Gamma Spherical Alumina Powder CAS 1344‑28‑1 is porous spherical γ‑Al₂O₃ manufactured via sol‑gel forming, spray spheroidization and controlled low‑temperature calcination. It maintains abundant interconnected pore channels and high specific surface area without transforming into dense alpha‑phase alumina. Good spherical flow‑ability reduces dust generation. It serves as functional raw material for catalyst carrier, adsorbent purification media and special industrial coating, enabling active com

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Gamma Spherical Alumina Powder CAS 1344‑28‑1, Porous γ‑Al₂O₃ for Catalyst Carrier Adsorbent & Coating

This gamma spherical alumina powder is produced through sol‑gel preparation, spray spheroidization granulation and carefully regulated low‑temperature calcination. The calcination temperature is strictly controlled to retain the metastable gamma crystal phase, avoiding phase transition into dense α‑Al₂O₃. The finished particles exhibit spherical shape with abundant interconnected mesoporous pore channels, high specific surface area and well‑distributed pore‑size range. Oversized agglomerated granules and non‑spherical fragments are removed by screening and air classification.

Different from dense alpha‑phase spherical alumina which is mainly used for thermal‑conductive filling, porous γ‑Al₂O₃ focuses on adsorption and supporting functionality. The developed internal pore network provides large anchoring sites for active metal species. Regular spherical particle morphology delivers favorable powder flowability, reduces dust formation, and improves bed permeability when packed inside fixed‑bed reaction columns or adsorption towers.

For catalyst carrier applications, the porous spherical gamma‑alumina acts as an ideal support medium. Active metals such as platinum, palladium, nickel or cobalt can be impregnated into the internal mesoporous structure. The pore system facilitates mass transfer of reactant and product molecules during catalytic reactions. Spherical granule shape lowers pressure drop across fixed‑bed reactor beds, which is critical for petroleum refining, hydrogenation, exhaust gas treatment and chemical synthesis catalytic processes.

For adsorbent usage, the tunable pore structure enables selective adsorption of polar molecules, volatile organic contaminants and heavy‑metal ions from gas or liquid streams. It can be deployed for drying, hydrocarbon removal, waste‑water purification and gas‑phase purification. The spherical particle form minimizes fine particle elution in flowing media.

For industrial functional coating applications, gamma spherical alumina powder is incorporated into water‑based or solvent‑based coating systems. It improves coating hardness, scratch‑resistance and anti‑abrasive performance. Its porous surface can also anchor functional additives inside the coating film. It is not recommended for high‑thermal‑conductivity composite formulas because gamma‑alumina possesses relatively low thermal conductivity compared with alpha‑phase alumina.

Surface modification can be performed to adjust pore surface chemical properties according to customer requirements, altering surface hydroxyl group density for optimized impregnation or adsorption performance.

During processing and formulation operations, moderate mixing speed is required. Excessive high‑shear stirring must be avoided. Violent mechanical force will break porous spherical granules, destroying the original mesoporous network and generating fine dust. Broken fine particles will cause increased pressure drop in fixed‑bed adsorption or catalytic systems.

Formulation and loading parameters require laboratory testing. In coating systems, excessive addition of gamma spherical alumina may increase coating slurry viscosity, reduce leveling performance and degrade final film appearance. For catalyst preparation, impregnation concentration, solution pH and curing temperature need optimization to achieve uniform active‑metal distribution within the pore network.

The powder shall be stored in hermetically sealed moisture‑proof containers inside a dry warehouse. Gamma‑alumina has strong hygroscopic tendency; uncontrolled moisture uptake will occupy internal pore space and reduce available adsorption capacity and metal‑loading capability. Strict physical segregation from dense alpha‑phase spherical alumina should be enforced during storage and feeding, to prevent cross‑contamination which would disrupt pore‑related performance for catalyst and adsorbent products. This porous spherical γ‑Al₂O₃ is a specialized functional inorganic material for catalyst carrier, adsorbent purification and industrial functional coating.

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.