氧化铝 99.99%(高纯试剂,晶型α,0.20μm),99.99%(高纯试剂),AR,99.99%(高纯试剂),5~6μm,粉末,99.99%(高纯试剂),α晶型约95%,晶型γ约5%,80nm,99.99%(高纯试剂),α晶型约90%,晶型γ约10%,50nm,99.99%(高纯试剂),α晶型约90%,晶型γ约10%,60nm,99.9%, 2.5μm,99.9%, 1-2μm,99.99%(高纯试剂)