基于复合熔盐低温制备片状α-氧化铝的研究  

Study on preparation of flake α-alumina based on mixed molten salt at low temperature

作　　者：徐敬尧 周小丽[2,5] 孙敬会 曹阿林 卿培林 XU Jingyao;ZHOU Xiaoli;SUN Jinghui;CAO Alin;QING Peilin(School of Materials Science and Engineering,Baise university,Baise 533000,China;School of Chemical and Environmental Engineering,Baise university,Baise 533000,China;College of Ecological Aluminum Industry,Baise University,Baise 533000,China;Engineering Research Center of Advanced Aluminum Matrix Materials of Guangxi Province,Baise 533000,China;Key Laboratory of Regional Ecological Environment Analysis and Pollution Control of West Guangxi,Baise 533000,China)

机构地区：[1]百色学院材料科学与工程学院,广西百色533000 [2]百色学院化学与环境工程学院,广西百色533000 [3]百色学院生态铝产业学院,广西百色533000 [4]广西壮族自治区铝基新材料工程研究中心,广西百色533000 [5]桂西区域生态环境分析与污染控制重点实验室,广西百色533000

出　　处：《无机盐工业》2023年第2期73-78,共6页Inorganic Chemicals Industry

基　　金：广西高校中青年教师科研基础能力提升项目(2019KY0757,2020KY19020,2020KY19023);百色市科学研究与技术开发计划(百科20221464)。

摘　　要：基于KCl^(-)NaCl^(-)AlF_(3)熔盐体系,采用氢氧化铝为铝源、以氯化钾(KCl)和氯化钠(NaCl)复合熔盐为反应介质、以氟化铝(AlF_(3))为添加剂制备片状α-Al_(2)O_(3)。通过X射线衍射和扫描电子显微镜表征方法研究了氟化铝含量、煅烧温度和保温时间对片状氧化铝形貌和晶型的影响。结果表明,当氟化铝添加量(氟化铝与氢氧化铝的质量比)为5%、煅烧温度为750℃、保温时间为180 min时,可获得片状α-Al_(2)O_(3),其径向尺寸约为5.1μm,径厚比达18,分散性良好。Based on KCl^(-)NaCl^(-)AlF_(3)molten salt system,the flake α-Al_(2)O_(3)was prepared with aluminum hydroxide as aluminum source,potassium chloride and sodium chloride mixed molten salt as reaction medium and aluminum fluoride as additive.Furthermore,the influences of aluminum fluoride content,calcining temperature and holding time on morphology and crystal structure of the flake alumina were studied respectively by characterization methods of scanning electron microscope and X-ray diffraction.The results showed that the flake α-Al_(2)O_(3)with radial size of 5.1 μm,diameter-thickness ratio of 18and good dispersibility was obtained by calcining at 750 ℃ for 180 min with mass ratio of aluminum fluoride and aluminum hydroxide of 5%.

关 键 词：熔盐法 Α-氧化铝 片状氧化铝 低温 

分 类 号：TQ424.27[化学工程]