氢氧化铝活化对水热法制备勃姆石的影响  

Effect of gibbsite activation on preparation of boehmite by hydrothermal method

作　　者：杨永钰 田朋[1,2] 周若辉 徐前进 刘坤吉 宁桂玲 YANG Yongyu;TIAN Peng;ZHOU Ruohui;XU Qianjin;LIU Kunji;NING Guiling(Dalian University of Technology-Baohong Technology United Research Center for Advanced Lithium Battery Materials,School of Chemical Engineering,Dalian University of Technology,Dalian 116023,China;Jiangxi Baohtech Science Co.,Ltd.)

机构地区：[1]大连理工大学-宝弘科技锂电新材料联合研究中心,辽宁大连116023 [2]江西宝弘纳米科技有限公司

出　　处：《无机盐工业》2022年第9期55-62,共8页Inorganic Chemicals Industry

基　　金：江西省技术创新引导类计划项目-科技合作专项(锂电池隔膜用勃姆石制备技术的联合研究,2021BDH81011);江西省主要学科和技术带头人培养计划项目(催化用高纯拟薄水铝石的制备技术研究,20213BCJ22020);国家重点研发计划(高性能多孔氧化铝小球及相关催化剂创制与工业应用,2021YFA1500300)。

摘　　要：采用氢氧化铝粉体为原料,活化后通过水热法制备勃姆石。研究了氢氧化铝活化对勃姆石颗粒尺寸的影响,并讨论了相关机理。研究结果表明:未活化氢氧化铝水热反应所得产物颗粒粒径为2μm,经过加热(160~220℃)活化的氢氧化铝,水热反应所得产物的颗粒粒径在0.3~2μm变化。对活化氢氧化铝和水热反应中间产物进行表征,由结构分析推测作用机制:氢氧化铝加热活化过程中生成少量勃姆石,这些勃姆石在氢氧化铝水热反应转化为勃姆石(AlOOH)的过程中成为晶种,活化温度升高和活化时间延长,勃姆石晶种数量增加,氢氧化铝水热反应所得产物的颗粒粒径减小,并且加快了水热反应速率。该工作有望提供一种氢氧化铝水热法制备勃姆石的新途径和相关基础理论。Boehmite was prepared by hydrothermal method with gibbsite powder as raw material after activation.The effect of gibbsite activation on boehmite grain size was investigated,and the action mechanism was discussed.The results showed that by using unactivated gibbsite as raw materials,the particle size of boehmite was about 2μm and the particle size of boehmite changed in the range of 0.3μm to 2μm by using activated gibbsite(treated under 160~220℃)as raw materials.The activated aluminum hydroxide and hydrothermal reaction intermediates were characterized.The mechanism of action from structural analysis was inferred:A small amount of boehmite was formed during activation process.These boehmite became crystal seeds during the hydrothermal conversion of Al(OH)_(3)to AlOOH.With increase of activation temperature or activation time,the number of boehmite crystal seeds was increased,the particle size of hydrothermal products(boehmite)was reduced,and hydrothermal reaction rate was speeded up.This work was expected to provide a new route for the preparation of boehmite and a theoretical basis.

关 键 词：氢氧化铝 水热法 颗粒尺寸 勃姆石 加热活化 

分 类 号：TQ133.1[化学工程—无机化工]