GRINDING MEDIA

90% ALUMINA SATELLITES 90% Alumina media comes in satellite shape-spheres with a slightly raised band around the middle. They are also available in rod/cylinder shape. ALUMINA BALLS AND SATELLITES Union Process is the one source for 90%, 94%, 99.5% and 99.9% alumina media. 90% alumina is available in satellites and rod/cylinders. 94% alumina balls have excellent wear resistance with higher impact strength to save running costs with less contamination. They have great wear rate generally better than 90% or 99.5%. 99.5% alumina balls have the highest alumina content for a moderate price. The .5% impurity is MgO that is added to inhibit grain growth during sintering in the kiln. There is less than 0.1% silica in the media. 99.9% alumina balls are made of very pure and reactive (expensive) rawmaterials. They are for high purity alumina applications where contamination is a factor. ALUMINA BEADS Alumina Beads are specially formulated to be used in high-energy mills in which a high degree of fineness is required. They are used in various industrial fields such as inks, paints, advanced ceramics, mining, cosmetics and pharmaceutical industries. They are a perfectly spherical shape with high mechanical properties and high wear resistance at a moderate price. BURUNDUM CYLINDERS Burundum is a high-density alumina media available in cylinders. It comes in 90%, 96%and 99%alumina compositions. Cylinder sizes range from ¼" x ¼" to 1 ¼" x 1 ¼". They are an ultra-high fired media that are unaffected by most acids and alkalis, chip-resistant and non-porous. CERAMIC SATELLITES (STEATITE) Ceramic Steatite is a very cost-efficient media. They are a satellite shape with composition of MgO 27.5% and SiO2 61.4% along with other minimal materials. GLASS BEADS This grade is used for milling applications with 85% roundness. All Glass Beads are lead-free and less expensive. NYLON PELLETS Nylon Pellets are a very light density, low impact, low-cost media available in 1 ⁄ 8 " size. SILICON CARBIDE BALLS Silicon Carbide Balls are very high-cost grinding media that are used for milling same materials (silicon carbide ball to mill silicon carbide materials) to avoid contamination. They are only available in 5mm,10mm, 15mm and 20mm sizes. They are a special order item. SILICON NITRIDE BALLS Silicon Nitride Balls are very high-cost grinding media that are used for milling same materials (silicon nitride ball to mill silicon nitride materials) to avoid contamination. They are now available in 2mm and 3mm and sizes up to 25mm. They are a special order item. TUNGSTEN CARBIDE SATELLITES/BALLS Tungsten Carbide media is the hardest and densest (highest specific gravity) media and is available in both satellites and balls upon request. They are now available in sizes 0.5mm, 0.6mm, etc., up to 1" diameter. They are a high-cost media and are a special order item. ZIRCONIUM OXIDE BALLS (YTTRIA STABILIZED) HIGH PURITY 95% ZrO 2 ZirconiumOxideBalls (95%ZrO 2 ) are the strongest, best wearing ceramic media for metal-free, pharmaceutical and food processing grinding. These balls have a white, shiny appearance. They are also available in 3 ⁄ 8 " and ½" cylinders. This 95% grade is high-cost. ZIRCONIUM OXIDE BEADS (YTTRIA STABILIZED) 93% ZrO 2 93%ZirconiumOxideBeadsareanotheroption formetal-freeapplications that are lower cost than 95% ZrO 2 . ZIRCONIUM OXIDE SATELLITES/BEADS — CeO 2 RARE EARTH STABILIZED ZirconiumOxide Satellites—Ceria stabilized (rare earth)—are a cheaper zirconiumoxide alternative for metal-free applications. They are a brown, shiny ball media that come in size ranges in the smallest sizes (ex: 0.4– 0.6mm), then at 6mm come in uniform sizes (6mm, 8mm, etc.) up to 31mm. ZIRCONIUM SILICATE BEADS (FUSED AND SINTERED) Zirconium Silicate Beads are available in fused 68% ZrO 2 beads which are a standard reliable media at low cost, and sintered 58% ZrO 2 beads which have high breakage resistance, are durable and cost effective. They are used to microgrind paints, inks, dyes, magnetic coatings, minerals, agrochemicals and ceramics.

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