GB/T 6609.25-2004 for the determination of aluminum oxide Loose Bulk Density. The standard describes the principle of using specific devices to naturally accumulate aluminum oxide powder to determine Loose Bulk Density. Specify the specifications of instruments such as funnel and measuringflask, and detail the preparations for the collection and processing of aluminum oxide samples. Specify the operation steps of powder loading, and give a method for calculating Loose Bulk Density based on the volume and mass of the accumulation. This standard provides specifications for the uniform and accurate determination of aluminum oxide Loose Bulk Density, which is of great significance to the mass and performance of aluminum oxide production and related applications.