1results about How to "Reduce sintering energy consumption" patented technology

This invention discloses a nanoscale α-alumina and its preparation method. Polyethylene glycol, citric acid, and ammonium aluminum sulfate are sequentially added to a urea solution and mixed to obtain a mixed solution. Ammonia water is then added dropwise to the mixed solution, and the mixture is allowed to stand and age to obtain a precursor suspension. The precursor suspension is then separated into solid and liquid phases, and the resulting solid phase is the alumina precursor. The alumina precursor is then calcined to obtain α-alumina. The α-alumina provided by this invention is a pure phase, free of impurities such as γ-Al₂O₃, with a complete crystal structure, a particle size ≤150 nm, a particle size distribution CV value <15%, excellent dispersibility, no obvious hard agglomerates, and a higher specific surface area, making it suitable for applications in high-end electronic ceramics, precision polishing, and other fields.