DURA-52 復合氧化鋯珠(ATZ)是由釔穩定的氧化鋯和氧化鋁微粉經精磨，乾燥后滾動成形。均一的微晶結構給珠子帶來理想的耐壓強度和耐磨性。相對於釔穩定的四方氧化鋯珠，雖然密度稍有降低，但價格便宜為其加分不少，大部分場合能代替四方氧化鋯珠，匹配的砂磨機線速度可達14米/秒。
DURA-52 Alumina Toughened Zirconia (ATZ) bead was granulated from the ultra fine zirconium dioxide and alumina powder. The consistent micro poly-crystal benefits high compressive strength and wear resistance of beads. Although there is a lower density than T-TZP (Yttria-Tetragonal Zirconia Polycristal), the lower unit cost is an obvious plus. It can replace it in more application and is competent the mills with high tip speed up to 14m/s.
密度Specific Gravity： 5.2kg/dm3
堆積密度Bulk Density： 3.2-3.4kg/L
微觀硬度Micro Hardness： 1100kg/mm2
抗壓強度Compressive Strength： 180kgf(2mm)
粒徑Sizes： 0.6-3.5mm
包裝Packing： 25kg/桶