Tungsten Carbide balls in a Zirconia jar, as the WC is harder and will rapidly destroy the jar.
Sizing: They come in many diameters (e.g., 3mm, 5mm, 10mm, 20mm). Using a mix of sizes is common to improve grinding efficiency.
These are the capacities of the jars. The choice depends on your sample size and the mill you are using.
50ml Jars: Used for very small sample quantities (typically a few grams). Common in research labs for expensive or rare materials.
100ml Jars: A standard, versatile size for small to medium-sized batches of sample.
250ml Jars: Used for larger sample preparations or when you need to process a more significant volume.
Important Considerations for Volume:
Fill Level: You should never fill a jar more than 1/3 to 1/2 of its volume with the total of your sample and grinding balls. The balls need space to move and impact effectively.
Mill Compatibility: Jars are designed to fit specific mill models. A 250ml jar from one brand might not fit the mill of another.
Let's say you are a materials scientist preparing a ceramic powder for analysis with X-ray Diffraction (XRD), which is highly sensitive to contamination.
Goal: Grind 15 grams of a coarse ceramic down to a sub-micron powder without contamination.
Jar Selection: You would choose a 100ml Agate Jar because:
The volume is right for your sample size.
The agate material ensures no metallic contamination that would ruin your XRD results.
Mill Type: To achieve a very fine powder, you would use a Planetary Ball Mill for its high energy.
Special Requirement: The ceramic is sensitive to moisture. You would use a Vacuum Planetary Ball Mill Jar, evacuate the air, and backfill it with dry nitrogen gas before milling.
Grinding Media: You would fill the jar with a mix of Agate Grinding Balls of various sizes (e.g., 5mm, 10mm) to maximize grinding efficiency, ensuring they are also made of agate to match the jar.
In summary, your selection depends on:
Sample Material: What are you grinding? (Dictates jar/ball material)
Required Fineness: How fine does it need to be? (Dictates mill type and time)
Sample Sensitivity: Is it sensitive to heat, air, or moisture? (Dictates need for vacuum/cooling)
Sample Quantity: How much do you have? (Dictates jar volume)