氧化铝α相变影响因素探析

Analysis on Influencing Factors of α-Phase Transformation of Alumina

在低温下制备高转相率的α-氧化铝,对于降低能耗、降低粉体一次粒径、防止粉体团聚、控制粉体微观形貌,从而提高粉体成瓷性能至关重要。介绍了氧化铝的α相变、相变过程及其相变机理,通过煅烧条件、添加剂、粉碎、加入晶种、前驱体处理、抑制因素等几个方面,对氧化铝α相变的影响因素进行了综述与探析,为工业制备高性能α-氧化铝粉体提供参考依据。

The preparation of α-alumina with high phase conversion rate at low temperatures is essential for reducing energy consumption, reducing the primary particle size of the powder, preventing powder agglomeration, controlling the microscopic morphology of the powder, and thus improving the performance of powder into porcelain. The α-phase transformation, phase transformation process and phase transformation mechanism of alumina are introduced. The influencing factors of α-phase transformation of alumina are summarized and analyzed through calcination conditions, additives, crushing, adding seeds, precursor treatment, inhibition factors, etc., which provide reference for industrial preparation of high-performance α-alumina powder.