GB/T 6609.25-2023 is part of the aluminum oxide testing standard. This part focuses on aluminum oxide loose loading and Tapped Density determination, specifying detailed measurement procedures. There are requirements for measurement equipment, such as funnel, measuringflask accuracy, and clear sample preparation and test operation steps. Through standardized methods, accurate measurement of aluminum oxide natural stacking density during loose loading, and density after vibration. Provide key data for aluminum oxide manufacturers to control product mass, evaluate its flowability, filling and other performance in different application scenarios, and help Product Research & Development and application optimization to ensure industry standardized production.