ASTM D4926

ASTM D4926 is a test method for measuring gamma alumina content in catalysts and catalyst carriers that contain silica and alumina, using X-ray powder diffraction. It provides a standardized approach for evaluating a specific crystalline phase within these materials, which can be important for consistent material characterization and quality decisions. For laboratories and product users, this ASTM standard supports more reliable comparison of results across batches, suppliers, and testing programs.

Purpose of ASTM D4926

The purpose of ASTM D4926 is to define a repeatable method for determining gamma alumina content in silica- and alumina-containing catalyst materials. By using X-ray powder diffraction, the standard focuses on a measurement approach suited to identifying and assessing this phase in a controlled way. This helps users apply a common technical basis when testing catalyst materials and catalyst carriers, especially where phase content may affect product evaluation, consistency, or acceptance decisions.

Common use cases of ASTM D4926

This standard is commonly used in laboratory testing environments that support catalyst manufacturing, material qualification, and incoming or outgoing quality checks. It is relevant when a catalyst or catalyst carrier contains both silica and alumina and the gamma alumina content needs to be measured in a standardized manner. ASTM D4926 may also be used in product development, supplier comparison, and routine documentation for technical review or compliance workflows.

Why ASTM D4926 matters

ASTM D4926 matters because a clear, consistent method helps reduce uncertainty when evaluating gamma alumina content in complex catalyst materials. Standardized test practices support better quality control, more dependable procurement comparisons, and more meaningful specification checks. For organizations working with catalyst carriers and related materials, using this ASTM standard can improve repeatability, help align internal testing with external expectations, and reduce the risk of inconsistent interpretation.

• Gamma alumina content measurement
• X-ray powder diffraction method
• Catalysts and catalyst carriers
• Silica and alumina-containing materials
• Quality and comparison testing