1 LB Alumina Ceramic Balls 1/2" For Ball Milling Corrosion Resistant 99.7% Pure

1/2" Alumina Ceramic Balls — the ultimate high-performance grinding media and support spheres that deliver unmatched durability, purity, and efficiency for demanding applications!

Precision-engineered from 99%+ high-purity alumina (Al₂O₃), these 1/2 inch (12.7 mm) spherical balls are the gold standard for contamination-free processing. Their brilliant white color, exceptional hardness (Mohs 9), and ultra-low wear rate make them indispensable where metal contamination or media degradation simply isn't an option.

Why These Balls Dominate:

  • Grinding & Milling Powerhouse — Perfect as milling media in ball mills, planetary mills, attritors, or vibratory mills. Crush, disperse, and pulverize pigments, ceramics, glazes, ores, paints, inks, pharmaceuticals, electronics materials, and more with superior efficiency and minimal abrasion loss (often <0.01–0.15%). Achieve finer particle sizes faster while keeping your product ultra-pure — no iron or other metallic impurities!
  • Pyrotechnics & Fireworks Essential — Inert support media for safely mixing and tumbling sensitive compositions. Use them in rock tumblers or ball mills for fireworks chemicals without risking reactions or contamination — ideal for producing consistent, high-quality stars, fountains, or glitter effects.
  • Catalyst Bed Support & Inert Packing — High thermal stability (up to 1800°C+), chemical inertness, and low porosity make these balls excellent for supporting catalysts in reactors, reformers, or high-temperature processes (e.g., syngas production, ammonia plants). They distribute flow evenly, resist crushing, and prevent catalyst poisoning.
  • Other Elite Uses — Bearings/valves in corrosive environments, filtration/separation media, water treatment adsorbents, or even as precision spacers in labs and industry.

Standout Specs That Perform:

  • Size: Exactly 1/2" (12.7 mm) diameter — uniform spheres for optimal packing density and grinding contact.
  • Purity: 99–99.7% Al₂O₃ (trace SiO₂, Fe₂O₃, etc.) — maximum inertness and corrosion resistance.
  • Hardness & Density: Mohs 9, ~3.6–3.9 g/cm³ — extreme wear resistance and impact strength.
  • Shape & Finish: Perfectly round, smooth surface — excellent flow, low dust, and consistent performance.
  • Advantages Over Alternatives: Far outlast steel, glass, or zirconia in many cases; zero contamination risk for sensitive materials; cost-effective long-term.

Whether you're running a professional lab mill, crafting world-class fireworks, optimizing a chemical reactor, or tackling ultra-fine grinding projects, 1/2" Alumina Ceramic Balls give you reliable, high-end results every batch.

Shipping info

Click the Shipping & Payments tab above the listing description for more info

Click the Shipping & Payments tab above the listing description for more info!

Additional delivery notes

PICK UP OPTION

Sorry, our items are NOT available for pick-up.

PAYMENT


Immediate payment is required upon selecting "Buy It Now" or upon checking out through the cart.

We accept payment via U.S. PayPal accounts and all Major Credit Cards, Debit Cards & Google Pay.

We are legally required to collect sales tax in those states and localities where we maintain a physical presence (nexus).

The applicable amount of sales tax charged to an order will be calculated based on the shipment destination's state and local sales tax laws.

Thank you for shopping with us on eBay!

Additional Information

No additional information at this time

Ask seller a question

To contact our Customer Service Team, simply click the button here and our Customer Service team will be happy to assist.

Ask seller a question

© Homestead Harvest Co.

Click the Shipping & Payments tab above the listing description for more info

Accepted Payment Methods

Immediate payment is required upon selecting "Buy It Now" or upon checking out through the cart.

We accept payment via U.S. PayPal accounts and all Major Credit Cards, Debit Cards & Google Pay.

We are legally required to collect sales tax in those states and localities where we maintain a physical presence (nexus).

The applicable amount of sales tax charged to an order will be calculated based on the shipment destination's state and local sales tax laws.

Thank you for shopping with us on eBay!

Returns are not accepted

Seller will pay for return shipping.

It is the buyers responsibility to follow all local laws regarding ordering, shipping, or importation of goods into their respective country. Refunds cannot be given for any order that is seized by customs due to ordering goods that are restricted in their country. Returns can only be accepted when the product is shipped back unused in its original packaging. Orders are weighed before shipping and again when a return is received. If the weight differs or the materials were clearly used then a refund cannot be issued.