片晶α-Al2O3是一种重要的陶瓷材料,在低温下制备尺寸可控的片晶α-Al2O3具有重要的意义.通过机械球磨α-Al (OH)3和K2SO4混合粉末,然后在900℃下煅烧混合粉末,制备了片晶α-Al2O3.研究了球磨转速和混合粉末中K/Al物质的量比对所得产物晶体结构及形貌的影响.结果表明,高球磨转速能有效促进γ-Al2O3向α-Al2 O3的相变过程,并导致片晶α-Al2O3的平均直径减小；K/Al物质的量比对γ-Al2O3的相变过程有很大影响.研究发现,K2 SO4能够有效促进γ-Al2O3向α-Al2 O3的相变；片晶α-Al2O3的生成和液相的K3Al(SO4)3有关.
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