高能球磨预处理工业氧化铝对制备亚微米α-Al_2O_3形貌的影响  

Effect of commercial Al_2O_3 from high-energy ball milling pretreatment on morphology of α-Al_2O_3 submicropowders

作　　者：朱玲玲[1] 刘洛强 张星 李红霞[2] 丁达飞 叶国田[1] Zhu Lingling;Liu Luoqiang;Zhang Xing;Li Hongxia;Ding Dafei;Ye Guotian(School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China)

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001 [2]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《耐火材料》2018年第6期401-405,共5页Refractories

摘　　要：为了制备粒度均匀的亚微米α-Al_2O_3粉,以工业氧化铝(Al_2O_3的质量分数为99. 66%)为原料,研究了高能球磨时间(0、5、9和15 h)对工业氧化铝颗粒形貌及1 300和1 450℃煅烧3 h后制备亚微米α-Al_2O_3形貌的影响。结果表明:随着高能球磨时间从5 h延长至15 h,工业氧化铝的颗粒尺寸逐渐细化,聚集体(20～100μm)经高能球磨15 h后,粉碎为1μm左右、分散性较好的小尺寸团聚体; 1 300和1 450℃煅烧所得α-Al_2O_3的颗粒形貌与γ-Al_2O_3形貌密切相关,α-Al_2O_3的晶粒尺寸随γ-Al_2O_3高能球磨时间的延长而细化,粒度分布的均匀性也逐渐提高。综合对比高能球磨不同时间的工业氧化铝经高温煅烧后制备α-Al_2O_3粉的颗粒形貌,高能球磨15 h的工业氧化铝经1 450℃煅烧3 h制备所得亚微米α-Al_2O_3的晶粒分布良好,晶粒尺寸在500 nm左右。In order to synthesize α-Al2O3 submicro-powders with uniform size,the influence of high-energy ball milling time( 0,5,9 and 15 h) on the morphology of commercial Al2O3( 99. 66%Al2O3) and the synthesized α-Al2O3 submicro-powder after calcination at 1 300 and 1 450 ℃ for 3 h was studied. The results show that the particle size of commerical Al2O3 gradually decreases when the high-energy ball milling is extended from 5 h to 15 h,and the commerical Al2O3 aggregates are crushed from 20-100 μm to about 1 μm after milling for 15 h. The morphology of the formed α-Al2O3 powders after calcination at 1 300 and 1 450 ℃ varies with the morphology of the precursor. The grain size of α-Al2O3 gradually declines with the increase of high-energy ball milling time,and the distribution uniformity of α-Al2O3 is gradually improved. By comprehensive comparison,α-Al2O3 powders synthesized by the calcination of 15 h high-energy ball milled commercial Al2O3 at 1 450 ℃ have good size distribution,and the grain size of the α-Al2O3 submicropowders is about 500 nm.

关 键 词：工业氧化铝 亚微米α-Al2O3 高能球磨 煅烧温度 粒度分布 

分 类 号：TQ133.1[化学工程—无机化工]